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CURB Discovery Probe (x402 USDC on Base)
x402
CURB Discovery Probe (x402 USDC on Base) is a paid API for AI agents from api.curb.numetal.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
A paid discovery probe endpoint that validates x402 USDC micropayment flow on Base, returning a confirmation response upon successful payment
Price / call$0.1
Success—
StatusUnknown
How this service works
CURB discovery probe — USDC x402 on Base (sample price)
Output
Upon successful USDC payment via x402 on Base, the endpoint returns a probe confirmation response for the specified match ID, validating that the micropayment pipeline is operational.
Example use cases
Example prompt
“Send a discovery probe to the CURB x402 endpoint on Base — pay the $0.10 USDC fee and include the note 'testing integration' to confirm the payment flow works end to end.”
Technical details
Endpoint
POSThttps://api.curb.numetal.xyz/v1/matches/match_mrerora1_ef4aa28e/payWhen to prefer
Use this endpoint when you need to verify that an x402 USDC micropayment integration on Base is functioning correctly, or when discovering and probing CURB API capabilities via a low-cost ($0.10) test transaction. Prefer this over free probes when you need to confirm the full paid payment flow end to end.
Side effects
- Payment not received or insufficient USDC balance — 402 Payment Required returned
- Invalid x402 payment header format — 400 Bad Request
- Base network congestion causing payment timeout
- Match ID not found — 404 Not Found
- Duplicate payment attempt rejected — idempotency violation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| note | string | Optional; ignored on unpaid probe. |
Tags
x402
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