Read Agent Data on Solana | Metaplex Agent Registry

Read and verify agent identity data on-chain after registration.

Check Registration

The safe fetch method returns null instead of throwing if the identity doesn't exist, which is useful for checking whether an asset has been registered:

import { safeFetchAgentIdentityV1, findAgentIdentityV1Pda } from '@metaplex-foundation/mpl-agent-registry';

const pda = findAgentIdentityV1Pda(umi, { asset: assetPublicKey });
const identity = await safeFetchAgentIdentityV1(umi, pda);

console.log('Registered:', identity !== null);

Fetch from Seeds

You can also fetch the identity directly from the asset's public key without manually deriving the PDA:

import { fetchAgentIdentityV1FromSeeds } from '@metaplex-foundation/mpl-agent-registry';

const identity = await fetchAgentIdentityV1FromSeeds(umi, {
  asset: assetPublicKey,
});

Verify the AgentIdentity Plugin

Registration attaches an AgentIdentity plugin to the Core asset. You can read it directly off the fetched asset to inspect the registration URI and lifecycle hooks:

import { fetchAsset } from '@metaplex-foundation/mpl-core';

const assetData = await fetchAsset(umi, assetPublicKey);

const agentIdentity = assetData.agentIdentities?.[0];
console.log(agentIdentity?.uri);               // registration URI
console.log(agentIdentity?.lifecycleChecks?.transfer);  // truthy
console.log(agentIdentity?.lifecycleChecks?.update);    // truthy
console.log(agentIdentity?.lifecycleChecks?.execute);   // truthy

Read the Registration Document

The uri on the AgentIdentity plugin points to an off-chain JSON document with the agent's full profile — name, description, service endpoints, and more. Fetch it like any other URI:

import { fetchAsset } from '@metaplex-foundation/mpl-core';

const assetData = await fetchAsset(umi, assetPublicKey);
const agentIdentity = assetData.agentIdentities?.[0];

if (agentIdentity?.uri) {
  const response = await fetch(agentIdentity.uri);
  const registration = await response.json();

  console.log(registration.name);          // "Plexpert"
  console.log(registration.description);   // "An informational agent..."
  console.log(registration.active);        // true

  for (const service of registration.services) {
    console.log(service.name);             // "web", "A2A", "MCP", etc.
    console.log(service.endpoint);         // service URL
    console.log(service.version);          // protocol version (if set)
  }
}

The document follows the ERC-8004 agent registration standard. A typical one looks like this:

{
  "type": "agent-registration-v1",
  "name": "An informational agent providing help related to Metaplex protocols and tools.",
  "description": "An autonomous agent that executes DeFi strategies on Solana.",
  "image": "https://arweave.net/agent-avatar-tx-hash",
  "services": [
    {
      "name": "web",
      "endpoint": "https://metaplex.com/agent/<ASSET_PUBKEY>"
    },
    {
      "name": "A2A",
      "endpoint": "https://metaplex.com/agent/<ASSET_PUBKEY>/agent-card.json",
      "version": "0.3.0"
    }
  ],
  "active": true,
  "registrations": [
    {
      "agentId": "AgentAssetPublicKey111111111111111111111111111",
      "agentRegistry": "solana:mainnet:1DREGFgysWYxLnRnKQnwrxnJQeSMk2HmGaC6whw2B2p"
    }
  ],
  "supportedTrust": ["reputation", "crypto-economic"]
}

See Register an Agent for the full field reference.

Fetch the Agent's Wallet

Every Core asset has a built-in wallet called the Asset Signer — a PDA derived from the asset's public key. No private key exists, so it can't be stolen. The wallet can hold SOL, tokens, or any other asset. Derive the address with findAssetSignerPda:

import { findAssetSignerPda } from '@metaplex-foundation/mpl-core';

const assetSignerPda = findAssetSignerPda(umi, { asset: assetPublicKey });

const balance = await umi.rpc.getBalance(assetSignerPda);
console.log('Agent wallet:', assetSignerPda);
console.log('Balance:', balance.basisPoints.toString(), 'lamports');

The address is deterministic, so anyone can derive it from the asset's public key to send funds or check balances. Only the asset itself can sign for this wallet, through Core's Execute instruction via a delegated executive.

See the MPL Agent Registry smart contract docs for account layouts, PDA derivation details, and error codes.

Notes

The Asset Signer is a PDA — no private key exists for it. It can receive funds from any source, but only the asset itself can sign outgoing transactions through Core's Execute instruction.
safeFetchAgentIdentityV1 returns null for unregistered assets rather than throwing, making it safe for existence checks without try/catch.
findAssetSignerPda derives the wallet address deterministically. The same address is returned regardless of network, so you can use it on devnet and mainnet with the same asset key.