{"uid":"cap_GkvRWNAx5bfvsQnM2Jv7m","slug":"glassnode-mempool-transaction-size-distribution-by-fee-rate-aca1a97c","name":"Glassnode Mempool Transaction Size Distribution by Fee Rate","description":"Mempool Total Size of Transactions by Relative Fee (Sat / vByte) — The total size of transactions waiting in the mempool, denominated in virtual bytes and broken out by relative fee (sat/vByte) cohort. Data by Glassnode.","url":"https://x402.glassnode.com/v1/metrics/mempool/txs_size_distribution","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":["a"],"properties":{"a":{"enum":["BTC"],"type":"string","description":"Asset symbol, e.g. BTC, ETH"},"c":{"enum":["native"],"type":"string","description":"Currency for denominated values, e.g. usd, native"},"f":{"enum":["csv","json"],"type":"string","description":"Response format: json or csv"},"i":{"enum":["24h"],"type":"string","description":"Time interval / resolution, e.g. 24h, 1w, 1month"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"array","items":{"type":"object","properties":{"o":{"type":"object"},"t":{"type":"number"}}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gCpk4IaPw6Ru-kCADLYMl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the total size (in virtual bytes) of Bitcoin transactions waiting in the mempool, broken down by sat/vByte fee rate cohorts, over a 24-hour interval.","exampleAgentPrompt":"Can you pull the latest Glassnode mempool transaction size distribution for BTC in JSON format so I can see how many virtual bytes are queued at each sat/vByte fee cohort?","exampleUseCases":null,"resultDescription":"An array of timestamped objects, each containing a breakdown of the total virtual byte size of unconfirmed Bitcoin transactions grouped by sat/vByte fee rate cohorts, representing a snapshot of mempool congestion levels across different fee tiers.","failureModes":["Missing required 'a' (asset) parameter returns a 400 validation error","Unsupported asset symbol (non-BTC) returns a 400 or 422 error","Payment not included or insufficient USDC causes a 402 Payment Required response","Invalid format parameter ('f') returns a 400 error","Service unavailability or upstream Glassnode data delay causes a 503 or 504 error"],"whenToPreferThis":"Use this endpoint when you need granular, fee-rate-segmented mempool size data from Glassnode specifically — ideal for fee estimation tooling, on-chain analysts, or dashboards that need to understand mempool congestion across multiple sat/vByte tiers rather than just aggregate mempool size. Prefer this over generic blockchain explorers when you need structured, time-series data with fee cohort breakdown.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:35:03.025Z","isFirstParty":false}