onyx_erc8004_lookup

Active

declared in 1.26.0

Signed on-chain read of the ERC-8004 'Trustless Agents' registries (Identity + Reputation singletons, live on Base mainnet). Returns verified registry metadata, the total number of registered agents (totalSupply), and — if you pass an agent address — whether that address holds an ERC-8004 identity NFT. Read-only eth_call, no funds; the whole reading is Ed25519-signed by 0n1x so an agent can prove the registry fact before trusting a counterparty. (price: $0.05 USDC, tier: metered)

Parameters schema

{
  "type": "object",
  "required": [],
  "properties": {
    "chain": {
      "enum": [
        "base"
      ],
      "type": "string",
      "description": "Chain to read (default 'base' = Base mainnet, eip155:8453)."
    },
    "address": {
      "type": "string",
      "description": "Optional agent EVM address (0x...) to check for an ERC-8004 identity (balanceOf > 0)."
    },
    "registry": {
      "enum": [
        "identity",
        "reputation"
      ],
      "type": "string",
      "description": "Which singleton to read (default 'identity')."
    }
  }
}

What this tool wraps· 1 endpoint

min confidence0.70 0.50

Packagepypi: x402
declared dependency0.85

Parent server

onyx-paid-mcp

https://github.com/dimitrilaouanis-tech/onyx-mcp

2/7 registries

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