| Domain | Protocols | Serves | Description |
|---|---|---|---|
a.4cdn.org |
https, http |
4chan.org, 4channel.org |
This domain serves all 4chan API endpoints in the form of static json files. |
i.4cdn.org |
https, http |
4chan.org, 4channel.org |
This is the primary content domain used for serving user submitted media attached to posts. |
s.4cdn.org |
https, http |
4chan.org, 4channel.org |
Serves all static site content including icons, banners, CSS and JavaScript files. |
All the endpoints that make up the 4chan API. No additional GET parameters are accepted with any of these routes.
| File name | Description | Documentation page | URL example |
|---|---|---|---|
boards.json |
A list of all boards and their attributes. | Boards | https://a.4cdn.org/boards.json |
threads.json |
A summarized list of all threads on a board including thread numbers, their modification time and reply count. | Thread list | https://a.4cdn.org/po/threads.json |
catalog.json |
A JSON representation of a board catalog. Includes all OPs and their preview replies. | Catalog | https://a.4cdn.org/po/catalog.json |
archive.json |
A list of all closed threads in a board archive. Archived threads no longer receive posts. | Archive | https://a.4cdn.org/po/archive.json |
/<board>/<page#>.json |
A list of threads and their preview replies from a specified index page. Index pages start at 1. The maximum number of pages (can be found in boards.json) may vary depending on the board. |
Indexes | https://a.4cdn.org/po/3.json |
/<board>/thread/<OP #>.json |
A full list of posts in a single thread. | Threads | https://a.4cdn.org/po/thread/570368.json |