{ "x402Version": 2, "x402VersionsSupported": [ 1, 2 ], "service": "402oracle", "version": "1.6.0", "description": "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 via x402 (v2 with v1 back-compat) — no accounts, no API keys. Free unsigned MCP tier to evaluate.", "network": "base", "networkCaip2": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "acceptedNetworks": [ { "network": "base", "networkCaip2": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "assetName": "USD Coin" }, { "network": "polygon", "networkCaip2": "eip155:137", "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359", "assetName": "USD Coin" }, { "network": "arbitrum", "networkCaip2": "eip155:42161", "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831", "assetName": "USD Coin" } ], "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a", "endpoints": [ { "method": "POST", "path": "/verify/business", "resource": "https://402oracle.com/verify/business", "price_atomic_usdc": "50000", "price_usd": "0.05", "description": "Is this company or domain legit? Business and domain verification (KYB) for vendor screening, supplier checks and scam or fraud review: domain age and registrar from RDAP, DNS (A/MX/NS), email security (SPF/DMARC) and HTTPS. Returns a verdict and a 0-100 trust score with evidence URLs, and flags newly registered or thin-infrastructure domains, a common scam signal. Use it before your agent pays an invoice, onboards a vendor or trusts a site. Signed attestation. Bulk: /verify/business/batch.", "input_schema": { "type": "object", "properties": { "domain": { "type": "string", "description": "Domain to verify, e.g. example.com" } }, "required": [ "domain" ] } }, { "method": "POST", "path": "/verify/price", "resource": "https://402oracle.com/verify/price", "price_atomic_usdc": "20000", "price_usd": "0.02", "description": "Crypto price check: the current spot price of Bitcoin (BTC), Ethereum (ETH), Solana (SOL) or any token ticker in USD, cross-checked across five exchanges (Coinbase, Kraken, OKX, Binance, CoinGecko). Returns the median price, the spread between venues and a divergence flag, as a signed price oracle attestation your agent can cite. Use it before your agent trades, quotes, values a portfolio or settles on a token price. Needs at least two live quotes; a ticker no venue lists is not charged.", "input_schema": { "type": "object", "properties": { "symbol": { "type": "string", "description": "Ticker symbol, e.g. BTC, ETH, SOL" } }, "required": [ "symbol" ] } }, { "method": "POST", "path": "/verify/freshness", "resource": "https://402oracle.com/verify/freshness", "price_atomic_usdc": "20000", "price_usd": "0.02", "description": "Website uptime and change check: is this URL up right now, and has the page changed? Fetches the URL and returns the HTTP status, Last-Modified and ETag headers, a SHA-256 fingerprint of the content, and whether it changed versus a hash you pass in. Use it to check a site is live, detect stale data, monitor a page for changes, or decide whether to invalidate a cache before your agent acts on what it says. Returns a signed attestation.", "input_schema": { "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" ] } }, { "method": "POST", "path": "/verify/claim", "resource": "https://402oracle.com/verify/claim", "price_atomic_usdc": "250000", "price_usd": "0.25", "description": "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.", "input_schema": { "type": "object", "properties": { "claim": { "type": "string", "description": "A single factual claim, 8-600 characters" } }, "required": [ "claim" ] } }, { "method": "POST", "path": "/verify/business/batch", "resource": "https://402oracle.com/verify/business/batch", "price_atomic_usdc": "150000", "price_usd": "0.15", "description": "Bulk domain and company check: domain age, registrar and legitimacy for up to 5 business domains in one call. Screen a prospect or lead list, qualify companies before outreach, check vendor and supplier lists, or clear invoice batches. Same checks as /verify/business per domain (RDAP domain age, DNS, SPF/DMARC, HTTPS) with a verdict and 0-100 trust score each, as one ES256-signed attestation. Flat $0.15 per batch: 40% below the per-domain price of single calls at a full batch.", "input_schema": { "type": "object", "properties": { "domains": { "type": "array", "items": { "type": "string", "description": "Domain, e.g. example.com" }, "minItems": 2, "maxItems": 5, "description": "2-5 domains to verify in one call. Duplicates are de-duplicated." } }, "required": [ "domains" ] }, "paid_only": true, "note": "Flat rate per call, not per item. No free MCP tier for this endpoint." } ], "free_tier": { "protocol": "mcp", "endpoint": "https://402oracle.com/mcp", "note": "Rate-limited, unsigned results.", "daily_limit": 25, "resets_at": "2026-10-07T00:00:00.000Z", "paid_upgrade": { "note": "The same MCP endpoint accepts x402 payment. Add PAYMENT-SIGNATURE (x402 v2) or X-PAYMENT (v1) to any tools/call for a signed attestation at the prices above. Paid calls are not rate-limited and do not consume free quota.", "transports": [ "mcp", "http" ] } }, "openapi": "https://402oracle.com/openapi.json", "agent_card": "https://402oracle.com/.well-known/agent-card", "llms_txt": "https://402oracle.com/llms.txt", "stats": "https://402oracle.com/stats", "attestation_verification": { "jwks": "https://402oracle.com/.well-known/jwks.json", "alg": "ES256", "canonicalization": "sorted-keys-json" } }