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Old Colony Web x402 Self-Test Payment
x402
Old Colony Web x402 Self-Test Payment is a paid API for AI agents from api.oldcolonyweb.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Executes a real $0.002 USDC x402 v2 payment on Base as a self-test, returning a simple JSON response as proof of successful payment settlement.
Price / call$0.002
Success—
StatusUnknown
How this service works
For $0.002, test a real x402 v2 exact USDC payment on Base and receive an intentionally simple JSON handler result. The successful final HTTP response and PAYMENT-RESPONSE header (not the body alone) are evidence of the x402 settlement flow. No refund, wallet-balance check, blockchain-finality guarantee, variable tip, data lookup or downstream action. Do not retry an ambiguous charge blindly.
Output
A simple JSON object confirming the handler executed, plus a PAYMENT-RESPONSE HTTP header that together serve as evidence of a completed x402 v2 USDC payment settlement on Base. No data lookup, refund, or downstream action is triggered.
Example use cases
Verify x402 agent payment pipeline
“Run an x402 v2 self-test to confirm my agent's wallet can actually settle a real $0.002 USDC micropayment on Base — I need proof the payment flow works before I wire up production endpoints.”
Debug x402 settlement integration
“My x402 integration might be broken — can you fire a real $0.002 USDC self-test on Base and show me the PAYMENT-RESPONSE header so I can see whether settlement is completing correctly?”
Onboard new agent to x402 payments
“I'm setting up a new AI agent and want to validate it can handle x402 payments — please trigger the $0.002 USDC self-test on Base so I can confirm the full payment handshake goes through.”
Technical details
Endpoint
POSThttps://api.oldcolonyweb.com/v1/payment/self-test?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify that an x402 v2 payment flow is working end-to-end with a real USDC transaction on Base, especially during agent integration setup or debugging. It is the lowest-cost way to confirm x402 settlement without performing any real data operation. Do not use it for actual data retrieval, email validation, DNS lookup, or any other functional task.
Side effects
- Insufficient USDC balance — payment rejected before handler is reached
- Ambiguous charge (e.g. network timeout mid-flight) — do not retry blindly as funds may have already settled
- Invalid x402 payment header format — 402 Payment Required response returned
- Base network congestion causing delayed or failed on-chain settlement
- Malformed request body — 400 Bad Request if required fields are missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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