{"uid":"cap_r0dMHXj95wmrrNsXJIgSk","slug":"phantom-api-arbitrum-rpc-endpoint-0206fb83","name":"Phantom API — Arbitrum RPC Endpoint","description":"Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.","url":"https://phantom-api-omega.vercel.app/api/arbitrum/rpc","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"method":{"type":"string"},"params":{"type":"array","items":{}}}},"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_NqBlWuO3GNYU9FAkn_mtO","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 pay-per-call JSON-RPC access to the Arbitrum network, enabling blockchain data queries and smart contract interactions on Arbitrum via the standard Ethereum RPC interface.","exampleAgentPrompt":"What is the current ETH balance of wallet address 0xABC...123 on Arbitrum? Use eth_getBalance with the latest block tag.","exampleUseCases":[{"title":"DeFi portfolio balance checker","prompt":"Check the ETH balance on Arbitrum for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — use the latest block."},{"title":"Smart contract state read","prompt":"Call the balanceOf function on the Arbitrum USDC contract at 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045."},{"title":"Transaction confirmation check","prompt":"Look up the receipt for Arbitrum transaction 0x4f1e2b9a3c8d7e6f5a4b3c2d1e0f9a8b7c6d5e4f3a2b1c0d9e8f7a6b5c4d3e2f1 and tell me if it succeeded."}],"resultDescription":"Returns standard Ethereum JSON-RPC response objects containing requested blockchain data such as balances (in wei), block objects, transaction receipts, smart contract return values, gas estimates, or event logs, depending on the method called.","failureModes":["Invalid JSON-RPC method name returns an error object with code -32601","Malformed params array causes -32602 invalid params error","Payment failure (insufficient x402 balance) blocks the request before it reaches the RPC node","Network congestion or node unavailability may cause timeouts","Calls to non-existent contracts return 0x or empty data without explicit error"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call, no-subscription Arbitrum RPC access billed in USDC via x402 micro-payments — ideal for agents that make sporadic or low-volume on-chain queries without committing to a monthly RPC plan. Prefer over free public endpoints when reliability and response speed matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:06:05.554Z","isFirstParty":false}