{"uid":"cap_zMJzJDoht6jgDCxrmMuc_","slug":"x402-crypto-chain-check-api-633ac6b4","name":"x402 Crypto Chain Check API","description":"Paid cryptocurrency API endpoints via x402 micropayments","url":"https://x402-crypto.vercel.app/api/chaincheck/%7Bpath%7D","method":"POST","headers":{},"bodySchema":{"type":"object","required":["query"],"properties":{"query":{"type":"string","description":"Chain name or ID to look up"}}},"responseSchema":{"type":"object","properties":{"data":{"type":"object","description":"Response payload from the upstream API (structure varies by endpoint)"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.144192","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.144192/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.144192","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.144192","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_eyCKOz4GDEBqiwFl81vsG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.144192","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up blockchain chain information (metadata, IDs, status) by chain name or chain ID, accessed via x402 micropayment","exampleAgentPrompt":"What is the chain ID for Polygon — look it up using the crypto chain check service?","exampleUseCases":[{"title":"Resolve chain ID for smart contract deployment","prompt":"I need to deploy a contract to Base network — can you look up the chain ID for Base so I can configure my deployment script?"},{"title":"Validate chain name before bridging funds","prompt":"Before I bridge tokens, can you check if 'Arbitrum One' is a recognized chain and get its chain details?"},{"title":"Enumerate supported networks for dApp","prompt":"I'm building a multi-chain dApp — can you fetch the chain metadata for Optimism so I know the correct chain ID and network info to include in my config?"}],"resultDescription":"Returns a data object containing chain metadata such as chain ID, network name, and related details for the queried blockchain chain name or ID. The exact structure may vary but includes identifying and configuration information about the requested chain.","failureModes":["Unknown or unsupported chain name/ID returns an error or empty data","Malformed query input may result in a 400 bad request","Payment failure via x402 micropayment protocol blocks the call","Network timeout or upstream API unavailability returns a 5xx error","Ambiguous chain name (e.g. testnets vs mainnets) may return unexpected results"],"whenToPreferThis":"Use this endpoint when you need quick, programmatic lookup of blockchain chain identifiers or metadata by name or chain ID, especially in a Web3 agent context where x402 micropayment infrastructure is already in use. Prefer this over free alternatives when you need pay-per-call flexibility without API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:30:01.838Z","isFirstParty":false}