{"uid":"cap_3BdcOzrk6rRgMv-bOZaTN","slug":"2s-io-bitcoin-mempool-state-6727f385","name":"2s.io Bitcoin Mempool State","description":"Bitcoin mempool state (free/keyless): current unconfirmed tx count, total vsize, and total fees, plus the most recent transactions (whale radar) — filter with minBtc to surface only large pending transfers. For congestion monitoring and large-transfer alerts.","url":"https://2s.io/api/crypto/btc-mempool","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","properties":{"minBtc":{"type":"number","minimum":0,"description":"Only include recent txs >= this BTC value."}},"additionalProperties":false}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0036","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":"$0.0036/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0036","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1MQU7soBpF2A3jfc77xy0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0036","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 stats (unconfirmed tx count, total vsize, total fees) plus recent transactions filterable by minimum BTC amount for whale/large-transfer monitoring.","exampleAgentPrompt":"What's the current state of the Bitcoin mempool — how many unconfirmed transactions are there, what are the total fees, and can you show me any pending transfers worth at least 5 BTC?","exampleUseCases":null,"resultDescription":"Returns current Bitcoin mempool statistics including total unconfirmed transaction count, aggregate vsize, and total pending fees, along with a list of recent mempool transactions optionally filtered to only those above a specified BTC threshold (whale radar).","failureModes":["Network or upstream Bitcoin node unavailability returning 5xx errors","Invalid minBtc value (negative number) returning a validation error","Mempool data temporarily stale if node sync is delayed","Empty recent transactions array if no transactions meet the minBtc threshold"],"whenToPreferThis":"Use this endpoint when you need real-time Bitcoin mempool data without an API key — ideal for congestion monitoring dashboards, fee estimation context, or whale-watching alerts. Prefer this over on-chain confirmed transaction APIs when you specifically need pending/unconfirmed transaction data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:57:53.655Z","isFirstParty":false}