{"uid":"cap_FqCmtLwVALzLqWIlBrfnw","slug":"chainquery-getmempooldescendants-8892aafd","name":"chainquery getmempooldescendants","description":"chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. In-mempool descendants of a transaction from chainquery's independent full node. Bitcoin Core getmempooldescendants.","url":"https://x402.chainquery.com/v1/rpc/getmempooldescendants","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"params":{"type":"string","description":"optional: JSON-encoded array of positional RPC params"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"result":{"description":"getmempooldescendants result"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hRZK7TS_Yp0qVefovauiD","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all in-mempool descendant transactions of a given transaction using Bitcoin Core's getmempooldescendants RPC, via pay-per-call x402 micropayment.","exampleAgentPrompt":"What are all the in-mempool descendants of Bitcoin transaction f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16? Give me the full verbose details.","exampleUseCases":null,"resultDescription":"A JSON object containing the getmempooldescendants result: a map of descendant txids to their mempool entry details including fees, transaction size, weight, time, height, descendant/ancestor counts and fees, and any dependency information as reported by the chainquery independent full node.","failureModes":["Invalid or malformed txid returns RPC error","Transaction not in mempool returns error (transaction not in mempool)","Transaction has no descendants returns empty object","Malformed JSON in params query parameter returns parse error","Payment not included or insufficient returns HTTP 402","Node temporarily unavailable returns connection error"],"whenToPreferThis":"Use this endpoint when you need to trace the descendant chain of an unconfirmed Bitcoin transaction in the mempool — for example, to analyze CPFP (child-pays-for-parent) relationships, assess package fees, or understand transaction dependency graphs — without setting up your own Bitcoin Core node or obtaining an API key. The x402 micropayment model means you pay $0.01 USDC per call with no subscription required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:47:28.487Z","isFirstParty":false}