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x402-market-api CDP-Mode Echo (Fresh/v2-spec)
x402
x402-market-api CDP-Mode Echo (Fresh/v2-spec) 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 POST request body through a CDP-mode x402 payment-gated endpoint, used to validate the corrected v2-spec PaymentPayload.extensions wire format in Bazaar discovery.
Price / call$0.010000
Success—
StatusUnknown
How this service works
Third cdp-mode echo listing, created after the v2-spec PaymentPayload.extensions fix. Used to test whether a brand-new resource indexed only with the corrected wire format gets picked up by Bazaar discovery.
Output
The endpoint echoes back the submitted HTTP request body along with an output type descriptor. The response confirms whether the x402 v2-spec PaymentPayload.extensions wire format was accepted and processed correctly through the CDP facilitator.
Example use cases
Example prompt
“Send a test POST with a JSON body like {"hello": "world"} to the fresh CDP-mode echo endpoint and show me what gets echoed back — I want to confirm the x402 v2-spec payment flow and Bazaar indexer pickup are working correctly.”
Technical details
Endpoint
POSThttps://x402-market-api.lien-studio-akiyama.workers.dev/api/seller-4068b8fc/test-echo-cdp-freshWhen to prefer
Use this endpoint when you need to test the x402 v2-spec PaymentPayload.extensions wire format specifically with a freshly indexed Bazaar resource in CDP mode. Prefer this over the other CDP echo siblings (test-echo-cdp, test-echo-cdp-2) when you want to verify that brand-new resources indexed only with the corrected wire format are picked up by Bazaar discovery. At $0.01 USDC it is the cheapest CDP-mode echo option available on this host.
Side effects
- Payment not provided or invalid x402 PaymentPayload — returns 402 Payment Required
- Malformed input: missing required fields (type, method, bodyType, body) — returns 400 Bad Request
- Unsupported HTTP method (must be POST/PUT/PATCH) — returns 422 Unprocessable Entity
- CDP facilitator settlement failure — payment rejected, no echo returned
- Incorrect wire format for PaymentPayload.extensions — payment rejected pre-v2-spec fix
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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