{"uid":"cap_e_4XyCsAhRW5mAJaNIHgI","slug":"api-x402node-dev-7a1b82fb","name":"Bitcoin Recommended Fee Rates API","description":"Bitcoin recommended fee rates (sat/vB) for fast/half-hour/hour/economy/minimum via mempool.space. Use no params. Built for AI agents constructing BTC transactions, fee estimation UIs. Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/chain/btc-fees","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_MjitC9XIzShzSQFa5yPWj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current Bitcoin recommended fee rates in sat/vB across five priority tiers (fastest, half-hour, hour, economy, minimum) sourced from mempool.space","exampleAgentPrompt":"What are the current Bitcoin fee rates — I need the sat/vB recommendations for fast, half-hour, hour, economy, and minimum priority so I can pick the right one for my transaction.","exampleUseCases":null,"resultDescription":"Returns five fee rate tiers in sat/vB: fastest (next block), half-hour confirmation, one-hour confirmation, economy, and minimum. Values are sourced live from mempool.space and reflect current mempool conditions.","failureModes":["mempool.space upstream unavailable — proxy may return 502 or error JSON","Stale data if mempool.space cache is lagged during high-traffic periods","Payment failure (x402 protocol) if USDC balance is insufficient — returns 402","No parameters accepted; passing a body may be ignored or cause unexpected behavior"],"whenToPreferThis":"Use this endpoint when an AI agent or application needs current Bitcoin fee rate recommendations without requiring a mempool.space API key. Ideal for transaction construction workflows, fee estimation UIs, or wallet tooling that needs all five priority tiers in a single call. Prefer over direct mempool.space calls when operating in an x402 micropayment environment or when a no-auth, pay-per-call model is preferred.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:08:50.891Z","isFirstParty":false}