Supported Networks＃

This page provides a quick reference for chains supported by Isthmus Queries, including each chain's Isthmus chain ID and the level of support for key methods: eth_call, eth_call_by_timestamp, and eth_call_with_finality.

The Expected History column shows how much recent state data is typically available for querying, though this can vary depending on the chain and the configuration of each Guardian node.

The support shown in the table reflects what has been confirmed through testing. However, query success ultimately depends on whether the underlying call can be executed on each Guardian’s RPC node.

For example, many chains use a fork of Geth, which by default retains 128 blocks of state in memory (unless archive mode is enabled). On Ethereum mainnet, this covers around 25 minutes of history—but on faster chains like Ethereum, it may span only about three minutes. While Guardian nodes are expected to have access to recent state, there are currently no guarantees on how far back historical data is available.

Mainnet＃

Testnet＃

ℹ️EthCallByTimestamp arguments for targetBlock and followingBlock are currently required for requests to be successful on these chains.