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x402 Market Echo (CDP Facilitator Mode)
x402
x402 Market Echo (CDP Facilitator Mode) is a paid API for AI agents from x402-market-api.lien-studio-akiyama.workers.dev, paid per call via x402, $0.010000/call, status unknown (last checked 2026-09-14).
Echoes back an HTTP request payload, with payment settlement routed through the Coinbase CDP Facilitator, for testing x402 payment protocol discoverability and integration.
Price / call$0.010000
Success—
StatusUnknown
How this service works
Same echo endpoint as test-echo-prod, but settlement is routed through the Coinbase Facilitator instead of self-verified on-chain. Used to validate Coinbase Bazaar discoverability for x402-market listings.
Output
Returns the echoed input body as received, confirming the x402 CDP-facilitated payment was processed and the endpoint is reachable and functioning correctly.
Example use cases
Example prompt
“Send a POST echo test through the x402 CDP facilitator endpoint — use a JSON body like {"hello": "world"} and confirm the payload comes back correctly.”
Technical details
Endpoint
POSThttps://x402-market-api.lien-studio-akiyama.workers.dev/api/seller-4068b8fc/test-echo-cdpWhen to prefer
Use this endpoint when you need to test or validate the x402 micropayment protocol with Coinbase CDP as the payment facilitator rather than self-verified on-chain settlement — particularly when testing Bazaar discoverability or confirming the corrected v2-spec PaymentPayload.extensions wire format works end-to-end.
Side effects
- Payment not included or malformed x402 header returns 402 Payment Required
- Invalid body type (not json/form-data/text) returns validation error
- Missing required 'input' object returns schema validation error
- CDP facilitator unavailable causes payment settlement failure
- Non-POST/PUT/PATCH method returns method not allowed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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