← All endpoints
app.heinrichstech.com cdp echo
https://app.heinrichstech.com/v1/cdp/echo
payable, partial
BitBooth echo endpoint — pays a tiny USDC fee, returns a JSON echo. Reference implementation of the x402 + CDP Facilitator + Bazaar discovery loop.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
It advertises 8 ways to pay and only 6 of them are usable.- Price
- $0.001
- Network
- base
- Pay to
- 0xDa2F35d283c42dd60B965322394bc658a5c1769F
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 235 ms
- Payment options
- 6 usable of 8
- Last checked
- 2026-08-10T09:08:55.986Z (1d ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapp.heinrichstech.com%2Fv1%2Fcdp%2Fecho"