diff --git a/core/chains/evm/config/v2/defaults/Base_Goerli.toml b/core/chains/evm/config/v2/defaults/Base_Goerli.toml
new file mode 100644
index 00000000000..5ecfd036f46
--- /dev/null
+++ b/core/chains/evm/config/v2/defaults/Base_Goerli.toml
@@ -0,0 +1,29 @@
+ChainID = '84531'
+ChainType = 'optimismBedrock'
+FinalityDepth = 200
+LogPollInterval = '2s'
+NoNewHeadsThreshold = '40s'
+MinIncomingConfirmations = 1
+
+[GasEstimator]
+EIP1559DynamicFees = true
+PriceMin = '1 wei'
+BumpMin = '100 wei'
+
+[GasEstimator.BlockHistory]
+BlockHistorySize = 60
+
+[Transactions]
+ResendAfterThreshold = '30s'
+
+[HeadTracker]
+HistoryDepth = 300
+
+[NodePool]
+SyncThreshold = 10
+
+[OCR]
+ContractConfirmations = 1
+
+[OCR2.Automation]
+GasLimit = 6500000
diff --git a/core/chains/evm/config/v2/defaults/Base_Mainnet.toml b/core/chains/evm/config/v2/defaults/Base_Mainnet.toml
new file mode 100644
index 00000000000..314c12f8c54
--- /dev/null
+++ b/core/chains/evm/config/v2/defaults/Base_Mainnet.toml
@@ -0,0 +1,29 @@
+ChainID = '8453'
+ChainType = 'optimismBedrock'
+FinalityDepth = 200
+LogPollInterval = '2s'
+NoNewHeadsThreshold = '40s'
+MinIncomingConfirmations = 1
+
+[GasEstimator]
+EIP1559DynamicFees = true
+PriceMin = '1 wei'
+BumpMin = '100 wei'
+
+[GasEstimator.BlockHistory]
+BlockHistorySize = 24
+
+[Transactions]
+ResendAfterThreshold = '30s'
+
+[HeadTracker]
+HistoryDepth = 300
+
+[NodePool]
+SyncThreshold = 10
+
+[OCR]
+ContractConfirmations = 1
+
+[OCR2.Automation]
+GasLimit = 6500000