# 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 specific thread and releases the associated payment to the provider

## Facts

- Endpoint: POST https://api.the402.ai/v1/threads/thread_9b0adb82375a470b/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-eef2a972
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z80Oi4sPrsrkQBLISGjHT

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-eef2a972 -d '<json body>'
```

Example prompt: The job on thread thread_9b0adb82375a470b looks complete — go ahead and verify the delivery and release the payment to the provider.

## When to prefer this

Use this endpoint when you have completed receiving a service on the402.ai marketplace via a specific thread and are ready to confirm delivery and release the micropayment. This is the finalization step in the402 escrow flow — call it after confirming the deliverable meets expectations, not before.

## Known failure modes

- Thread ID not found — returns 404 if the thread does not exist
- Service not yet delivered — returns error if delivery conditions are not met
- Payment already released — idempotency failure if payment was previously settled
- Insufficient funds or payment authorization missing — returns 402 or authorization error
- Invalid thread state — thread may not be in a verifiable state

## How this service works

Verify service delivery and release payment

## Output

A confirmation that the service delivery has been verified and the USDC payment has been released from escrow to the service provider, including transaction status and any relevant settlement details.

## 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-eef2a972/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)