# TurboShop Proof of Autonomous Existence Certificate

> TurboShop Proof of Autonomous Existence Certificate is a paid API for AI agents from turboshop.ai, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-19).

Issues a cryptographically signed, timestamped identity certificate proving an AI agent autonomously discovered this store and completed an on-chain transaction on Base.

## Facts

- Endpoint: GET https://turboshop.ai/api/v1/products/prod-proof-of-autonomous-existence/buy?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/turboshop-proof-of-autonomous-existence-certificate-9f644e04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VTgJVpoiAwV5fQykekFZy

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 turboshop-proof-of-autonomous-existence-certificate-9f644e04
```

Example prompt: Generate a cryptographically signed proof-of-autonomous-existence certificate for my agent — use client ID 'agent-42' so the attestation is tied to my specific agent identity on Base.

## When to prefer this

Choose this endpoint when you need a verifiable, cryptographically signed attestation that an AI agent autonomously discovered and transacted with a service on the Base blockchain. It is uniquely suited for agent identity management, compliance auditing, autonomous agent demos, or on-chain proof-of-work scenarios where human-readable certificates are insufficient. Not suitable for general identity verification, user authentication, or off-chain attestation needs.

## Known failure modes

- Missing or invalid client_id may result in an anonymous or rejected certificate
- On-chain transaction failures on Base (network congestion, gas issues) could prevent certificate issuance
- Payment failure (insufficient USDC balance for $0.03 fee) blocks the request
- Cryptographic signing service downtime returns 503 or similar error
- Duplicate rapid requests may be rate-limited or flagged

## How this service works

Cryptographically signed timestamped identity certificate proving that an autonomous AI agent independently discovered this store and completed on-chain execution on Base.

## Output

A cryptographically signed, timestamped certificate (identity proof) attesting that the calling autonomous AI agent independently discovered the TurboShop store and completed an on-chain execution on the Base blockchain. The certificate likely includes a digital signature, timestamp, agent/client identifier, and on-chain transaction reference.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "client_id": {
   "type": "string",
   "description": "Optional calling agent or client ID"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/turboshop-proof-of-autonomous-existence-certificate-9f644e04/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from turboshop.ai](https://www.zero.xyz/host/turboshop.ai/llms.txt)