Blockchair.com API

API v.2 documentation

English: https://blockchair.com/api/docs (up to v.2.0.80)

Please apply for an API key first

tl;dr:

If you use our API occasionally a key is not required
Non-commercial and academic projects constantly using our API should apply for a free Public API key
Commercial projects should apply for a key to Premium API

Since the introduction of our API more than two years ago it has been free to use in both non-commercial and commercial cases with a limit of 30 requests per minute. Obtaining an API key has been required only for those who were hitting this limit.

Beginning July 19th, 2019 we require all applications using our API to obtain an API key.

If you develop a non-commercial project (e.g. a website showing some stats) or conducting academic research, please apply for a free key to our Public API (info@blockchair.com).

If you develop a commercial project (e.g. a web wallet showing ads), please apply for a key to our Premium API (info@blockchair.com).

While we still allow making requests without a key, services which make too many resource-consuming requests may automatically be banned (the API will return HTTP Error 430 in this case).

The key is applied to the end of the request string like this: api.blockchair.com/bitcoin/blocks?key=MYSECRETKEY. Please remember that your key is a secret -- don't disclose it to client-side applications as unauthorized users may start to use your key.

Changelog

v.2.0.88 - August 23rd, 2021
- Added basic SLP support for Bitcoin Cash. New endpoints and options:
  - https://api.blockchair.com/bitcoin-cash/stats now yields statistical data on SLP in the layer_2.slp array: tokens is the total number of SLP tokens, transactions - the total number of SLP transfers, tokens_24h - new SLP tokens over the last 24 hours, transactions_24h - token transfers over the last 24 hours
  - Find SLP transfers inside of a transaction: https://api.blockchair.com/bitcoin-cash/dashboards/transaction/{:hash}?slp=true. Example: https://api.blockchair.com/bitcoin-cash/dashboards/transaction/ca851afc516f6d1488924f4a064abdd8b82b45bc8a5890bee8aba58a1314f498?slp=true (valid SEND transaction), https://api.blockchair.com/bitcoin-cash/dashboards/transaction/71b31ecaf916fe2da690a61c45978542a654185caba643c3eda2a87f38f88d31?slp=true (invalid MINT transaction`)
v.2.0.87 - August 20th, 2021
- For all API requests, the context array now yields market_price_usd value. It contains the current USD price of the blockchain's main token in request. E.g. all https://api.blockchair.com/zcash/... requests show ZEC price in context.market_price_usd. For Ethereum, it's always the ETH price, even if some token data is requested. This change also deprecates context.price_usd for EOS and Tezos in favour of context.market_price_usd.
- New number({:n}) function for aggregations that returns a number. It may be useful when you are too lazy to divide some values on your side, for example, when you're calculating the average interval between blocks in seconds: https://api.blockchair.com/bitcoin/blocks?a=date,f(number(86400)/count()). Our API can now also serve as your calculator for any needs: https://api.blockchair.com/bitcoin/blocks?a=f(number(2)*number(2))&limit=1 returns 4.
- Tweaked suggested_transaction_fee_per_byte_sat for Dogecoin (in https://api.blockchair.com/dogecoin/stats) to honour the minimum fee of 1 DOGE per transaction
- The following Ethereum endpoints are now also available for Ethereum Goerli Testnet:
  - https://api.blockchair.com/ethereum/testnet/raw/block/{:id|hash}
  - https://api.blockchair.com/ethereum/testnet/raw/transaction/{:hash}
  - https://api.blockchair.com/ethereum/testnet/push/transaction
  - https://api.blockchair.com/ethereum/testnet/addresses
  - https://api.blockchair.com/ethereum/testnet/state/changes/block/{:id}
v.2.0.86 - August 19th, 2021
- Error code 435 is now returned if you're using an API key and going over the maximum requests in parallel limit. By default, the limit is daily_request_limit / 10000 request points. Also, by default, it is not enforced: it only comes into effect if our security system notices that your requests significantly overload our servers on a constant basis. This limit supersedes the 5 requests per second limit for premium API plans (which was also not enforced automatically). Example: if you're on a 5000 requests per day plan and do some daily calculations like fetching xpub balances right after the midnight, please try doing this in 2-3 app instances in parallel instead of spawning 1000 instances trying to complete the process in 10 seconds.
v.2.0.85 - August 18th, 2021
- New hashrate dashboard for all Bitcoin-like and Ethereum-like chains: https://api.blockchair.com/{:chain}/dashboards/hashrate that outputs the estimated hashrate by day. Example: https://api.blockchair.com/bitcoin/dashboards/hashrate.
- New difficulty dashboard for Bitcoin: https://api.blockchair.com/bitcoin/dashboards/difficulty. It outputs:
  - All completed difficulty "periods" (2016 blocks each). status is completed, hashrate is the estimated average hashrate within the period, avg_block_time is the average time between blocks in seconds
  - The current difficulty period. status is ongoing
  - The next difficulty period. status is planned, start_time is the estimated time when the period will start based on the current hashrate and the number of blocks left in the current period, difficulty is the estimated difficulty for the next period, hashrate is the same as for the current period, avg_block_time is always 600 (10 minutes) as it's the target time between blocks
v.2.0.84 - August 9th, 2021
- Enhancements to the Ethereum transaction dashboard (https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash}) for unconfirmed transactions. Please note that these values are not final and may change as transactions get confirmed: tracing unconfirmed transactions doesn't take possible changes to the state into account.
  - If the ?events=true option is used, API returns values for gas_used, fee, fee_usd instead of nulls
  - If the ?trace_mempool=true option is used, API returns values for internal_value and internal_value_usd instead of nulls
  - API still always returns null for failed
- There's a new option for the Ethereum address dashboard (https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address}): ?transactions_instead_of_calls=true. If applied, it returns the list of latest transaction hashes in the transactions array instead of returning the calls array. An important difference is that ERC-20 transfers that weren't previously included in the calls array will be among transactions. This option also affects transaction_count behaviour: if enabled, it returns the transaction count for an address which takes ERC-20 transfers into account. Using this option costs 2. The option has no effect on contracts (i.e. for contracts the calls array will be returned even if the option is enabled).
- The Ethereum stats dashboard (https://api.blockchair.com/{:eth_chain}/stats) now also outputs addresses yielding the total number of addresses (including both accounts and contracts) ever seen on chain.
v.2.0.83 - August 6th, 2021
- Added support for the Ethereum London hard fork. New table fields (for Ethereum and Ethereum Goerli Testnet):
  - Blocks:
    - base_fee_per_gas (queryable, sortable, aggregatable). Average base fee per day example: https://api.blockchair.com/ethereum/blocks?a=date,avg(base_fee_per_gas)&q=id(12965000..)
    - burned_total (queryable, sortable, aggregatable). Examples:
      - Total ETH burned: https://api.blockchair.com/ethereum/blocks?a=date,sum(burned_total)&q=id(12965000..)
      - Burned to minted ratio by day: https://api.blockchair.com/ethereum/blocks?a=date,f(sum(burned_total)/sum(generation))&q=id(12965000..)
  - Uncles:
    - base_fee_per_gas (queryable, sortable, aggregatable)
  - Transactions:
    - effective_gas_price (queryable, sortable, aggregatable)
    - max_fee_per_gas (null for legacy transactions; queryable, sortable, aggregatable)
    - max_priority_fee_per_gas (null for legacy transactions; queryable, sortable, aggregatable)
    - base_fee_per_gas (base fee of the block; queryable, sortable, aggregatable)
    - burned (calculated as gas_used * base_fee_per_gas; queryable, sortable, aggregatable)
- Added burned and burned_24h to the https://api.blockchair.com/{:eth_chain}/stats dashboard
