Discover / api.fairseal.io

api.fairseal.io

□ No challenge detected

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). Include Idempotency-Key header to prevent double-charges on retry.

x402
Base
USDC

Listed price: $0.05
Challenge detected: 0 of the last 9 checks
Last checked: 17 Oct, 09:26 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://api.fairseal.io/v1/notarize
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

POSThttps://api.fairseal.io/v1/notarize$0.05Anchor 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). Include Idempotency-Key header to prevent double-charges on retry.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.fairseal.io

Recent checks

3 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
17 Oct, 09:26 UTC	No challenge detected	200	178ms
16 Oct, 08:13 UTC	No challenge detected	200	347ms
14 Oct, 19:26 UTC	No challenge detected	200	392ms
12 Oct, 22:31 UTC	No challenge detected	200	364ms
11 Oct, 00:15 UTC	No challenge detected	200	304ms
9 Oct, 15:32 UTC	No challenge detected	200	434ms
8 Oct, 09:33 UTC	No challenge detected	200	385ms
7 Oct, 03:32 UTC	No challenge detected	200	333ms
3 Oct, 17:05 UTC	No challenge detected	200	320ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 17 Oct, 09:26 UTC, we detected no payment challenge.

What price is recorded for api.fairseal.io?

Its listed price is $0.05.

What payment terms does api.fairseal.io advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is api.fairseal.io listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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