{"uid":"cap_-Xz6ImKH-u2WH1TKDSRTP","slug":"blockchain-chain-facts-lookup-e359b1f4","name":"Blockchain Chain Facts Lookup","description":"What are the basic facts of this chain (CAIP-2 id, gas token, explorer, x402/MPP settlement, stablecoins)? Cited chain facts from a prepared dataset: CAIP-2 chain id, gas token, finality class, block explorer, whether x402 and MPP settle there, and stablecoins. Fields not established from a source are the string \"unknown\". Unknown chains and malformed input return 404/400 and are never charged.","url":"https://payments-intel-production.up.railway.app/v1/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"],"type":"string"},"queryParams":{"type":"object","required":["chain"],"properties":{"chain":{"type":"string","description":"Chain slug, name or CAIP-2 id, e.g. base, solana, eip155:8453"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_lNxw40pouxNqydQzG94l1","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":"Returns canonical chain metadata (CAIP-2 ID, gas token, finality class, block explorer, x402/MPP settlement support, and stablecoins) for a named or identified blockchain","exampleAgentPrompt":"What are the chain facts for Base — its CAIP-2 ID, gas token, block explorer, whether it supports x402 and MPP settlement, and which stablecoins are available on it?","exampleUseCases":[{"title":"Verify x402 payment route for chain","prompt":"Before I send an x402 payment, can you check whether Optimism actually supports x402 settlement and what stablecoins I can use there?"},{"title":"Resolve CAIP-2 ID for integration","prompt":"I need the official CAIP-2 chain ID for Base so I can configure my wallet integration — can you look that up?"},{"title":"Compare gas tokens across chains","prompt":"What's the native gas token on Polygon, and does it have a block explorer I can link users to?"}],"resultDescription":"A structured record containing: the canonical CAIP-2 chain ID, the native gas token symbol, the finality class (e.g. fast/probabilistic), the block explorer URL, boolean flags for x402 and MPP settlement support, and a list of supported stablecoins. Fields not sourced from a verified dataset return the string 'unknown'. Unknown or malformed chain identifiers return 404 or 400 respectively with no charge.","failureModes":["Unknown chain slug or name returns 404 with no charge","Malformed input (e.g. invalid CAIP-2 format) returns 400 with no charge","Fields without verified data return the string 'unknown' rather than an error","Chain not yet indexed in dataset returns 404"],"whenToPreferThis":"Use this endpoint when an agent needs to resolve authoritative chain metadata — especially CAIP-2 IDs, x402/MPP settlement eligibility, or stablecoin availability — from a single curated lookup rather than scraping documentation or relying on stale hardcoded values. Particularly valuable in payment routing flows where knowing whether a chain supports x402 or MPP before initiating a transaction avoids failed payment attempts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T00:30:56.991Z","isFirstParty":false,"canonicalSlug":"blockchain-chain-facts-lookup-e359b1f4"}