{"uid":"cap_uc8UMdA4vid5cqyPwlOGX","slug":"scriptmasterlabs-btc-mempool-fees-api-1f2f39fa","name":"ScriptMasterLabs BTC Mempool Fees API","description":"Pay-per-call crypto, RWA, federal, SEC, and compliance APIs. Settled in USDC on Base via x402. Hyphen routes only (e.g. /x402/rwa-aggregates, /x402/gas-tracker).","url":"https://acp-x402-discovery.onrender.com/x402/btc-mempool-fees","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"example":{}},"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_gPdxelaOop70VdMKADDdm","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 current Bitcoin mempool fee estimates (e.g. slow, standard, fast sat/vB rates) via a pay-per-call x402/USDC endpoint","exampleAgentPrompt":"What are the current Bitcoin mempool fee rates — give me the slow, standard, and fast sat/vB estimates so I can decide how to price my transaction right now.","exampleUseCases":[{"title":"Optimal BTC transaction fee selection","prompt":"What fee rate should I use for my Bitcoin transaction if I want it confirmed within the next block? Give me the current fast sat/vB rate from the mempool."},{"title":"Wallet fee suggestion feature","prompt":"Pull the current Bitcoin mempool fees for slow, standard, and fast confirmation tiers — I need to display these to users in my wallet app so they can choose their priority."},{"title":"Mempool congestion monitoring alert","prompt":"Check the Bitcoin mempool fee rates right now and let me know if the fast confirmation fee has spiked above 50 sat/vB — I want to know if the network is congested."}],"resultDescription":"Returns current Bitcoin mempool fee estimates broken down by priority tier (slow, standard, fast), expressed in satoshis per virtual byte (sat/vB), reflecting real-time mempool congestion conditions. Response is a JSON object with fee rate data per confirmation speed tier.","failureModes":["Payment failure: x402 USDC payment on Base not processed — endpoint returns 402 Payment Required","Upstream mempool data source unavailable — may return 503 or empty/stale data","Malformed or empty response body if the underlying mempool feed is down","Rate limiting or provider outage on Render-hosted service causing timeouts"],"whenToPreferThis":"Choose this endpoint when you need real-time Bitcoin mempool fee estimates in a pay-per-call micro-payment model settled in USDC on Base via the x402 protocol. Prefer it in automated agent workflows that need on-demand BTC fee data without a subscription, or when integrating with x402-native payment infrastructure. Alternative free endpoints (mempool.space API, Blockstream) may be preferred for high-volume or unauthenticated use cases.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:46:24.524Z","isFirstParty":false}