402oracle

Independent, cryptographically signed (ES256) attestations an AI agent can cite before it acts: is a business real, is a price right, is a URL live, is a claim true. Pay per call in USDC over x402 — no accounts, no API keys. Free unsigned MCP tier to evaluate.

Skills

• verify business
  Verify a business or domain is real and established before your agent pays an invoice, onboards a vendor, or trusts it. A business-verification oracle for KYB, vendor screening, and fraud checks: RDAP registration age, DNS (A/MX/NS), email posture (SPF/DMARC), and HTTPS reachability. Returns a signed attestation with a 0-100 trust score and evidence URLs.
  verificationbusiness-verificationkybvendor-screeningdomain-reputationfraud-checkdue-diligenceattestationx402
• verify price
  Confirm a crypto asset's price before your agent trades, quotes, or settles on it. A signed price oracle: cross-checks Coinbase, Kraken, and OKX for a median and flags divergence when sources disagree. Returns a signed attestation your agent can cite.
  verificationprice-confirmationcrypto-priceprice-oraclemarket-dataattestationx402
• verify freshness
  Check that a URL is live and its data is fresh before your agent acts on its contents. A freshness oracle: returns HTTP status, Last-Modified/ETag, a content SHA-256, and whether the content changed versus a prior hash. Returns a signed attestation.
  verificationurl-freshnessliveness-checkchange-detectioncontent-hashattestationx402
• verify claim
  Fact-check a single factual claim against web evidence before your agent relies on it. A fact-checking oracle and hallucination guard: returns a verdict (supported / contradicted / insufficient), a confidence score, and citations, as a signed attestation.
  verificationfact-checkclaim-adjudicationhallucination-guardcitationsattestationx402
• verify business batch
  Verify up to 5 business domains in one signed attestation — vendor lists, invoice batches, marketplace supplier screening. Same checks as /verify/business per domain (RDAP registration age, DNS, SPF/DMARC, HTTPS) with a 0-100 trust score each, returned as one ES256-signed attestation. Flat $0.15 per batch: 40% below the per-domain price of single calls at a full batch.
  verificationbatch-verificationkybvendor-screeningsupplier-onboardingbulk-due-diligenceattestationx402

How to call

https://402oracle.com

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