Chain ID Registry Lookup Tool

WHAT IT DOES

The Chain ID Registry Lookup Tool is a developer tool that provides quick access to EVM chain information. It queries a local registry database of over 25 EVM-compatible networks, returning details such as chain name, native currency, block explorer URL, and RPC endpoints. This helps developers quickly find the correct chain ID for configuration, verify network details, and access RPC endpoints without searching through documentation.

HOW TO USE

Enter a chain ID (e.g., "1", "137", "42161") or a network name (e.g., "Ethereum", "Polygon", "Arbitrum") into the search field. Click "look up" or press Enter to query the registry. The tool displays matching chain information including the chain name, chain ID, native currency symbol, block explorer URL, and available RPC endpoints. Results are shown in a clean card layout with all relevant details for each matching chain.

TECHNICAL MECHANISM

The tool uses a built-in registry database of EVM chain information compiled from Chainlist and other public sources. Each entry contains the chain ID, name, native currency symbol, block explorer URL, and an array of RPC endpoints. The lookup algorithm first attempts an exact numeric match on chain ID, then falls back to case-insensitive substring matching on chain names and native currency symbols. The tool returns all matching results, which is particularly useful for partial name searches that may match multiple networks (e.g., "Goerli" matches Goerli and Optimism Goerli). Results are displayed in a structured format with clickable explorer links and copyable RPC endpoints. The registry is stored locally in the tool and can be updated through future releases of the tool.

WHAT IT CANNOT SEE

The tool cannot verify if the chain is currently active or operational. It cannot determine if the RPC endpoints are working without attempting a connection. The tool cannot detect chain-specific issues like forks or network congestion. It cannot provide gas price estimates or current network status. The tool cannot update the registry without new releases. It cannot include chains not listed in the registry database. The tool cannot validate chain ID uniqueness across the registry. It cannot determine if a chain ID is deprecated or replaced.

PLEASE NOTE

This tool is designed for Ethereum Virtual Machine (EVM) compatible chains only. The registry includes the most common EVM networks but may not include all existing chains. RPC endpoints are provided for reference and may not be operational—always verify endpoints before use. The tool provides information only and does not connect to or validate the chains. For the most up-to-date chain information, refer to Chainlist or the respective chain's official documentation. The tool is intended to accelerate development and configuration tasks.