{"uid":"cap_E1EcCGNIuC-olPfeHfNft","slug":"x402-multi-chain-evm-json-rpc-proxy-aa01af29","name":"x402 Multi-Chain EVM JSON-RPC Proxy","description":"Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, polygon, arbitrum, optimism) — eth_call, eth_getBalance, eth_getTransactionReceipt, eth_getBlockByNumber, and more","url":"https://agentx402pay.com/api/rpc?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["method"],"properties":{"chain":{"type":"string","description":"Chain to query: base, ethereum, polygon, arbitrum, optimism (default base)"},"method":{"type":"string","description":"Read-only JSON-RPC method name, e.g. eth_getBalance, eth_call, eth_blockNumber"},"params":{"type":"string","description":"JSON-encoded array of RPC params, e.g. [\"0xabc...\",\"latest\"] (default [])"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FSj1YuREWMUNpQfm3ap3E","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Provides safelisted read-only JSON-RPC access to major EVM blockchains (Base, Ethereum, Polygon, Arbitrum, Optimism) via standard methods like eth_call, eth_getBalance, and eth_getBlockByNumber","exampleAgentPrompt":"What's the current ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet?","exampleUseCases":[{"title":"Check wallet balance on Base","prompt":"Look up the ETH balance of 0xAbCd1234...5678 on Base — what do they have in their wallet right now?"},{"title":"Fetch transaction receipt on Polygon","prompt":"Can you pull the transaction receipt for hash 0xabc123...def456 on Polygon and tell me if it succeeded?"},{"title":"Read smart contract value on Arbitrum","prompt":"Call eth_call on the contract at 0xContractAddress on Arbitrum using params [\"0xContractAddress\", {\"data\": \"0x18160ddd\"}] and give me the result."}],"resultDescription":"Returns a standard JSON-RPC response object containing the result field with on-chain data such as a balance in hex wei, a transaction receipt object, block details, or a smart contract call return value. Errors are surfaced as JSON-RPC error objects with a code and message.","failureModes":["Unsupported or write RPC method requested — only safelisted read-only methods are allowed","Invalid or malformed params JSON array causing parse error","Unsupported chain name returns an error or defaults to Base","Network timeout or upstream RPC node unavailability","Payment not received or invalid x402 payment header causes 402 rejection"],"whenToPreferThis":"Choose this endpoint when you need lightweight, pay-per-call read-only EVM RPC access across multiple chains without managing your own node or API keys. Ideal for agents that need occasional on-chain lookups (balances, receipts, block data, contract reads) across Base, Ethereum, Polygon, Arbitrum, or Optimism without committing to a full RPC provider subscription. Prefer this over dedicated RPC providers when building agentic workflows that already use x402 micropayment infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:41:13.654Z","isFirstParty":false,"canonicalSlug":"x402-multi-chain-evm-json-rpc-proxy-aa01af29"}