- Added version field (queryable, aggregatable) to Ethereum transactions. 0 represents legacy transactions, 1 is for EIP-2718 transactions, 2 is for London transactions. In Ethereum terminology this is "type" instead of "version", but as we're already using "type" for another column, we decided to go with "version". Example: https://api.blockchair.com/ethereum/transactions?a=version,count()&q=block_id(12965000..). Please note that for all transactions before block #12965000 it always returns 0, even for EIP-2718 transactions: this will be fixed in one of the next updates.
- Added support for the Ethereum Berlin hard fork. Transactions now have an additional field called type_2718 (queryable) that represents transaction type as outlined in EIP-2718
v.2.0.82 - July 30th, 2021
- Now it's possible to broadcast Cardano transactions using the https://api.blockchair.com/cardano/push/transaction endpoint
- Despite the request cost formulas for infinitables have been set in the documentation since July 19th, 2020, they haven't been effective, and every request to inifintables always cost 1 point. Now the formulas are respected.
- Fixed a bug with the https://api.blockchair.com/{:btc_chain}/addresses infinitable where some balances weren't returned correctly
- Fixed a bug with the https://api.blockchair.com/{:btc_chain}/addresses/balances?addresses={:list} endpoint where some balances weren't calculated correctly
- Fixed some bugs with eCash
v.2.0.81 - July 12th, 2021
- Infinitable enhancements:
  - Intervals are now available for querying time columns. Example usage: https://api.blockchair.com/bitcoin/blocks?q=time(~P1D)&a=count() counts the number of blocks over the last 24 hours, https://api.blockchair.com/ethereum/mempool/transactions?q=time(~PT30S) lists transactions that were included to the Ethereum mempool for the last 30 seconds. Previously users were required to set the interval manually (e.g. ?q=time(2021-07-11 07:58:58..2021-07-12 07:58:58)). The format is an ISO 8601 Duration.
  - New aggregation functions to calculate running totals: runningcount(), runningsum({:column}), runningavg({:column}), runningmedian({:column}), runningmin({:column}), runningmax({:column}). Example usage: https://api.blockchair.com/bitcoin/blocks?a=month,sum(size),runningsum(size) calculates the blockchain size, https://api.blockchair.com/bitcoin/blocks?a=date,avg(size),runningavg(size) calculates the running average for block size, https://api.blockchair.com/bitcoin/blocks?a=year,count(),runningcount() calculates the number of blocks by the end of each year since 2009.
v.2.0.80 - July 8th, 2021
- Database dumps now feature Ethereum addresses, ERC-20 tokens, ERC-20 transfers, Zcash blocks, Zcash transactions, Zcash outputs, Zcash inputs, and Zcash addresses (transparent): https://gz.blockchair.com
- There's a new addresses infinitable for Ethereum: https://api.blockchair.com/ethereum/addresses. The columns are: address, balance, nonce, is_contract. The default sort is by balance descending. Unlike with Bitocin-like addresses infinitables which are updated once every 5 minutes, this infinitable is only updated once a day. The documentation is available here: https://blockchair.com/api/docs#link_310. Some cool examples:
  - https://api.blockchair.com/ethereum/addresses?a=is_contract,count() - count accounts and contracts
  - https://api.blockchair.com/ethereum/addresses?q=balance(1000000..)&a=count() - count the number of addresses hodling more than 1 million ethers
  - Full dump is available here: https://gz.blockchair.com/ethereum/addresses/ (updated daily)
- Stats endpoint for Bitcoin-like chains (https://api.blockchair.com/{:btc_chain}/stats) now includes mempool_outputs.
- BREAKING CHANGE: Bitcoin ABC (which is still in beta status on our platform) is now renamed to eCash and starting from July 19th, 2021 00:00:00 UTC:
  - All API paths will be renamed from bitcoin-abc to ecash (right now both work)
  - All array keys that previously were named bitcoin-abc will be renamed to ecash
  - The prefix for the address format will be changed from bitcoincash: to ecash:
v.2.0.79 - April 23rd, 2021
- Added a new ?events=true option to the https://api.blockchair.com/ethereum/dashboards/transaction/{:hash} endpoint (works with the transactions endpoint as well). This option costs 1 additional request point to use. When enabled, it adds an array of event logs to the output. Every log contains topics, data, contract, log_index, and decoded_event. Depending on how much our API knows about the event signature, there are 3 detalization levels for decoded_event (example transaction with all 3: https://api.blockchair.com/ethereum/dashboards/transaction/0x7d52cf58fe78403e8816dae6e900baff92b35760b4ed81cecd2590eafcde3dad?events=true):
  - Full data: decoded_event contains both the full event name with its argument names (name_full, example: Approval(address owner, address spender, uint256 value)), and the argument values in the arguments array;
  - Partial data: only name_with_types is known (example: Withdrawal(address, uint256)), arguments yields null;
  - No data: decoded_event yields null.
- Added eta_seconds to the https://api.blockchair.com/{:btc_chain}/dashboards/transaction/{:hash}/priority and https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash}/priority endpoints returning an approximate time for the transaction to confirm (in seconds). Please note it's an experimental function and may be unreliable.
- Upgraded Dogecoin infrastructure for better transaction broadcasting
v.2.0.78 - April 17th, 2021
- The ?state=latest option can now also be applied to the Ethereum address dashboard endpoint. If this option is enabled, balance will yield the confirmed balance, and the calls array won't include unconfirmed data. Example: https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address}?state=latest.
- Added a new ?contract_details=true option to the https://api.blockchair.com/ethereum/dashboards/address/{:address}₀ endpoint. If applied, it adds additional data on the address if it's a contract. At the moment, it works with ERC-20 contracts only yielding token_name, token_symbol, and token_decimals. It also yields some additional fields for all contracts: creating_transaction_hash, creating_address, and creating_transaction_time. The additional cost of using this option is 0.5.
- Added hodling_addresses to the https://api.blockchair.com/{:btc_chain}/stats endpoint (stats on Bitcoin-like blockchains) yielding the total number of addresses with positive balance.
- Added market_price_usd, market_price_btc, market_cap_usd to the https://api.blockchair.com/ethereum/erc-20/{:token_address}/stats endpoint. nulls are returned if there's no market data for the specified token.
v.2.0.77 - March 15th, 2021
- Added special statistical endpoints for USDT, USDC, and BUSD. Please note this feature is currently in test mode, there may be compatibility-breaking changes. These endpoints show the distribution of tokens amongst blockchain platforms they are issued on:
  - https://api.blockchair.com/cross-chain/tether/stats for Tether (USDT)
  - https://api.blockchair.com/cross-chain/usd-coin/stats for USD Coin (USDC)
  - https://api.blockchair.com/cross-chain/binance-usd/stats for Binance USD (BUSD)
  - https://api.blockchair.com/stats was also updated to show these stats
v.2.0.76 - March 12th, 2021
- Added a new ?assets_in_usd=true option to the https://api.blockchair.com/ethereum/dashboards/transaction/{:hash} endpoint (works with the transactions endpoint as well). When applied, it adds value_usd_now to all layer_2.erc_20 items yielding the current (not at the moment of the transaction!) USD value of tokens (null if the price is unknown). Example: https://api.blockchair.com/ethereum/dashboards/transaction/0x77025c5c7ff5eeb4bb164a4be84dd49192e12086cc321199f73888830c3ecd9e?erc_20=true&assets_in_usd=true
- Added {:hash}.layer_2.erc_20.{:index}.value_approximate to the https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash} endpoint when using ?erc_20=true option
v.2.0.75 - March 11th, 2021
- Added suggested_transaction_fee_gwei_options to the https://api.blockchair.com/{:eth_chain}/stats endpoint yielding an array of suggested gas prices (sloth if you can take the risk and wait; slow, normal, and fast if you want to get the transaction confirmed within 2-10 minutes; cheetah if you'd like to try to get into the next block).
- The https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash}₀/priority endpoint now supports Ethereum Testnet
