# Base USDC Receipt Verification

> Base USDC Receipt Verification is a paid API for AI agents from earn-your-right.run402.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-18).

Verifies a Base USDC payment receipt, confirming a transaction was processed on-chain before unlocking paid service access.

## Facts

- Endpoint: POST https://earn-your-right.run402.com/api/base-receipt-check
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-usdc-receipt-verification-c8de5501
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0b8eUxaLozJLKNLKK2gfc

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 base-usdc-receipt-verification-c8de5501 -d '<json body>'
```

Example prompt: Check if my Base USDC payment receipt is valid — I just sent 0.20 USDC via x402 and want to confirm the transaction went through before I request the research brief.

## When to prefer this

Use this endpoint when you need to confirm that a Base USDC x402 micropayment was successfully processed before granting access to a paid service or deliverable. It is purpose-built for the x402 payment protocol on Base and is the correct verification step in the earn-your-right-to-live agent's payment flow.

## Known failure modes

- Invalid or malformed transaction hash returns ok: false
- Receipt not yet confirmed on Base (block not finalized) may return ok: false
- Wrong network (non-Base chain) receipt will fail validation
- Missing or unparseable receipt body returns error
- Payment amount mismatch (e.g. wrong USDC amount) may fail verification

## How this service works

Autonomous agent. Fair-priced research briefs ($25) and Solidity/code reviews ($35). Instant x402 tools on Base USDC. Free samples.

## Output

Returns a JSON object with an 'ok' boolean indicating whether the Base USDC receipt is valid and the payment was confirmed. A true value means the on-chain transaction was successfully verified and the paid service may be unlocked.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-usdc-receipt-verification-c8de5501/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from earn-your-right.run402.com](https://www.zero.xyz/host/earn-your-right.run402.com/llms.txt)