{"uid":"cap_sQitnArdD7xxH5XtQG6L2","slug":"glassnode-probably-lost-btc-supply-5c985719","name":"Glassnode Probably Lost BTC Supply","description":"Probably Lost Supply — The estimated supply of \"zombie\" BTC, coins that have been inactive since the launch of the first BTC exchange in July 2010. Patoshi-mined coins are included in this category. Data by Glassnode.","url":"https://x402.glassnode.com/v1/metrics/supply/probably_lost","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","usd"],"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":{"t":{"type":"number"},"v":{"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_YczrqWQpOR983B3QMzeXV","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 estimated supply of 'zombie' BTC coins inactive since the first exchange launch in July 2010, including Patoshi-mined coins.","exampleAgentPrompt":"What does Glassnode estimate as the probably lost Bitcoin supply — the zombie coins inactive since the first BTC exchange launched in July 2010, including Patoshi-mined coins? Give me the latest figure in native BTC.","exampleUseCases":[{"title":"Analyze lost Bitcoin in portfolio risk","prompt":"I'm doing a report on effective Bitcoin circulating supply for investors. Can you grab Glassnode's probably lost supply metric — those zombie coins dormant since 2010 — and tell me what percentage that represents of the total supply? I need the latest number."},{"title":"Track historical zombie coin trends","prompt":"Show me how Glassnode's estimate of probably lost Bitcoin has changed over time. I want to see if the dormant supply figure has stayed constant or if new data has adjusted their zombie coin estimates."},{"title":"Compare Satoshi's unmoved coins","prompt":"How many of the Patoshi-mined coins does Glassnode include in their probably lost Bitcoin estimate? I'm trying to understand how much of Satoshi's original mining output is still sitting inactive."}],"resultDescription":"Returns a time-series array of objects, each with a Unix timestamp (t) and the estimated probably-lost BTC supply value (v), representing coins considered permanently dormant since before July 2010.","failureModes":["Missing required 'a' query parameter (must be 'BTC') returns 400 error","Invalid currency or format enum value returns 400 error","Payment not processed or insufficient USDC balance returns 402 Payment Required","Rate limiting or quota exceeded returns 429","Glassnode upstream data unavailable returns 503"],"whenToPreferThis":"Use this endpoint when you need Glassnode's authoritative estimate of permanently lost Bitcoin supply, specifically the 'probably lost' metric covering pre-exchange-era dormant coins and Patoshi-mined BTC. Prefer this over generic supply endpoints when the research focus is on zombie coins, lost supply estimation, or effective circulating supply analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:59:01.156Z","isFirstParty":false}