{"uid":"cap_YbAYGDnyCMsTtHoSIO7mx","slug":"pennyrail-chain-id-lookup-cd00a186","name":"PennyRail Chain ID Lookup","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/chain.info--chain-id-lookup?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"string"}}},"responseSchema":{"type":"object","additionalProperties":true},"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":"unknown","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_80qapSzIO5hJIW0pESmfk","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":"Looks up blockchain chain information by chain ID or identifier string via a machine-readable settlement endpoint","exampleAgentPrompt":"Can you look up the chain info for Ethereum mainnet using chain ID 1 on PennyRail?","exampleUseCases":[{"title":"Identify unknown blockchain network","prompt":"I have a transaction with chain ID 137 — can you look up what blockchain network that corresponds to and give me its details?"},{"title":"Validate chain ID before bridging","prompt":"Before I bridge tokens, can you confirm the chain info for chain ID 42161 so I know I'm targeting the right network?"},{"title":"Resolve chain name for wallet config","prompt":"I need to configure a wallet and I only have the chain ID 56 — can you look up the full chain info so I can set it up correctly?"}],"resultDescription":"Returns a JSON object containing chain metadata for the queried chain identifier, such as chain name, network type, chain ID number, and other relevant network parameters. The response schema is open-ended and may include additional fields depending on the chain.","failureModes":["Unknown or unsupported chain ID returns an error or empty result","Malformed input string causes a validation failure","Service unavailability on the Vercel deployment returns a 5xx error","Payment failure via x402 protocol results in a 402 response and no data returned","Chain ID exists but metadata is incomplete or not indexed"],"whenToPreferThis":"Use this endpoint when you need a quick, machine-readable lookup of blockchain chain metadata by chain ID and are operating in an x402 micropayment-enabled agent environment. It is appropriate when you need to resolve a numeric or string chain identifier to human-readable network details programmatically at low cost ($0.001 USDC per call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T07:05:33.369Z","isFirstParty":false,"canonicalSlug":"pennyrail-chain-id-lookup-cd00a186"}