{"uid":"cap_1O-oXFGr6uLyidiNUBR5N","slug":"fold-x402-onchain-json-rpc-gateway-8fb5009b","name":"fold · x402 — Onchain JSON-RPC Gateway","description":"Machine-readable market intelligence for onchain agents, served over x402.","url":"https://x402.fold.computer/rpc","method":"POST","headers":{},"bodySchema":{"type":"object","required":["chain","method"],"properties":{"chain":{"type":"string","description":"base, ethereum, arbitrum, optimism, polygon"},"method":{"type":"string","description":"read-only JSON-RPC method, e.g. eth_getBalance"},"params":{"type":"array","description":"JSON-RPC params"}}},"responseSchema":{"type":"object","required":["status","data"],"properties":{"data":{"type":"object","description":"results: title, url, publishedDate, highlights"},"status":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lMkrB9vlH-PCR22I2mvvH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Executes read-only JSON-RPC calls (e.g. eth_getBalance) against EVM-compatible chains, returning machine-readable onchain data for agents, priced per call via x402.","exampleAgentPrompt":"Check the ETH balance of address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base using eth_getBalance — I need the current onchain balance right now.","exampleUseCases":null,"resultDescription":"A JSON object with a 'status' field and a 'data' object containing the result of the JSON-RPC call, which may include fields like title, url, publishedDate, and highlights depending on the method called.","failureModes":["Unsupported chain name → likely 400 or error status","Invalid or non-read-only JSON-RPC method → error or rejected request","Malformed params array → RPC execution error","Payment failure (x402) → 402 response, call not executed","Node unavailable for chain → upstream RPC timeout or error"],"whenToPreferThis":"Use this endpoint when an AI agent needs to make read-only JSON-RPC calls against major EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon) and wants to pay per call via the x402 micropayment protocol. Prefer this over self-hosted RPC nodes when you want zero infrastructure setup and onchain micropayment billing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T15:25:27.095Z","isFirstParty":false}