{"uid":"cap_QJT2-hZxSJ05WJLQFuTYE","slug":"taifoon-on-chain-data-query-base-c0dfe3ee","name":"Taifoon On-Chain Data Query (Base)","description":"On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and grades the answer before you are charged. A failed answer is not charged. Answer + graded receipt. 0.03 USDC a call.","url":"https://coord.taifoon.dev/v1/x402/class/data.onchain_query?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"object","required":["question","chainId"],"properties":{"pool":{"type":"string","description":"pool_tokens: a Uniswap V3 pool address"},"block":{"type":"integer","description":"block_hash: a block number"},"chainId":{"enum":[8453],"type":"integer"},"question":{"enum":["pool_tokens","block_hash"],"type":"string"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Kqv8_Lxy__4L3x5TG1JGq","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Queries on-chain data on the Base network (chain ID 8453) — either the tokens and fee tier of a Uniswap V3 pool, or the hash of a specific block — with an adversarial grading step that validates the answer before charging.","exampleAgentPrompt":"What are the two tokens and fee tier in Uniswap V3 pool 0x4C36388bE6F416A29C8d8Eee81C771cE6bE14B18 on Base — can you do a pool_tokens query and give me a verified answer?","exampleUseCases":[{"title":"Identify tokens in a Uniswap pool","prompt":"I found a pool address on Base — 0x6c2a1fC0E5F14Fe2DBd5DfD5bB7d9d70Af1cf15 — can you tell me which two tokens it holds and what the fee tier is? Use a pool_tokens query."},{"title":"Retrieve a block hash on Base","prompt":"What is the block hash for block number 18500000 on the Base network? Do a block_hash lookup and give me the verified result."},{"title":"Verify DeFi pool composition","prompt":"I'm building a trading bot and need to confirm what tokens are in a specific Uniswap V3 pool on Base at address 0xd0b53D9277642d899DF5C87A3966A349A798F224 — can you query pool_tokens and return the graded answer?"}],"resultDescription":"Returns the answer provided by a data seller (e.g. pool token addresses and fee tier, or block hash), along with a graded receipt confirming Taifoon independently verified the answer against on-chain state. Failed or incorrect answers are not charged. Successful calls cost 0.03 USDC.","failureModes":["Data seller provides incorrect answer — query is graded as failed, not charged","Invalid pool address or non-existent block number causes lookup failure","Unsupported chain ID (only Base / 8453 is supported)","Missing required fields (question or chainId) returns validation error","Network or on-chain RPC issues may cause temporary unavailability"],"whenToPreferThis":"Choose this endpoint when you need verified, graded on-chain facts about Base network state — specifically Uniswap V3 pool composition (tokens and fee tier) or block hashes — and want to pay only for correct answers. The adversarial grading mechanism makes it more trustworthy than a raw RPC call routed through an unverified third party, and the per-query micropayment model is cost-efficient for spot lookups.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T06:35:59.334Z","isFirstParty":false,"canonicalSlug":"taifoon-on-chain-data-query-base-c0dfe3ee"}