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quartermaster.surewhynot.app v1 payment-proof
https://quartermaster.surewhynot.app/v1/payment-proof
payable
Verify an x402 settlement on Base OR Solana: pass a 0x transaction hash or a base58 signature, confirm it succeeded, decode its USDC transfers (event logs on Base, net token-balance deltas on Solana), and optionally assert the receiving wallet and amount.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.003
- Network
- base
- Pay to
- 0x5253666c40432f009ebd99908b9cd2a7fd1019cb
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 17 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-10T09:08:55.634Z (3d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fquartermaster.surewhynot.app%2Fv1%2Fpayment-proof"