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x402.fairseal.io

Verifiable random numbers with cryptographic epoch references. Wesolowski 2048-bit VDF epoch chain with on-chain MerkleAnchor reference. For unbiased randomness: POST /v1/rng/commit (free), then GET the reveal_url returned in the response. Do not construct reveal paths yourself.

Visit x402.fairseal.io

Hostx402.fairseal.io
Price$0.001–$0.05 per call
NetworkBase
Paid endpoints listed5
Calls, last 30 days*43
Most unique payers on one endpoint (30 days)*4
Last paid call*2026-10-17

* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.

Endpoints

URLMethodPrice
https://x402.fairseal.io/v1/rng/latest
Verifiable random numbers with cryptographic epoch references. Wesolowski 2048-bit VDF epoch chain with on-chain…		GET$0.01
https://x402.fairseal.io/v1/pii/detect
Regex PII scan: emails, US/CA (NANP) phones, dash-formatted national IDs (partial; Taiwan-format alphanumeric IDs not…		POST$0.001
https://x402.fairseal.io/v1/notarize
Anchor an AI agent decision or audit record to Base mainnet. Submit {schema, payload_hash (SHA-256 hex, 64 chars),…		POST$0.05
https://x402.fairseal.io/v2/anchor
Anchor a SHA-256 payload hash (64 lowercase hex chars) into a Merkle batch on Base mainnet. Payment: $0.001 USDC per…		POST$0.02
https://x402.fairseal.io/v1/veo/verify
Verify AI agent outputs against a VEO-2 schema. Checks structural validity, SHA-256 hash integrity (if content hash is…		POST$0.002

Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.

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