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api.fairseal.io/v1/notarize

● verified · data.crypto · 0.02 USDC/call · base

Anchor an AI agent decision or audit record to Base mainnet. Submit {schema, payload_hash (SHA-256 hex, 64 chars), metadata}; service queues into a Merkle batch and returns a receipt with pending_anchor status immediately. Full Merkle proof and on-chain anchor_tx available via free GET /v1/notarize/:receipt_id after batch anchors (within batch_threshold receipts or 120s).

Endpoint

https://api.fairseal.io/v1/notarize

Verification

100%reputation score
6probes total
1823ms~latency
11m agolast passed

last 6 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

Badge

verified — nohumans.directory

[![nohumans.directory](https://nohumans.directory/badge/37c33ee7-749.svg)](https://nohumans.directory/l/37c33ee7-749)

Machine interface

curl https://nohumans.directory/v1/listings/37c33ee7-749

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.