v.2.0.74 - March 4th, 2021
- address.nonce now yields 0 instead of null when using the ?nonce=true option with the https://api.blockchair.com/ethereum/dashboards/address/{:address} dashboard for addresses that have made no transactions
- The https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address} endpoint now correctly returns token details when the ?erc_20={:list} option is fed with non-lowered token addresses
- Cardano API enhancements
- Mixin API enhancements
v.2.0.73 - February 26th, 2021
- Added a new ?assets_in_usd=true option to the https://api.blockchair.com/ethereum/dashboards/address/{:address} endpoint. When applied, it adds asset_balance_usd to the output yielding the total USD value of all account assets (currently it's most popular ERC-20 tokens only), as well as balance_usd to all layer_2.erc_20 items.
- Fixed wrong nonce values for some Ethereum transactions
- The https://api.blockchair.com/premium/stats?key={:api_key} now yields request points instead of raw requests in requests_today
- The https://api.blockchair.com/{:eth_chain}/push/transaction endpoint now yields a more detailed error description (context.error) in case the broadcast fails (e.g. nonce too low, insufficient funds for gas * price + value or already known)
v.2.0.72 - December 18th, 2020
- Added an ability to retrieve internal calls for unconfirmed Ethereum transactions. Usage: https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash}?trace_mempool=true. It's also possible to retrieve the list of ERC-20 transfers for mempool transactions: https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash}?trace_mempool=true&erc_20=true. This is an experimental feature. Please note that internal transfers may get invalidated when transaction gets confirmed.
- The https://api.blockchair.com/{:eth_chain}/dashboards/transaction/{:hash} dashboard is now more efficient at handling recently (1-30 seconds ago) confirmed transactions
- Updated list of Bitcoin mining pools
- Fixed some issues with Bitcoin ABC
v.2.0.71 - December 14th, 2020
- Improved Dogecoin transaction broadcasting
- Added ?output=type option to the https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address} dashboard. When this option is enabled, only address type (account or contract) is returned. This may be a very fast handy way instead of requesting full address data. Example: https://api.blockchair.com/ethereum/dashboards/address/0x00000000219ab540356cbb839cbe05303d7705fa?output=type.
- Fixed a bug where the https://api.blockchair.com/{:btc_chain}/raw/transaction/{:hash} endpoint returned code 200 even if there was a back end error
- Fixed GitHub issue #320 ("No data returned for address balance mass check for some bitcoin-cash addresses", Blockchair#320)
- Added new nodes to the Release monitor: Bitcoin Cash Node for Bitcoin Cash, Cardano Node for Cardano
v.2.0.70 - November 17th, 2020
- We're introducing News aggregator API! Starting today not only Blockchair API provides you with blockchain data, but also with some crypto news to integrate into your app. We're aggregating data from more than 60 news outlets in 14 languages, populating over 35,000 headlines into our database a month. Documentation: https://blockchair.com/api/docs#link_M7. Want your media outlet to be included to the aggregator? Please contact us at info@blockchair.com!
v.2.0.69 - November 16th, 2020
- ERC-20 tokens in the https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address}?erc_20={approximate|precise|{:list}} endpoint are now sorted by their market capitalization descending (so the most popular ones are on top now)
- It's now possible to aggregate the Ethereum transactions infinitable (https://api.blockchair.com/ethereum/transactions) and the Ethereum calls infinitable (https://api.blockchair.com/ethereum/calls) by sender and recipient (the same applies for the Ethereum testnet). Example: show top 100 stakers of the eth2 contract (by number of deposits): https://api.blockchair.com/ethereum/calls?q=recipient(0x00000000219ab540356cbb839cbe05303d7705fa),failed(false)&limit=100&a=sender,count()&s=count()(desc)
v.2.0.68 - November 10th, 2020
- Added an experimental ?effects=true option to the https://api.blockchair.com/ethereum/dashboards/transaction/{:hash} dashboard. Example: https://api.blockchair.com/ethereum/dashboards/transaction/0xd9a24f57c713207c39c58e8ef3cb44e115fcc8bd0f85eb4ea82c78bc065a723f?effects=true&erc_20=true. effects array yields the list of all changes to ETH and ERC-20 token balances.
- Added an experimental endpoint to retrieve allowance for ERC-20 contracts: https://api.blockchair.com/ethereum/erc-20/{:token_address}/utils/allowance?owner={:owner_address}&spender={:spender_address}. Example: https://api.blockchair.com/ethereum/erc-20/0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2/utils/allowance?owner=0x448bb00f370da5af5d33d3e7fca686379fc782ea&spender=0xe0e6b25b22173849668c85e06bc2ce1f69baff8c
- The https://api.blockchair.com/{:eth_chain}/dashboards/address/{:address} dashboard now has 3 options to retrieve ERC-20 balances:
  - ?erc_20=approximate (or ?erc_20=true, default) - yields all token balances from our database. These values may miss some non-standard transfers in tokens that don't follow the ERC-20 standard in full. Please double-check if this option returns correct values for the tokens you'd want to get information about. Using this option costs 1.
  - ?erc_20=precise - yields all token balances from our node. The process is the following: we gather information from our database about potential ERC-20 tokens the address may hold, and then for each token we call getBalance function using our node to get precise balances. Please note that if for some reason some contract doesn't follow the ERC-20 standard, our database may still miss records about the address holding this token, and there will be no request to the node about this token. So while balances yielded with this option are precise, some non-standard tokens may still be missed. Using this option costs 2.
  - ?erc_20={:token_address}₀,...,{:token_address}ᵩ (recommended) - yields balances for the enlisted ERC-20 tokens from our node. That's the recommended way if you have an exact list of tokens you'd like to check. Even if some token doesn't follow the ERC-20 standard, but still has getBalance function implemented, the correct balance will be returned. Using this option costs 0.75 + 0.01 for each contract checked (the cheapest option!)
- Improved efficiency of the https://api.blockchair.com/ethereum/erc-20/{:token_address}/stats endpoint
- Fixed a bug with cUSDT Ethereum contract
- Fixed some missing ERC-20 transfers
v.2.0.67 - November 6th, 2020
- Added Bitcoin ABC (Bitcoin Cash ABC) support. Please read our statement on the upcoming Bitcoin Cash split: https://twitter.com/Blockchair/status/1324424632179576832. Also please note that it is expected that Bitcoin ABC's hashrate will be very low so 51% attacks are possible. We'll be running Bitcoin ABC in beta mode and we don't guarantee neither its stability, nor that we'll run it if the chain won't be used by businesses.
v.2.0.66 - September 23rd, 2020
- We've upgraded our Ethereum engine - blocks, transactions, and ERC-20 transfers are now processed more than 10 times faster.
- Added Ethereum Goerli testnet: https://blockchair.com/ethereum/testnet (API endpoints are the same as for Ethereum, just use ethereum/testnet instead of ethereum; ERC-20's are also supported for the testnet).
v.2.0.65 - August 27th, 2020
- Fixed wrong nonce values for Ethereum transactions. nonce field now yields correct integers (thanks to Linmin Li for noticing this bug).
v.2.0.64 - July 19th, 2020
- Added ?transaction_details=true option to https://api.blockchair.com/{:btc_chain}/dashboards/addresses/{:address}₀,...,{:address}ᵩ and https://api.blockchair.com/{:btc_chain}/dashboards/xpub/{:extended_key} endpoints. The additional cost for using this option is 1. See its description in the v.2.0.37 changelog or in the documentation. Usage example: https://api.blockchair.com/bitcoin/dashboards/xpub/xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz?transaction_details=true
- New https://api.blockchair.com/multi/dashboards/addresses/{:address}₀,...,{:address}ᵩ endpoint to check addresses from multiple blockchains at once. Supported blockchains: all Bitcoin-like blockchains and Ethereum. The maximum number of addresses is 100. See the documentation: https://blockchair.com/api/docs#link_391
