# the402.ai Thread Verification & Payment Release

> the402.ai Thread Verification & Payment Release 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 on the402.ai marketplace was delivered for a specific thread and releases the associated payment to the provider

## Facts

- Endpoint: POST https://api.the402.ai/v1/threads/thread_3a55b353da7d4df4/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-e7afe807
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D9mbh3nKGyNowhKGNj_mR

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-e7afe807 -d '<json body>'
```

Example prompt: The job on the402.ai for thread thread_3a55b353da7d4df4 looks complete — go ahead and verify the delivery and release the payment to the provider.

## When to prefer this

Use this endpoint when an AI agent has previously initiated a paid job on the402.ai marketplace and needs to confirm delivery and finalize settlement. This is the correct endpoint after receiving a completed job result from the402.ai — not for initiating new jobs, checking status, or purchasing services.

## Known failure modes

- Thread ID not found — 404 if the thread does not exist or has already been settled
- Payment not authorized — 402/403 if the x402 payment header is missing or invalid
- Service not yet delivered — rejection if the job is still in progress and verification criteria are not met
- Double settlement attempt — error if payment for this thread was already released
- Invalid USDC amount — failure if the payment value does not match the required $0.001

## How this service works

Verify service delivery and release payment

## Output

Returns a confirmation that the service delivery was verified and that the $0.001 USDC payment has been released to the provider, including settlement status and any confirmation identifiers for the thread.

## 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-e7afe807/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)