{"schema":"https://webmcp.dev/schema/manifest.json","schemaVersion":"1.0","name":"Coin Railz x402 Payment Infrastructure","description":"Production-grade multi-chain payment infrastructure for AI agents and MCP servers. 80 services across 9 blockchains. Pay-per-call via USDC/x402 or prepaid API-key credits. Includes USDC Yield Vault (ERC-4626 on Base, auto-routing across Aave v3/Compound v3/Morpho Blue), NASA Earthdata Intelligence, AI Inference, IoT/DePIN, Prediction Markets, and more. No account required for trial.","version":"1.0.0","provider":{"name":"Coin Railz","url":"https://coinrailz.com","contact":"support@coinrailz.com"},"mcpServers":{"coinrailz":{"type":"http","url":"https://coinrailz.com/mcp","description":"MCP JSON-RPC 2.0 transport. Handles initialize, tools/list, tools/call for 80 paid services. Pay-per-call via USDC/x402 or prepaid API-key credits.","authentication":{"modes":["x-api-key","x402"],"trialKey":{"description":"Free $5 trial API key — instant, no crypto, no account","endpoint":"https://coinrailz.com/api/m2m/credits/trial","method":"GET","header":"X-API-KEY: cr_live_..."},"x402":{"description":"On-chain USDC payment via x402 protocol (EIP-7615). Supported chains: Base, Ethereum, Polygon, Arbitrum, Solana.","challengeHeader":"WWW-Authenticate","paymentHeader":"X-Payment","facilitators":["cdp.coinbase.com","dexter.cash"]}},"capabilities":{"toolDiscovery":true,"paidToolExecution":true,"freeTrialAvailable":true,"streamingSupported":false},"endpoints":{"serviceList":"https://coinrailz.com/mcp/services","checkout":"https://coinrailz.com/api/mcp/payments/checkout","services":"https://coinrailz.com/api/mcp/payments/services","health":"https://coinrailz.com/api/mcp/payments/health","trial":"https://coinrailz.com/api/m2m/credits/trial","purchase":"https://coinrailz.com/api/m2m/credits/checkout/session"}}},"protocols":["x402","MCP","WebMCP","A2A","MPP"],"openapi":"https://coinrailz.com/openapi.json","agentCard":"https://coinrailz.com/.well-known/agent-card.json","integrationGuide":"https://coinrailz.com/mcp-integration-guide","updatedAt":"2026-08-12T06:41:50.216Z"}