- Previously announced request cost formulas now come into full effect.
v.2.0.63 - July 8th, 2020
- Added is_rbf field to https://api.blockchair.com/bitcoin/dashboards/transaction/{:hash} and https://api.blockchair.com/bitcoin/dashboards/transactions/{:hash}₀,...,{:hash}ᵩ endpoints. It yields true if the transaction can be replaced with a transaction with a higher fee (replace-by-fee), and false otherwise. For blockchain transactions it shows whether the transaction could've been replaced before it has been included into the block. Available for Bitcoin Testnet as well.
- Fixed a bug with Tezos when API returned error 500 for blocks with no transactions
v.2.0.62 - July 2nd, 2020
- We're happy to announce that Groestlcoin support has been extended up to at least January 1st, 2021.
- https://api.blockchair.com/{:eos_chain}/raw/account/{:address} endpoint now has ?actions=true option showing the last 10 actions for account
- All EOS endpoints now have context.price_usd showing the USD price of EOS.
- Fixed a bug where it wasn't possible to submit a transaction that is larger than 32 kB in size for broadcast (thanks to Koval for noticing that). Just a reminder, the transaction size still shouldn't be more than ~100 kB as it makes it non-standard and it won't be relayed by nodes.
- The https://api.blockchair.com/{:btc_chain}/addresses/balances endpoint now works more stable.
v.2.0.61 - Jun 24th, 2020
- We're launching Privacy-o-meter - a tool to highlight transactions privacy issues. See the most detailed documentation: https://blockchair.com/api/docs#link_M6
- https://api.blockchair.com/{:btc_chain}/dashboards/transaction/{:hash}₀ and https://api.blockchair.com/{:btc_chain}/dashboards/transactions/{:hash}₀,...,{:hash}ᵩ now yield coinbase_data_hex for coinbase transactions if ?privacy-o-meter=true option is set.
v.2.0.60 - Jun 19th, 2020
- New way to fetch balances for multiple addresses: https://api.blockchair.com/{:btc_chain}/addresses/balances (POST or GET) with addresses key in a POST request (or ?addresses={:list} in a GET request) as a comma-separated list of addresses (up to 25.000 at once). This endpoint returns confirmed balances only. If address hasn't been recorded on the blockchain or has a balance of zero, it won't be displayed in the results. This endpoint is extremely fast (under 1 second for 25.000 addresses) and cheap (it costs only 26 request points to fetch 25.000 addresses). See documentation here: https://blockchair.com/api/docs#link_390 (supported chains: Bitcoin, Bitcoin Cash, Bitcoin SV, Litecoin, Dash, Zcash, Dogecoin, Groestlcoin)
- On Oct 26th, 2019 with v.2.0.38 we announced the "request cost" concept by which some requests cost more than others (i.e. requesting the data on 10 transactions costs more than requesting it for just 1 transaction, but since the request is done in bulk, it is cheaper for the API user in the end). Up until now we didn't enforce that policy counting each request as 1.
  - Starting July 19th, 2020 at 00:00 UTC we'll start enforcing this rule
  - As this is a somewhat compatibility-breaking change, we activate context.api.next_major_update and set it to 2020-07-19 00:00:00 (see General Provisions for our policy on compatibility-breaking changes)
  - context array for all requests now has the request_cost field yielding the request cost
  - Premium API clients can track thier usage using the control panel. If you have any questions, you can always reach us at <info@blockchair.com>
v.2.0.59 - Jun 18th, 2020
- Enhancements for Tezos:
  - New blocks infinitable: https://api.blockchair.com/tezos/raw/blocks
  - context array for every API call to the Tezos blockchain now has price_usd element returning the current USD price of Tezos
v.2.0.58 - Jun 13th, 2020
- Added EOS support. Please note we're not running a full history EOS node at the moment, so our API shows the most recent blocks and transactions only. New endpoints:
  - https://api.blockchair.com/eos/stats
  - https://api.blockchair.com/eos/raw/block/{:id}
  - https://api.blockchair.com/eos/raw/transaction/{:hash}
  - https://api.blockchair.com/eos/raw/account/{:address}
v.2.0.57 - Jun 5th, 2020
- We now show multisig types for P2SH and P2WSH addresses. The type has the following format: multisig_{:m}_of_{:n}. If the script is not P2SH or P2WSH multisig, the type is null. Affected endpoints:
  - https://api.blockchair.com/{:btc_chain}/dashboards/address/{:address} now has the scripthash_type field (example: https://api.blockchair.com/bitcoin/dashboards/address/37cmSuMp7CuLDhjYkNJiTSewmbPuv8RBt1). If address hasn't been seen spending, it's not possible to derive the multisig type, and scripthash_type will be null.
  - https://api.blockchair.com/{:btc_chain}/dashboards/transaction/{:hash}₀ and https://api.blockchair.com/{:btc_chain}/dashboards/transactions/{:hash}₀,...,{:hash}ᵩ now have scripthash_type field for inputs and outputs (example: https://api.blockchair.com/bitcoin/dashboards/transaction/4d41241148a7cb8f4e2820d4393415ccd3d0793053a3855b44c33e5053c231ff). Please note that if output is unspent, scripthash_type will always be null, even if the associated address multisig type can be derived from some other spent output.
- Fixed bug in the https://api.blockchair.com/{:btc_chain}/mempool/outputs infinitable where spending_witness returned values in an incorrect format for SegWit-enabled chains (this closes Issue #157)
v.2.0.56 - Jun 4th, 2020
- Improved the https://api.blockchair.com/{:btc_chain}/dashboards/xpub/{:extended_key} endpoint response time when requesting the same xpub for the second and subsequent times -- we now cache the minimum number of needed derivation cycles (e.g. now if an xpub contains 59 addresses on the first request API goes through 3 cycles -- 20 addresses each -- and then remembers that there are at least 60 addresses should be checked -- and on subsequent requests these 60 addresses will be checked using 1 database request instead of 3.
- Fixed API returning error 500 for very large xpubs
- Improved Cardano explorer stability
- Improved https://api.blockchair.com/{:chain}/stats and https://api.blockchair.com/stats endpoints response time
v.2.0.55 - May 28th, 2020
- Added circulation and circulation_approximate fields to the https://api.blockchair.com/ethereum/erc-20/{:token}/stats endpoint output. These values yield total circulating supply of the token (null if the contract doesn't have the totalSuply function).
- Fixed a precision issue in the https://api.blockchair.com/ethereum/erc-20/{:contract}/dashboards/address/{:address} endpoint, now balance returns precise value.
- Added ?nonce=true option to the https://api.blockchair.com/ethereum/dashboards/address/{:address} endpoint. If enabled, nonce will yield account's current transaction nonce.
v.2.0.54 - May 27th, 2020
- The limit on xpub discovery is raised to 20.000 (10.000 main addresses and 10.000 change addresses) for Premium API customers. Please note that according to the request cost formula for xpub endpoints, the cost of fetching an xpub consisting of 10.000 addresses is 1 + 2 * (10000 / 20) - 0.1 = 1000.9
- Fixed a bug with complex aggregation queries. Now instead throwing a 500 error, the following example works: https://api.blockchair.com/bitcoin/transactions?q=has_witness(true),has_witness(false),time(2020-05),input_count(1),output_count(1),is_coinbase(false)&a=date,f(avg(fee)/avg(fee))&aq=0:0;1:1 (this particular example returns data on how many times more SegWit transactions with a single input and a single outputs pay in fees on average).
- https://api.blockchair.com/{:chain}/push/transaction endpoint now returns a detailed error description in the context.error field in case you're trying to submit a malformed transaction. This is not yet available for Ethereum.
- In addition to POST, https://api.blockchair.com/{:chain}/push/transaction endpoint now works using GET as well. Example usage: https://api.blockchair.com/{:chain}/push/transaction?data={:raw_transaction}. Available for all cryptos we support.
v.2.0.53 - May 26th, 2020
- Improved stability of our Omni Layer explorer
- The https://api.blockchair.com/bitcoin/dashboads/transaction/{:hash}?omni=true endpoint now returns info for unconfirmed Omni Layer transfers. In case there are any, the valid field will yield null. Please note that it's not possible to know if an Omni Layer transfer is valid before it has at least 1 confirmation.
v.2.0.52 - May 22th, 2020
