quartermaster.surewhynot.app
Pre-flight an x402 payment: decode the endpoint's challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with a payer address — verify the wallet can afford the call on Base.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 519 ms
- Price
- $0.003 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Travel: flights
- Address
- https://quartermaster.surewhynot.app/v1/x402/simulate
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/1afdf8cfe8b7.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).