{"uid":"cap_S3ZkYBPQZwxPI5-Qp0J4H","slug":"etf-brief-spot-bitcoin-ethereum-etf-flow-summary-9536fc27","name":"ETF Brief – Spot Bitcoin/Ethereum ETF Flow Summary","description":"Fusion flow brief for spot Bitcoin or Ethereum ETFs in ONE call: latest total net flow, the inflow/outflow streak, the window cumulative, flow momentum, issuer concentration, total AUM and a deterministic accumulation, distribution or neutral verdict. Saves several issuer queries plus the differencing.","url":"https://api.agentstools.dev/etf/brief","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["asset","region"],"properties":{"asset":{"enum":["btc","eth"],"type":"string","description":"Crypto asset whose spot ETFs to report: btc or eth."},"region":{"enum":["us","hk"],"type":"string","description":"ETF listing region: us (live) or hk (scaffold)."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_adTOkc2FUbHh4XU7_cku6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a one-call aggregated brief for spot BTC or ETH ETFs including net flow, inflow/outflow streak, cumulative window flow, momentum, issuer concentration, total AUM, and an accumulation/distribution/neutral verdict.","exampleAgentPrompt":"Give me the full ETF flow brief for spot Bitcoin ETFs in the US — net flow, streak, momentum, issuer concentration, AUM, and whether the market is in accumulation or distribution.","exampleUseCases":[{"title":"Bitcoin ETF accumulation check","prompt":"Is money flowing into or out of US spot Bitcoin ETFs right now? Give me the full brief including AUM, net flow, and whether it's an accumulation or distribution signal."},{"title":"Ethereum ETF momentum monitor","prompt":"Pull the ETF flow brief for spot Ethereum in the US — I want to see the inflow/outflow streak, momentum, and the verdict on whether ETH ETFs are being accumulated or distributed."},{"title":"Crypto ETF AUM and concentration snapshot","prompt":"What's the current total AUM and issuer concentration for spot Bitcoin ETFs in the US? Also tell me the net flow trend and give me the accumulation/distribution verdict."}],"resultDescription":"A structured JSON object containing: latest total net flow (USD), the current inflow or outflow streak length, cumulative flow over the reporting window, flow momentum indicator, issuer concentration metric, total AUM across all issuers, and a deterministic categorical verdict of 'accumulation', 'distribution', or 'neutral' — all in a single response without requiring multiple issuer-level queries.","failureModes":["Invalid asset value (not 'btc' or 'eth') returns a validation error","Invalid region value (not 'us' or 'hk') returns a validation error","HK region may return scaffold/incomplete data as it is noted as a scaffold","Payment failure or missing x402 payment header results in 402 response","Upstream data source unavailability may result in stale or missing flow data"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, pre-computed ETF flow intelligence brief for spot Bitcoin or Ethereum ETFs in a single API call, avoiding the need to query multiple issuer endpoints and perform your own differencing and aggregation. Ideal for agents that need a fast, deterministic accumulation/distribution verdict alongside AUM and momentum without building custom analytics pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:49:57.184Z","isFirstParty":false}