Docs · error · HTTP 404

-32600 Unknown chain or malformed request

The chain slug is not served, or the JSON-RPC envelope is not valid 2.0.

What to do

1. Use a served slug: eth_mainnet, base_mainnet, arbitrum_one, optimism_mainnet, polygon_pos, solana_mainnet
2. Send `jsonrpc`, `method`, `id` and an array `params`

Where it lives: /chains.

The exact answer

HTTP 404
{
  "error": {
    "code": -32600,
    "message": "Unknown chain: eth",
    "data": {
      "request_id": "<uuid>",
      "support": "/support/new?request_id=<uuid>"
    }
  }
}

All codes: error decoder · methods and limits · file it: /support/new?request_id=….