# Get Web3 chain data by chain ID

Retrieve comprehensive chain data including authentication JWT token valid for 30 days. Supports both mainnet and testnet chains.

Endpoint: GET /chains/{chainId}
Version: 2.0.53
Security: projectKey

## Path parameters:

  - `chainId` (string, required)

## Response 200 fields (application/json):

  - `name` (string, required)
    Name of the chain

  - `shortName` (string)
    Short name of the chain

  - `chain` (string)
    Chain name

  - `network` (string)
    Network name

  - `chainId` (number, required)
    Chain ID

  - `explorerUrl` (string)
    explorer URL

  - `networkId` (number)
    Network ID

  - `rpcUrl` (string, required)
    RPC URL

  - `wsUrl` (string)
    WebSocket URL

  - `authHeader` (string)
    Authorization header

  - `chainType` (string, required)
    Chain type