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api.sandbox.brickken.com feedback respond
https://api.sandbox.brickken.com/x402/agent/feedback/respond
answers 402
Prepare ERC-8004 feedback response. Prepare an unsigned transaction that appends a response to an ERC-8004 feedback thread.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.005
- Network
- base-sepolia
- Pay to
- 0x6b0173489007dE9E2e619eccd98E8fa9c610849a
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 1387 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:19:04.193Z (2h ago)
- Category
- data
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.sandbox.brickken.com%2Fx402%2Fagent%2Ffeedback%2Frespond"