# the402.ai Thread Payment Verification

> the402.ai Thread Payment Verification is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Verifies that a service has been delivered on a thread and releases the associated payment to the provider

## Facts

- Endpoint: POST https://api.the402.ai/v1/threads/thread_b4bd1ded4d674d36/verify
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-the402-ai-7e54d97f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V5Blq6pUSaBbu7fG-Cv7k

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 api-the402-ai-7e54d97f -d '<json body>'
```

Example prompt: The task on thread thread_b4bd1ded4d674d36 looks complete — go ahead and verify the service was delivered and release the payment to the provider.

## When to prefer this

Use this endpoint when an AI agent or user has received a service on the402.ai marketplace and needs to confirm delivery and release the escrowed payment. This is the final settlement step in the402.ai's buy-now-pay-on-delivery workflow, distinct from simply checking job status or sending a message on a thread.

## Known failure modes

- Service not yet delivered — verification fails and payment is not released
- Invalid or expired thread ID returns a 404 or error
- Payment already released — idempotency violation returns an error
- Insufficient payment authorization or USDC balance
- Thread in wrong state for verification (e.g. already cancelled or disputed)

## How this service works

Verify service delivery and release payment

## Output

A confirmation that delivery has been verified and payment has been released, including transaction details and updated thread status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "id"
 ],
 "properties": {
  "id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-the402-ai-7e54d97f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)