- Fixed a bug where it wasn't possible to filter Ethereum mempool tables by sender and recipient (thanks @emilianobonassi for noticing)
- https://api.blockchair.com/{:btc_chain}/dashboards/transaction/{:hash}/priority endpoint now yields confirmed in the position field for confirmed transactions. Previously it wasn't possible to differ confirmed transactions from transactions that have completely fallen out of the mempool.
v.2.0.51 - May 14th, 2020
- Added Tezos support. New endpoints:
  - https://api.blockchair.com/tezos/stats
  - https://api.blockchair.com/tezos/raw/block/{:id|hash}
  - https://api.blockchair.com/tezos/raw/operation/{:hash}
  - https://api.blockchair.com/tezos/raw/account/{:account|contract}
v.2.0.50 - May 13th, 2020
- Removed support for Telegram Open Network (TON) as the project has been shut down (see https://telegra.ph/What-Was-TON-And-Why-It-Is-Over-05-12). All the relevant endpoints will now return a 404 error.
v.2.0.49 - April 26th, 2020
- It's now possible to discard unconfirmed transactions from the address dashboard by applying ?state=latest option. If this option is applied, balance will show only confirmed balance, and transactions and utxo arrays won't include unconfirmed data. Affected endpoints ({:btc_chain} can be one of these: bitcoin, bitcoin-cash, litecoin, bitcoin-sv, dogecoin, dash, groestlcoin, zcash, bitcoin/testnet):
  - https://api.blockchair.com/{:btc_chain}/dashboards/address/{:address}₀?state=latest
  - https://api.blockchair.com/{:btc_chain}/dashboards/addresses/{:address}₀,...,{:address}ᵩ?state=latest
  - https://api.blockchair.com/{:btc_chain}/dashboards/xpub/{:extended_key}?state=latest
v.2.0.48 - April 22nd, 2020 (Lenin turns 150 today!)
- Added Mixin support. The list of new endpoints (see the documentation for details):
  - https://api.blockchair.com/mixin/stats
  - https://api.blockchair.com/mixin/raw/snapshots
  - https://api.blockchair.com/mixin/raw/mintings
  - https://api.blockchair.com/mixin/raw/nodes
  - https://api.blockchair.com/mixin/raw/graph
  - https://api.blockchair.com/mixin/raw/snapshot/{:hash}
  - https://api.blockchair.com/mixin/raw/snapshot/{:id}
  - https://api.blockchair.com/mixin/raw/transaction/{:hash}
  - https://api.blockchair.com/mixin/raw/round/{:hash}
  - https://api.blockchair.com/mixin/raw/round/({:id},{:node_hash})
  - https://api.blockchair.com/mixin/raw/node/{:node_hash}
  - https://api.blockchair.com/mixin/push/transaction
v.2.0.47 - March 12th, 2020
- Added Zcash support. Features: dashboard endpoints, raw endpoints, infinitables (allowing to filter and sort blockchain data), node explorer, and many more.
v.2.0.46 - March 3rd, 2020
- There's a new interface for our Premium API users available at https://api.blockchair.com/premium. It's now possible to buy and extend a subscription using this interface as well as to track some basic stats. Subscription extending is not available for existing customers with custom plans, please contact us at info@blockchair.com if you'd like to have an automated interface.
v.2.0.45 - February 6th, 2020
- New endpoint to track halvening events: https://api.blockchair.com/tools/halvening. Documentation: https://blockchair.com/api/docs#link_511
v.2.0.44 - January 28th, 2020
- New endpoint to track new reference node software releases: https://api.blockchair.com/tools/releases. This endpoint returns the list of latest software (core clients) releases for blockchains we support. This may be useful for those who want to track blockchain development, new features, and hard forks (especially this is useful for multi-currency blockchain software — wallets or exchanges — developers). Never miss a BSV hard fork anymore! Documentation: https://blockchair.com/api/docs#link_510
v.2.0.43 - January 23rd, 2020
- Added alpha support for Cardano (ADA). Here's the list of new endpoints (please refer to our documentation for more info: https://blockchair.com/api/docs):
  - https://api.blockchair.com/cardano/stats
  - https://api.blockchair.com/cardano/raw/block/{:id|hash}
  - https://api.blockchair.com/cardano/raw/transaction/{:hash}
  - https://api.blockchair.com/cardano/raw/address/{:address}
v.2.0.42 - January 20th, 2020
- New endpoint to query the range of available blocks in blockchains we support: https://api.blockchair.com/range. Note that at this moment we don't store full historical data for Ripple and Stellar, so this endpoint is useful when you need to know which blocks can be queried.
v.2.0.41 - January 18th, 2020
- Added alpha support for Monero. Here's the list of new endpoints (please refer to our documentation for more info: https://blockchair.com/api/docs):
  - https://api.blockchair.com/monero/stats
  - https://api.blockchair.com/monero/raw/block/{:id|hash}
  - https://api.blockchair.com/monero/raw/transaction/{:hash}
  - https://api.blockchair.com/monero/raw/outputs?{:query}
v.2.0.40 - December 3rd, 2019
- Added alpha support for Telegram Open Network (TON). Here's the list of new endpoints (please refer to our documentation for more info: https://blockchair.com/api/docs):
  - https://api.blockchair.com/ton/testnet/stats
  - https://api.blockchair.com/ton/testnet/raw/ledger/{:tuple}
  - https://api.blockchair.com/ton/testnet/raw/transaction/{:tuple}
  - https://api.blockchair.com/ton/testnet/raw/account/{:address}
v.2.0.39 - Nov 1st, 2019
- Added alpha support for Stellar (XLM). Here's the list of new endpoints (please refer to our documentation for more info: https://blockchair.com/api/docs):
  - https://api.blockchair.com/stellar/stats
  - https://api.blockchair.com/stellar/raw/ledger/{:id}
  - https://api.blockchair.com/stellar/raw/transaction/{:hash}
  - https://api.blockchair.com/stellar/raw/account/{:address}
v.2.0.38 - Oct 26th, 2019
- We've published new documentation for our API which is lots more clear and describes all the functions we have, it's now available here: https://blockchair.com/api/docs
- Changes to the Omni Layer and Wormhole support (as they're in Alpha test mode these are compatibility-breaking changes; we'll be bringing Omni to Stable the next year):
  - As Wormhole as a protocol isn't used anymore, we'll shut it down on our platform on January 1st, 2020
  - Retrieving infomation about Omni Layer transfers within a Bitcoin transaction now requires a ?omni=true parameter
  - Retrieving infomation about Wormhole transfers within a Bitcoin Cash transaction now requires a ?wormhole=true parameter
  - Retrieving infomation about Omni Layer token balances of a Bitcoin address now requires a ?omni=true parameter
  - Retrieving infomation about Wormhole token balances of a Bitcoin Cash transaction now requires a ?wormhole=true parameter
  - Data is now yielded in layer_2.omni and layer_2.wormhole arrays instead of _omni and _wormhole
- Changes to Ripple endpoints (they're in Alpha test mode as well):
  - https://api.blockchair.com/{:xrp_chain}/dashboards/ledger/{:hash|id}₀ is now https://api.blockchair.com/{:xrp_chain}/raw/ledger/{:hash|id}₀
  - https://api.blockchair.com/{:xrp_chain}/dashboards/transaction/{:hash}₀ is now https://api.blockchair.com/{:xrp_chain}/raw/transaction/{:hash}₀
  - https://api.blockchair.com/{:xrp_chain}/dashboards/account/{:address}₀ is now https://api.blockchair.com/{:xrp_chain}/raw/account/{:address}₀
- Added block_id property to the output of the ?transaction_details=true param introduced in v.2.0.37 - it's now easier to count the number of confirmations. Also a small bug has been fixed with the timestamps (thanks to Maxim Chistov for noticing)
- We're introducing the "request cost" concept (full description is available in our new documentation; basically, the idea is that some of API requests will cost more than others). We'll not be forcing this rule at the moment, the launch date will be announced later. That won't affect our existing API customers until the end of their subscription periods.
v.2.0.37 - Oct 9th, 2019
- {:chain}/dashboards/address/{:address} endpoint now has an optional parameter ?transaction_details=true which allows you to retrieve transaction details in the transactions array instead of just transaction hashes. Each transactions array element contains the following values:
  - hash - transaction hash
  - time - transaction timestamp (UTC)
  - balance_change - how the transaction affected the balance of {:address}
Appending a request with ?transaction_details=true makes it count as 2 separate requests in the matter of API limits (including Premium API).

