> ## Documentation Index
> Fetch the complete documentation index at: https://docs.graphadvocate.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Agent card

> A2A discovery metadata — machine-readable agent identity for other agents to call Graph Advocate.

## Well-known endpoint

```
GET /.well-known/agent-card.json
```

Returns the A2A protocol agent card: skills, endpoints, authentication, and capabilities — so other agents can discover and call Graph Advocate without a human in the loop.

```bash theme={null}
curl https://graphadvocate.com/.well-known/agent-card.json
```

## ERC-8004

Graph Advocate is registered on the ERC-8004 identity registry:

| Field           | Value                                                                                 |
| --------------- | ------------------------------------------------------------------------------------- |
| Agent ID        | `#734`                                                                                |
| Chain           | Arbitrum                                                                              |
| ENS             | `graphadvocate.eth`                                                                   |
| A2A endpoint    | `https://graphadvocate.com/`                                                          |
| MCP endpoint    | `https://graphadvocate.com/mcp`                                                       |
| x402 support    | Yes                                                                                   |
| Registry lookup | [a2aregistry.org/agent/afd9b3bb-413c-41cf-9874-6361ea309e32](https://a2aregistry.org) |

## Discoverable on

Graph Advocate is indexed across the agent-economy discovery layer:

| Registry                                     | Link                                                                                                                                              |
| -------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Agentic Market** (Coinbase's browsable UI) | [agentic.market/services/graphadvocate-com](https://agentic.market/services/graphadvocate-com)                                                    |
| **CDP x402 Bazaar** (merchant endpoint)      | [discovery/merchant?payTo=...](https://api.cdp.coinbase.com/platform/v2/x402/discovery/merchant?payTo=0x0FF5A6ecef783BBA35463ec2F8403B9B5e9e7C86) |
| **CDP x402 Bazaar** (semantic search)        | [discovery/search?query=graph+advocate](https://api.cdp.coinbase.com/platform/v2/x402/discovery/search?query=graph+advocate)                      |
| x402scan                                     | [www.x402scan.com](https://www.x402scan.com)                                                                                                      |
| 8004scan (Base)                              | [agents/base/41034](https://www.8004scan.io/agents/base/41034)                                                                                    |
| 8004scan (Arbitrum)                          | [agents/arbitrum/734](https://www.8004scan.io/agents/arbitrum/734)                                                                                |
| Ampersend                                    | [agent/8453:41034](https://app.ampersend.ai/discover/agent/8453:41034)                                                                            |
| Agentverse                                   | [agentverse.ai](https://agentverse.ai)                                                                                                            |
| ClawHub                                      | [paulieb14/graph-advocate](https://clawhub.ai/paulieb14/graph-advocate)                                                                           |

CDP Bazaar listing was triggered by the first successful settle through the CDP facilitator — there's no separate registration step. See the [x402 Bazaar docs](https://docs.cdp.coinbase.com/x402/bazaar) for how indexing works.