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mart402.com v1 verify
https://mart402.com/v1/verify
answers 402
Invoice field verification for AI agents: arithmetic consistency of invoice fields, line-item totals, and accounting JSON. 0.001/call.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 141 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-15T14:38:19.914Z (2d ago)
- Category
- ai-inference
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fmart402.com%2Fv1%2Fverify"