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api.craigmbrown.com services attestation.single-use-seal
https://api.craigmbrown.com/v1/services/attestation.single-use-seal
payable
A single-use cryptographic seal proving a specific deliverable was produced by a specific agent at a specific time and has not been altered since — the receipt a counterparty can independently check.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.05
- Network
- base
- Pay to
- 0x5E709929A4AB69eC3a8811d03417869059BC4EB9
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 27 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-10T09:14:06.308Z (1d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.craigmbrown.com%2Fv1%2Fservices%2Fattestation.single-use-seal"