{"uid":"cap_ItcPXX723cPlfwhuvzPpJ","slug":"x402-toolbox-chain-id-lookup-0f414b9c","name":"x402-toolbox Chain ID Lookup","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/chain/chain-id?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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_lVDahrW4fceQQnaZivAAT","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":"Returns chain metadata for a given blockchain network ID via a pay-per-call x402 micro-payment endpoint","exampleAgentPrompt":"Look up the chain metadata for chain ID 8453 — I just need to confirm what network that corresponds to and any relevant details about it.","exampleUseCases":[{"title":"Confirm Base network chain ID","prompt":"Can you look up chain ID 8453 and confirm it's the Base network? I want to verify before I configure my smart contract deployment."},{"title":"Resolve unknown EVM chain","prompt":"I have a transaction signed for chain ID 42161 — can you fetch the chain details so I know which network that is?"},{"title":"Validate chain before bridging funds","prompt":"Before I bridge some USDC, can you pull up the chain metadata for chain ID 10 so I can confirm it's Optimism and everything looks right?"}],"resultDescription":"A JSON object with an 'ok' boolean indicating success and a 'paid' boolean confirming the x402 micro-payment was accepted, along with chain metadata for the requested chain ID.","failureModes":["Invalid or unknown chain ID returns an error or empty result","Payment not included or rejected by x402 protocol returns 402 Payment Required","Malformed schema parameter causes bad request","Cloudflare Worker timeout or cold-start latency on rare occasions"],"whenToPreferThis":"Use this endpoint when you need quick, no-signup blockchain chain metadata lookups and are operating in an x402-enabled payment environment with USDC on Base. It is ideal for AI agents that need to resolve chain IDs programmatically without API key management — the micro-payment serves as identity. Prefer this over free alternatives when you need guaranteed availability without rate-limit concerns tied to accounts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T00:45:52.633Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-chain-id-lookup-0f414b9c"}