Usage example: https://api.blockchair.com/bitcoin/dashboards/address/12cbQLTFMXRnSzktFkuoG3eHoMeFtpTu3S?transaction_details=true

This option is supported for Bitcoin, Bitcoin Cash, Litecoin, Dash, Bitcoin SV, Dogecoin, and Groestlcoin only.
v.2.0.36 - Sep 17th, 2019
- We begin a public beta test of ERC-20 support on our platform. Over 100.000 tokens are available to explore!
  - New ERC-20 endpoints:
    - ERC-20 tokens infinitable: https://api.blockchair.com/ethereum/erc-20/tokens
    - ERC-20 transactions infinitable: https://api.blockchair.com/ethereum/erc-20/transactions (example: https://api.blockchair.com/ethereum/erc-20/transactions?q=token_address({:token_address}) - filter transactions by a specific token). These two infinitables act as other infinitables in our API, i.e. it's possible to sort and filter by many params, to paginate, etc.
    - ERC-20 token stats dashboard: https://api.blockchair.com/ethereum/erc-20/{:token_address}/stats - returns some basic stats about a token
    - ERC-20 token holder dashboard: https://api.blockchair.com/ethereum/erc-20/{:token_address}/dashboards/address/{:address} - returns info about a token holder (the balance, list of latest transactions, etc.)
  - New options and changes to the existing Ethereum dashboards:
    - Ethereum transaction dashboard: https://api.blockchair.com/ethereum/dashboards/transaction/{:transaction_hash}?erc_20=true - returns info about a transaction including ERC-20 transfers
    - Ethereum address dashboard: https://api.blockchair.com/ethereum/dashboards/address/{:address}?erc_20=true - returns info about an address including its ERC-20 token balances (tip: addresses and hashes should start with 0x)
    - Ethereum stats dashboards (https://api.blockchair.com/ethereum/stats) now have data.layer_2.erc_20 key yielding basic stats on ERC-20's: the total number of tokens, the total number of transactions, and the number of new tokens and transactions over the last 24 hours.
    - For all Ethereum endpoints there's a new key context.state_layer_2 which yields the latest processed block number. It can be different from context.state as it takes some time to process second layer transactions.
  Please note these endpoints are in beta, so there may be some unannounced compatibility-breaking changes. More detailed documentation will come later this month. Appending ?erc_20=true to requests makes it counted as 2 separate requests in the matter of API limits (including Premium API).
v.2.0.35 - Sep 11th, 2019
- api.blockchair.com/{:chain}/nodes endpoint now also returns the heights array showing distribution of the latest block numbers among nodes. See a visualisation on our web interface as an example: https://blockchair.com/bitcoin/nodes
- There's a new endpoint api.blockchair.com/nodes showing some aggregated node stats across 7 networks (Bitcoin, Bitcoin Cash, Bitcoin SV, Litecoin, Dash, Dogecoin, and Groestlcoin).
- Our database dumps now also feature daily balances snapshot, see Bitcoin for example: https://gz.blockchair.com/bitcoin/addresses/ (please note that the download speed is limited for non-premium users). The format is address<TAB>balance.
v.2.0.34 - Aug 7th, 2019
- It's now possible to retrieve raw block data directly from our nodes. The endpoint is api.blockchair.com/{:chain}/raw/block/{:hash}|{:id}. This endpoint supports all chains except for ripple.
  - For Bitcoin-like chains the data array returns two elements:
    - raw_block - contains hex representation of the block
    - decoded_raw_block - contains json representation of the block that is generated by our node
  - For Ethereum only decoded_raw_block is available
  Please note that these endpoints are for development usage only. The result is returned directly from our nodes, so we can't guarantee backward compatibility in case we upgrade our nodes. For production, please use the api.blockchair.com/{:chain}/dashboards/block/{:hash}|{:id} endpoint - it pulls data from our databases.
- Ethereum uncles now have an id property (previously they only had parent_block_id, index, and hash properties as identifiers). This affects api.blockchair.com/ethereum/dashboards/uncle/{:hash} and api.blockchair.com/ethereum/uncles?{:params} endpoints. Please note that id is not a unique identifier for an uncle (use hash or parent_block_id:index instead).
- Fixed a bug where api.blockchair.com/{:chain}/dashboards/addresses/{:address},{:address},... endpoint returned 500 if ?limit=0 was applied
- context.state doesn't return the latest block number anymore in case API returns an error (400, 402, 404, etc.)
v.2.0.33 - Jul 23rd, 2019
- According to the Bitcoin SV roadmap we've upgraded our nodes to support the Quasar upgrade
- BREAKING CHANGE: Upon popular request (#161, #162, #193, #196, #211, and others), starting July 29th 00:00:00+0000 we're switching to the legacy address format for Bitcoin SV. This will affect the output of the following endpoints:
  - api.blockchair.com/bitcoin-sv/dashboards/transaction/{:hash}
  - api.blockchair.com/bitcoin-sv/dashboards/transactions/{:hash},{:hash},...
  - api.blockchair.com/bitcoin-sv/dashboards/address/{:address} (it will be still possible to use CashAddr in the query string)
  - api.blockchair.com/bitcoin-sv/dashboards/addresses/{:address},{:address},... (the same)
  - api.blockchair.com/bitcoin-sv/dashboards/xpub/{:[xyz]pub}
  - api.blockchair.com/bitcoin-sv/outputs?{:params}
  - api.blockchair.com/bitcoin-sv/mempool/outputs?{:params}
  - api.blockchair.com/bitcoin-sv/addresses?{:params}
  - api.blockchair.com/bitcoin-sv/state/changes/block/{:block_id)
  - api.blockchair.com/bitcoin-sv/state/changes/mempool
v.2.0.32 - Jul 15th, 2019
- We're launching Bitcoin Testnet support for developers! All the functions available for Bitcoin are now available for Bitcoin Testnet as well, including:
  - Filtering and sorting blockchain data using infinitables (api.blockchair.com/bitcoin/testnet/blocks, api.blockchair.com/bitcoin/testnet/transactions, api.blockchair.com/bitcoin/testnet/outputs, api.blockchair.com/bitcoin/testnet/mempool/transactions, api.blockchair.com/bitcoin/testnet/mempool/outputs, and api.blockchair.com/bitcoin/testnet/addresses), including aggregation capabilities
  - Dashboards (api.blockchair.com/bitcoin/testnet/dashboards/block/{:id|hash}, api.blockchair.com/bitcoin/testnet/dashboards/blocks/{:id|hash},{:id|hash},..., api.blockchair.com/bitcoin/testnet/dashboards/transaction/{:hash}, api.blockchair.com/bitcoin/testnet/dashboards/transactions/{:hash},{:hash},...), api.blockchair.com/bitcoin/testnet/dashboards/address/{:address}, api.blockchair.com/bitcoin/testnet/dashboards/addresses/{:address},{:address},..., api.blockchair.com/bitcoin/testnet/dashboards/xpub/{:[xyz]pub}
  - Broadcasting transactions (api.blockchair.com/bitcoin/testnet/push/transaction)
  - State changes (api.blockchair.com/bitcoin/testnet/state/changes/block/{:block_id) and api.blockchair.com/bitcoin/testnet/state/changes/mempool)
  - Stats (api.blockchair.com/bitcoin/testnet/stats)
  See documentation for Bitcoin for more details. Please note that USD countervalue for testnet coins is always 0. In the future we also plan to launch support for Bitcoin Cash and Ethereum testnets.
- outputs.type column for SegWit-coins can now yield witness_unknown type
- blocks.generation column for Bitcoin-like coins can now yield negative values in case there are transaction fees, but the output for the coinbase transaction is less than the sum of the fees
- The utxo array in the {:chain}/dashboards/xpub/{[xyz]pub} dashboard now shows which utxo belongs to which addresses (now it's identical to {:address1}[,{:address2}…])
v.2.0.31 - Jul 5th, 2019
- Added two new keys to bitcoin/stats and litecoin/stats calls:
  - next_retarget_time_estimate yields an estimated timestamp of the next difficulty retarget
  - next_difficulty_estimate yeilds an estimated next difficulty value
  These keys are available for Bitcoin and Litecoin as other cryptos we support recalculate difficulty every block.
