# x402-experiments Attestation Log (lab.paidapis.net)

> x402-experiments Attestation Log (lab.paidapis.net) is a paid API for AI agents from lab.paidapis.net, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns a paginated, cryptographically signed log of on-chain payment attestations recorded by the x402 experiment suite on Base mainnet.

## Facts

- Endpoint: GET https://lab.paidapis.net/api/attestation-log
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-experiments-attestation-log-lab-paidapis-net-fc75a96c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MiRVpNWYRbcxF6N7GzCer

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-experiments-attestation-log-lab-paidapis-net-fc75a96c
```

Example prompt: Pull me the last 50 attestation records from the x402 experiment log and include the page signature so I can verify they haven't been tampered with.

## When to prefer this

Choose this endpoint when you need a cryptographically signed, paginated snapshot of x402 payment attestation records from the Base mainnet experiment suite — especially when tamper-evidence via pageSignature and signerAddress is required. Prefer alternatives if you need real-time streaming, full historical export beyond 100 records per call, or attestations from a different chain or protocol.

## Known failure modes

- limit out of range (must be 1-100) returns validation error
- payment not included or invalid x402 header returns HTTP 402
- signer key unavailable causes missing or empty pageSignature
- empty attestation log returns count 0 and empty array
- network or Base RPC failure may cause 500 error

## How this service works

Audit trail: a verifiable, timestamped log of past oracle attestations (?limit=, default 20). Each entry carries its own signature from the verify-tx endpoint; the returned page is also freshly signed as a whole.

## Output

A JSON object containing a count of returned entries, a generatedAt ISO timestamp, an array of attestation objects (each describing an on-chain payment event), a pageSignature (cryptographic signature over the page), and a signerAddress identifying the signing key — enabling tamper-evident verification of the log.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "description": "Max entries to return, 1-100 (default 20)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "count": {
   "type": "integer"
  },
  "generatedAt": {
   "type": "string"
  },
  "attestations": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "pageSignature": {
   "type": "string"
  },
  "signerAddress": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-experiments-attestation-log-lab-paidapis-net-fc75a96c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lab.paidapis.net](https://www.zero.xyz/host/lab.paidapis.net/llms.txt)