{"uid":"cap_U6ys4QedWEe1m0Tqcq_0k","slug":"bitcoin-transaction-fee-estimator-mempool-space-5e5ba3dd","name":"Bitcoin Transaction Fee Estimator (mempool.space)","description":"Recommended Bitcoin transaction fee rates by confirmation speed, via mempool.space API","url":"https://finance-api.kdlcfa.workers.dev/btc-fee-estimate","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":[],"properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_sK6vXW1ZTETgkylcg_Pp0","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 recommended Bitcoin transaction fee rates (sat/vB) by confirmation speed, sourced from mempool.space","exampleAgentPrompt":"What are the current recommended Bitcoin transaction fee rates — fastest, half-hour, and economy — right now?","exampleUseCases":[{"title":"Urgent BTC payment fee check","prompt":"I need to send Bitcoin urgently — what fee rate should I use to get it confirmed in the next block?"},{"title":"Economy fee for non-urgent transfer","prompt":"I'm sending some Bitcoin but I'm not in a rush — what's the cheapest fee rate I can use and still get confirmed within an hour?"},{"title":"Fee monitoring for wallet app","prompt":"What are the current Bitcoin mempool fee estimates for fastest, half-hour, and one-hour confirmation speeds?"}],"resultDescription":"An object containing recommended Bitcoin fee rates in sat/vB for different confirmation speed tiers: fastest (next block), half-hour, one-hour, economy, and minimum fee. Sourced in real-time from the mempool.space API.","failureModes":["mempool.space API unavailable or rate-limited — upstream error returned","Network timeout if Bitcoin mempool data is temporarily inaccessible","Payment required error (402) if USDC payment header is missing or invalid"],"whenToPreferThis":"Use this endpoint when you need current, real-world Bitcoin fee recommendations broken down by confirmation urgency, especially when building wallets, payment tools, or fee-optimization agents. Prefer over static fee tables or exchange-provided estimates because it reflects live mempool conditions via mempool.space.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:43:29.453Z","isFirstParty":false}