v.2.0.30 - Jul 4th, 2019
- We're adding a new table called addresses containing the list of all addresses and their confirmed balances to all Bitcoin-like coins (Bitcoin, Bitcoin Cash, Litecoin, Dash, Bitcoin SV, Dogecoin, Groestlcoin). Unlike other "infinitables" (blocks, transactions, outputs) this table isn't live, it's automatically updated every 5 minutes, thus we're classifying it as an "infiniview", meaning it's not really a table, but a view over the outputs table. See the documentation for this table. Here are some examples of how it can be used:
  - api.blockchair.com/bitcoin/addresses - show Bitcoin addresses with biggest balances (i.e. the rich list)
  - api.blockchair.com/bitcoin/addresses?q=balance(100000000) - show Bitcoin addresses having exactly 1 BTC on their balance
  - api.blockchair.com/bitcoin/addresses?a=count() - count the number of addresses with a non-zero balance
  - api.blockchair.com/bitcoin/addresses?a=count()&q=balance(100000000..) - count the number of addresses holding at least 1 BTC
  - api.blockchair.com/bitcoin/addresses?a=sum(balance)&q=balance(100000000..) - calculate how many bitcoins do the addresses from the previous example hold
  - api.blockchair.com/bitcoin/addresses?a=median(balance) - calculate the median balance
  Using this table makes it trivial to build various sorts of rich lists. It's now also possible to retrieve a full list of addresses and balances in one file (available only in our Private API solution). Please note that this table shouldn't be used for retrieving balances for a particular set of addresses, please use the api.blockchair.com/{:chain}/dashboards/addresses/{:addr1}[,{:addr2}...] dashboard endpoint instead.
v.2.0.29 - Jun 30th, 2019
- The State changes feature now supports requesting potential state changes caused by mempool transactions. The endpoint is https://api.blockchair.com/{:chain}/state/changes/mempool. It's now possible to easily build an app watching for transactions incoming/outgoing to/from millions of addresses, see an example.
v.2.0.28 - Jun 28th, 2019
- Added support for Groestlcoin nodes. The endpoint is https://api.blockchair.com/groestlcoin/nodes. The stats endpoint (https://api.blockchair.com/groestlcoin/stats) now also shows the node count.
v.2.0.27 - Jun 27th, 2019
- Effective July 19th, there will be a new policy on using our Public API for both non-commercial and commercial projects. Please see Applying for an API key first and apply for an API key before July 19th! Since this is a major compatibility-breaking change, context.api.next_major_update is set to 2019-07-19 18:07:19 (see General Provisions)
- Removed ethereum.uncles.total_difficulty column according to ethereum/go-ethereum#19024
v.2.0.26 - Jun 20th, 2019
- Added utxo array showing available unspent transaction outputs for Bitcoin-like coins to the following endpoints:
  - api.blockchair.com/{:chain}/dashboards/address/{:address}
  - api.blockchair.com/{:chain}/dashboards/addresses/{:address1}[,{:address2}…]
  - api.blockchair.com/{:chain}/dashboards/xpub/{:[xyz]pub}
  Each array element has the following structure:
  - block_id - block number (-1 for unconfirmed outputs)
  - transaction_hash - transaction hash
  - index - output index in the transaction (also known as the vout number)
  - value - output value in satoshi
  - address (only for addresses and xpub dashboards) - showing the output owner
  This new functionality DEPRECATES usage of an old method to retrieve the UTXO set for an address, namely api.blockchair.com/{:chain}/outputs?q=recipient({:address}),is_spent(false). See the discussion with some examples here: Blockchair#192
- The 3 above listed endpoints now also have a new way to iterate through the transaction list and the UTXO set. It's now possible to use ?limit=A,B and ?offset=C,D sections in the query. The first number affects the transaction list, the second number affects the UTXO set. If only one number is set, it affects both. The default limit is 100. The maximum limit is 10000. The default offset is 0. The maximum offset is 1000000. Here are some examples:
  - api.blockchair.com/{:chain}/dashboards/address/{:address} - shows address data with an array of 100 latest transactions and 100 latest UTXOs
  - api.blockchair.com/{:chain}/dashboards/address/{:address}?limit=0 - if you require just some general stats like the address balance
  - api.blockchair.com/{:chain}/dashboards/address/{:address}?limit=0,100 - if you need just the general stats and the UTXO set
  - api.blockchair.com/{:chain}/dashboards/address/{:address}?limit=100,0 - if you need just the general stats and the transaction list
  - api.blockchair.com/{:chain}/dashboards/address/{:address}?limit=100,0&offset=100,0 - ... and to iterate it
- The api.blockchair.com/{:chain}/dashboards/block/{:hash}|{:id} endpoint now also has an iterable set of transaction hashes included in the block. The default limit is 100. The maximum limit is 10000. The default offset is 0. The maximum offset is 1000000. This feature implements Blockchair#189
v.2.0.25 - Jun 19th, 2019
- Added Groestlcoin support (it has SegWit support, so all API functionality available for Bitcoin and Litecoin is available for Groestlcoin as well).
- Added suggested_transaction_fee_per_byte_sat key to {:chain}/stats calls. This value shows a good enough approximation of an optimal fee value suggested by our engine based on the current mempool state (in satoshi per byte) to get into the next block. Please note that for transactions less important for you this fee suggestion may be too high, while for very important transactions it may not be enough if you'll get unlucky because of the lack of new blocks. Supported for all coins except for Ripple and Ethereum for which we'll have a separate value suggesting an appropriate gas price value.
- Updated xpub support to v.b5 (see xpub support in the docs: two bugs have been fixed);
v.2.0.24 - Jun 6th, 2019
- Added an optional countdowns array to {:chain}/stats calls. If present, this array contains information about various upcoming events such as hard forks or reward halvings. There are two keys for each event: event which contains event description, and time_left showing how many seconds are left until the event occurs. Please note that the number of seconds is an approximate value because most events are triggered after a block at a specific height is mined, and since it's not possible to know for sure when a block becomes mined, we can only approximate that.
v.2.0.23 - May 24th, 2019
- Added support for Dash nodes. The endpoint is https://api.blockchair.com/dash/nodes. The stats endpoint (https://api.blockchair.com/dash/stats) now also shows the node count.
- It's now possible to query Dash xpubs (see xpub support in the docs)
- Dash is now out of beta on our platform
v.2.0.22 - May 23rd, 2019
- The state changes feature introduced in v.2.0.20 is now available for Ethereum. The endpoint is https://api.blockchair.com/ethereum/state/changes/block/{:block_id}. Please note that it shows only the balance changes caused by a block. Values are returned as strings because some wei values don't fit into int64.
- Some optimizations to the Ethereum mempool processing - we now show a lot more unconfirmed transactions
v.2.0.21 - Apr 22nd, 2019
- We've added an ability to query multiple addresses at once. The endpoint is https://api.blockchair.com/{:chain}/dashboards/addresses/{:addr1},{:addr2},... (supported for BTC, BCH, LTC, DASH, BSV, and DOGE). E.g., now, if you need to retrieve information about 3 different addresses, you wouldn't need to make 3 separate queries, you'd need to query just https://api.blockchair.com/bitcoin/dashboards/addresses/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa,12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX,1HLoD9E4SDFFPDiYfNYnkBLQ85Y51J3Zb1. The response contains information on the set of addresses (total balance, total transaction count, etc.), information about each address, and the list of the latest 100 transactions for this set (iterable with &offset=N). The maximum number of addresses in one query is 100 (higher limits are available for our premium users). Querying multiple addresses at once works much faster (e.g. it's almost 95 times faster to query 100 addresses via the new endpoint compared to making separate requests).
