# x402 Agent Suite Attestation Registry Lookup

> x402 Agent Suite Attestation Registry Lookup is a paid API for AI agents from x402-agent-suite-production.up.railway.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Looks up attestation records from the registry, filterable by agent ID and minimum security grade, after micropayment on Base or Solana.

## Facts

- Endpoint: GET https://x402-agent-suite-production.up.railway.app/api/attestation/registry?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-agent-suite-attestation-registry-lookup-40a89819
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FpatAYFwfoJuncPe9tpAf

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-agent-suite-attestation-registry-lookup-40a89819
```

Example prompt: Can you look up the attestation registry for agent ID 'agent-abc123', returning up to 50 records and only those with a minimum security grade of B?

## When to prefer this

Use this endpoint when you need to bulk-query or search the attestation registry with filters (by agent ID and/or minimum security grade), as opposed to verifying a single specific attestation. Prefer this over the sibling verification endpoint when you want a list of registry entries rather than a binary pass/fail check on one attestation.

## Known failure modes

- Payment not received or invalid — returns 402 Payment Required
- Invalid minGrade value outside A–F range — returns 400 Bad Request
- No records found for specified agentId — returns empty records array with count 0
- Network unavailable (Base/Solana) — returns 503 Service Unavailable
- Invalid limit parameter (non-integer) — returns 400 Bad Request

## How this service works

24 paid x402 infrastructure APIs for AI agent fleets: buy advisor, audition coach, guard, proxy, MPP, attestations, and pipeline orchestration.

## Output

Returns a JSON object containing a count of matching attestation records, the policy description, and an array of registry entry records filtered by the specified agentId and minGrade parameters.

## Example request

```json
{
 "input": {
  "queryParams": {
   "limit": 50,
   "agentId": "agent-abc123",
   "minGrade": "B"
  }
 },
 "output": {
  "example": {
   "count": 0,
   "policy": "Attestation registry entries",
   "records": []
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "count",
      "records",
      "policy"
     ],
     "properties": {
      "count": {
       "type": "number"
      },
      "policy": {
       "type": "string"
      },
      "records": {
       "type": "array",
       "items": {
        "type": "object"
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 0,
  "policy": "Attestation registry entries",
  "records": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-agent-suite-attestation-registry-lookup-40a89819/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent-suite-production.up.railway.app](https://www.zero.xyz/host/x402-agent-suite-production.up.railway.app/llms.txt)