{"uid":"cap_jJXTmLRo2Y4o8Hq5UcsOg","slug":"synthora-btc-fee-tiers-mempool-congestion-ea1de09c","name":"SYNTHORA BTC Fee Tiers & Mempool Congestion","description":"SYNTHORA btc-fees: Bitcoin fee tiers + mempool congestion, cross-reported from two independent node sources (mempool.space + blockstream.info) with methodology divergence declared. For agents timing BTC transactions. Free sources, no key. $0.005 USDC x402 Base.","url":"https://api.hergertsynthora.com/v1/btc-fees","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"string","description":"SYNTHORA btc-fees: Bitcoin fee tiers + mempool congestion, cross-reported from two independent node sources (mempool.space + blockstream.info) with methodology divergence declared. For agents timing BTC transactions. Free sources, no key. $0.005 USDC x402 Base."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/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_LOvF62Q5R9kmSClTVhA2Q","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 Bitcoin fee tiers and mempool congestion data cross-reported from two independent node sources (mempool.space and blockstream.info) with methodology divergence declared, for optimal BTC transaction timing.","exampleAgentPrompt":"What are the current Bitcoin fee tiers and mempool congestion level — I need to decide whether to send a BTC transaction now or wait, and I want to see how mempool.space and blockstream.info compare on their estimates.","exampleUseCases":[{"title":"Timing a large BTC transfer","prompt":"I need to send a large Bitcoin payment — can you check the current mempool congestion and fee tiers from multiple sources so I know whether to send now or wait for fees to drop?"},{"title":"Automated BTC payout fee selection","prompt":"Before triggering our automated BTC payout batch, pull the current fee tiers and tell me what sat/vbyte rate to use for next-block confirmation vs. a 30-minute window."},{"title":"Divergence alert between fee oracles","prompt":"Check the current Bitcoin fee estimates from both mempool.space and blockstream.info and flag if they're significantly disagreeing — I want to know if there's methodology divergence before I set my wallet fee."}],"resultDescription":"Returns Bitcoin fee tiers (e.g. fast/medium/slow in sat/vbyte), current mempool congestion status, and a cross-comparison between mempool.space and blockstream.info fee estimates, including any declared divergence in methodology between the two data sources.","failureModes":["Upstream source unavailability: if mempool.space or blockstream.info is down, partial or degraded data returned","Stale data: mempool conditions change rapidly; response may lag by seconds to minutes","No methodology consensus: divergence between sources may be large during high-volatility fee periods","Invalid input: malformed request body returns error","Payment failure: x402 micropayment not completed results in 402 response"],"whenToPreferThis":"Choose this endpoint when you need dual-source Bitcoin fee verification with explicit methodology divergence disclosure, rather than a single-oracle fee API. Ideal for agents that must justify fee decisions with cross-validated data, detect fee oracle disagreements, or time BTC transactions based on mempool congestion. Not suitable for Ethereum/EVM chain gas — use SYNTHORA gas-oracle-multi for that.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:41:59.106Z","isFirstParty":false}