402oracle

Is this company real? Verify a company or domain is legitimate and established before your agent pays an invoice, onboards a vendor, or trusts it. A KYB (know your business) and due-diligence oracle for vendor screening, supplier checks and fraud review: RDAP domain registration age, DNS (A/MX/NS), email posture (SPF/DMARC), HTTPS reachability. Flags newly registered or thin-infrastructure domains. Returns a signed attestation, 0-100 trust score, evidence URLs. Bulk: /verify/business/batch. Free tier is unsigned and rate-limited. For a cryptographically signed attestation with no daily limit ($0.05 USDC), add an x402 payment header to THIS SAME tool call (PAYMENT-SIGNATURE for v2, X-PAYMENT for v1) or POST /verify/business over HTTP. Same price on either transport.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain to verify, e.g. example.com"
    }
  },
  "required": [
    "domain"
  ]
}

Is this price correct? Confirm a crypto asset's spot price before your agent trades, quotes, or settles on it. A signed price oracle and price feed for any ticker: Bitcoin (BTC), Ethereum (ETH), Solana (SOL) or any USD/USDT-quoted symbol. Cross-checks up to five venues (Coinbase, Kraken, OKX, Binance, CoinGecko) for a median exchange rate, requires at least two live sources, and flags divergence when they disagree. Returns a signed attestation your agent can cite. Free tier is unsigned and rate-limited. For a cryptographically signed attestation with no daily limit ($0.02 USDC), add an x402 payment header to THIS SAME tool call (PAYMENT-SIGNATURE for v2, X-PAYMENT for v1) or POST /verify/price over HTTP. Same price on either transport.

{
  "type": "object",
  "properties": {
    "symbol": {
      "type": "string",
      "description": "Ticker symbol, e.g. BTC, ETH, SOL"
    }
  },
  "required": [
    "symbol"
  ]
}

Is this URL live, and has this page changed? Check a URL is up and its data is fresh before your agent acts on its contents, to detect stale data, or to decide whether to invalidate a cache. A freshness oracle and point-in-time uptime and change-detection check: returns HTTP status, Last-Modified/ETag, a content SHA-256 fingerprint, and whether the content changed versus a prior hash. Returns a signed attestation. Free tier is unsigned and rate-limited. For a cryptographically signed attestation with no daily limit ($0.02 USDC), add an x402 payment header to THIS SAME tool call (PAYMENT-SIGNATURE for v2, X-PAYMENT for v1) or POST /verify/freshness over HTTP. Same price on either transport.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Full URL including https://"
    },
    "prior_hash": {
      "type": "string",
      "description": "Optional prior SHA-256 hex to compare against"
    }
  },
  "required": [
    "url"
  ]
}

Is this claim true? Fact-check a single factual claim or statement against live web evidence before your agent relies on it. A fact-checking oracle, hallucination guard, and grounding and citation check for misinformation review: returns a verdict (supported / contradicted / insufficient), a confidence score, and source citations, as a signed attestation your agent can cite. Free tier is unsigned and rate-limited. For a cryptographically signed attestation with no daily limit ($0.25 USDC), add an x402 payment header to THIS SAME tool call (PAYMENT-SIGNATURE for v2, X-PAYMENT for v1) or POST /verify/claim over HTTP. Same price on either transport.

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string",
      "description": "A single factual claim, 8-600 characters"
    }
  },
  "required": [
    "claim"
  ]
}