v.2.0.20 - Apr 19th, 2019
- Now it's possible to query state changes caused by a block for all chains we support except for ETH. The endpoint is https://api.blockchair.com/{:chain}/state/changes/block/{:block_id}. The response contains an array where the keys are addresses which were affected by the block, and the values are balance changes. Example: https://api.blockchair.com/bitcoin/state/changes/block/1 returns 12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX => 5000000000 which means that the only state change caused by this block was rewarding the miner with 50 bitcoins. This is useful if you need to track balance changes for a lot of addresses - you can now simply track state changes and find the needed addresses there instead of constantly retrieving information about the balances.
v.2.0.19 - Apr 17th, 2019
- Added alpha support for Ripple (see Ripple support in the docs)
- Introducing Graph API for Ethereum (a possibility to find connections between two Ethereum addresses), see Ethereum graph in the docs) - it's in private alpha test mode
- If you're constantly hitting Error 402 (i.e. by making too many requests per minute to our free API), you'll now receive Error 429 which means that your IP is banned for an hour. Not honoring our limits may result in a permanent ban
- Fixed a couple of minor bugs in our Ethereum engine. We'll be rolling out an updated engine the next week, there shouldn't be any compatibility breaking changes
v.2.0.18 - Apr 2nd, 2019
- Added biggest transactions over the last 24h to https://api.blockchair.com/{chain}/stats calls (largest_transaction_24h key);
- Updated xpub support to v.b3 (see xpub support in the docs, there are some breaking changes);
- Updated aggregation support to v.b4 (see Data aggregation support in the docs)
- We're DEPRECATING usage of unsupported parameters in GET and POST requests to our API endpoints (e.g. https://api.blockchair.com/stats?myarbitrarykey=1234 might result in a 400 Bad Request error);
- Previously DEPRECATED API v.1 has been shut down
- Previously DEPRECATED undocumented ?export= functionality now requires an API key (apply at <info@blockchair.com>) for everything except:
  - Aggregated results
  - blocks tables across all blockchains we support
v.2.0.17 - Mar 14th, 2019
- Added support for Bitcoin SV nodes, they are now separate from Bitcoin Cash nodes. Endpoint: https://api.blockchair.com/bitcoin-sv/nodes.
v.2.0.16 - Mar 13th, 2019
- Added support for ypub and zpub for Bitcoin and Litecoin in test mode. See xpub support in the docs.
v.2.0.15 - Mar 12th, 2019
- Added Dash support in test mode. We're supporting all the features for DASH as we support for other Satoshi-like coins. Additional columns: blocks.cbtx, transactions.type (possible types: simple, proregtx, proupservtx, proupregtx, prouprevtx, cbtx, qctx, subtxregister, subtxtopup, subtxresetkey, subtxcloseaccount), transactions.is_instant_lock, transactions.is_special (true for all transaction types except simple), transactions.special_json (contains special transaction data encoded in json). E.g.: https://api.blockchair.com/dash/blocks
v.2.0.14 - Mar 6th, 2019
- Added xpub support in test mode. There's now support for retrieving info about multiple addresses using xpub keys. Use https://api.blockchair.com/{chain}/dashboards/xpub/{xpub}. See xpub support in the docs.
- Extended data aggregation abilities (still in test mode), see Data aggregation support in the docs. Now it's possbile to find correlations with price, and use special functions (e.g. to calculate SegWit adoption).
- We're DEPRECATING API v.1 and will be shutting it down on April 1st, 2019.
- We're DEPRECATING undocumented ?export= functionality when exporting large datasets without an API key. This feature will be documented in one of the next updates.
- Full support for CREATE2 in Ethereum (see https://blockchair.com/ethereum/calls?q=type(create2)#)
- When using CSV/TSV API (undocumented ?export= functionality) amounts in USD are now shown as in the JSON API version (previously you had to divide them by 10000). bitcoin.outputs.type, ethereum.transaction.type, and ethereum.calls.type now yield strings (e.g. pubkeyhash instead of 2).
v.2.0.13 - Feb 13th, 2019
- Added support for Cyrillic characters in fulltext search, e.g. https://api.blockchair.com/bitcoin/outputs?q=script_bin(~привет)
v.2.0.12 - Feb 12th, 2019
- Fixed a bug in Ethereum where some contract creations were erroneously shown as failed (thanks Daniel Luca for noticing)
v.2.0.11 - Feb 5th, 2019
- We're changing behavior of our mempool tables (for all supported coins except for Ethereum): now they don't contain the contents of the latest block (it was quite a clumsy thing to have both mempool transactions and transactions from the latest block in this table, but we've rebuilt our engine, so now mempool tables contain mempool content only, and it finally makes sense!). That means:
  - {chain}/mempool/blocks is deprecated. Hint: if you used mempool/blocks to get info about the latest block you can simply switch to using blocks?limit=1, e.g. https://api.blockchair.com/bitcoin/blocks?limit=1
  - {chain}/mempool/transactions and {chain}/mempool/outputs now don't contain info from the latest block, while {chain}/transactions and {chain}/outputs do
  - Before this update when using (undocumented) export functionality there was no information about the latest block at all, now there is
  - The same change to Ethereum will come in one of the next updates
- Dogecoin is out of beta.
- Bitcoin SV is out of beta. Please note there's still a possibility that we won't be able to offer some functionality in the long term if blocks suddenly become larger than 1 exabyte, we're still waiting for a more clear development roadmap.
v.2.0.10 - Jan 29th, 2019
- Added Dogecoin support in test mode (see Dogecoin support in the docs)
v.2.0.9 - Dec 13th, 2018
- Added Bitcoin SV support in test mode (see Bitcoin SV support in the docs); updated aggregation abilities (see Data aggregation support in the docs)
v.2.0.8 - Nov 26th, 2018
- Added the ability to retrieve raw transaction data in hex, see Retrieving raw transactions in the docs
v.2.0.7 - Nov 22th, 2018
- Now it's possible to broadcast transactions using our API, see Broadcasting transactions in the docs
v.2.0.6 - Oct 8th, 2018
- Added data aggregation of blockchain data in beta mode, see Data aggregation support in the docs
v.2.0.5 - Oct 8th, 2018
- Fixed bug where balance and received for bitcoin[-cash]|litecoin addresses in the {chain}/dashboards/address/{address} call were calculated wrong if there were specific unconfirmed transactions
v.2.0.4 - Oct 3rd, 2018
- Added some new useful fields to {chain}/stats calls
v.2.0.3 - Sep 18th, 2018
- Added context.api.tested_features with the list of features our API supports, but with no guarantee for backward compatibility if updated. Added Omni Layer and Wormhole support in testing mode (see "Tested features changelog")
v.2.0.2 - Sep 9th, 2018
- Added address.contract_created to the ethereum/dashboards/address/{A} call
v.2.0.1 - Sep 1st, 2018
- Added Litecoin support
v.2.0.0
- Migrating from API v.1 to API v.2 (see the docs)

Support

E-mail: info@blockchair.com

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

API.md

API.md

Blockchair.com API

API v.2 documentation

Please apply for an API key first

Changelog

Support

Files

API.md

Latest commit

History

API.md

File metadata and controls

Blockchair.com API

API v.2 documentation

Please apply for an API key first

Changelog

Support