# ResultRail by LarryBuildsAI > Pay-per-success public data result packs for AI agents. MCP endpoint: https://x402-resource-scanner.vercel.app/resultrail/mcp Category: Agent Data / Pay-Per-Success Results OpenAPI: https://x402-resource-scanner.vercel.app/resultrail/openapi.json x402 manifest: https://x402-resource-scanner.vercel.app/.well-known/resultrail-x402 MCP discovery: https://x402-resource-scanner.vercel.app/.well-known/resultrail-mcp.json Server card: https://x402-resource-scanner.vercel.app/.well-known/resultrail-server-card.json Marketplace root: https://x402-resource-scanner.vercel.app/resultrail/marketplaces Marketplace JSON: https://x402-resource-scanner.vercel.app/resultrail/marketplaces.json Marketplace packet: https://x402-resource-scanner.vercel.app/resultrail/marketplaces.md Tools: - quote_data_result: Free pre-payment quote for one ResultRail public-data result. Returns price, paid endpoint, success contract, and whether the buyer's max price covers the result. ($0.00) - enrich_domain_result: Fetch a public domain/homepage and return one source-attributed result pack: company/title/description, industry guess, technographic signals, useful paths, confidence, sources, and receipt hash. ($0.12) - extract_url_result: Fetch one public URL and return title, description, headings, text preview, links, confidence, source URL, and receipt hash. Designed for pay-per-success agent extraction. ($0.05) Product boundary: ResultRail is not Signal Desk, GateCheck, Boundary Guard x402, or x402 Resource Scanner. Claim boundary: ResultRail returns public-data result packs with source URLs, timestamps, confidence, and receipt hashes. It does not sell private contact databases, bypass access controls, provide legal/financial advice, send outreach, place bets, trade assets, or guarantee downstream revenue.