{"uid":"cap_DT0z6dibOMoL0DeAqyB6t","slug":"evm-chain-lookup-0f9a3bc6","name":"EVM Chain Lookup","description":"Look up any EVM chain by chain ID or name (8453, base, arbitrum): chain ID in decimal and hex, native currency, public RPC URLs, block explorers and testnet flag. Use to configure wallets, RPCs or cross-chain apps.","url":"https://bess-x402.onrender.com/v1/crypto/chain?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["q"],"properties":{"q":{"type":"string","description":"Chain ID or name"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jHlXv7Z7-GcX93Bk4Scwi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Look up metadata for any EVM-compatible blockchain by chain ID or name, returning chain ID (decimal and hex), native currency, public RPC URLs, block explorers, and testnet flag.","exampleAgentPrompt":"What are the public RPC URLs, block explorer, and hex chain ID for Base mainnet (chain ID 8453)?","exampleUseCases":[{"title":"Wallet configuration for new chain","prompt":"I'm adding Arbitrum to MetaMask — can you look up its chain ID, native currency, and a public RPC URL so I can fill in the network settings?"},{"title":"Testnet detection before deployment","prompt":"Before I deploy this contract, can you check if chain 80001 is a testnet or mainnet and give me its block explorer URL?"},{"title":"Cross-chain app RPC setup","prompt":"I'm building a multi-chain app and need the RPC endpoints and chain IDs for Optimism, Polygon, and Base — can you look those up one by one?"}],"resultDescription":"Returns the chain's decimal and hex chain ID, native currency symbol and name, list of public RPC URLs, block explorer URLs, and a boolean testnet flag — everything needed to configure a wallet, RPC connection, or cross-chain application.","failureModes":["Unknown chain ID or name returns an error or empty result","Misspelled chain name may not resolve correctly","RPC URLs returned may be public community endpoints with rate limits or downtime","No results for very new or obscure EVM-compatible chains not yet indexed"],"whenToPreferThis":"Use this endpoint when you need authoritative EVM chain metadata (RPC URLs, chain IDs, explorers, currency) by querying a chain ID number or well-known chain name like 'base' or 'arbitrum'. Prefer this over hardcoding chain data or scraping chainlist.org, especially in agent workflows that need to configure wallets or validate network settings dynamically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T18:25:10.996Z","isFirstParty":false,"canonicalSlug":"evm-chain-lookup-0f9a3bc6"}