{"uid":"cap_5Qdnz7wQhgtBwr9Whtr1q","slug":"api-cryptoetfsentinel-com-f7956c37","name":"Crypto ETF Sentinel — Fee War (Expense Ratio Leaderboard)","description":"Crypto ETF Sentinel — Crypto ETF fee comparison: current expense ratio for every trading US spot crypto ETF, cheapest first, outlier-capped at 200 bps to drop bad XBRL extractions. Use when finding the lowest-cost Bitcoin, Ethereum or other crypto ETF, or benchmarking a fee. Optional crypto filter.","url":"https://api.cryptoetfsentinel.com/v1/xbrl/fee-war","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"data":[{"cik":"0001980994","name":"iShares Bitcoin Trust","ticker":"IBIT","fee_bps":25,"fee_pct":"0.25%"}],"meta":{"total":1}}},"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"_truncated":true,"_originalSize":16375}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ymAc_VpeVm578mlmXmKIy","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current expense ratio for every trading US spot crypto ETF, sorted cheapest first, with outliers capped at 200bps to filter bad XBRL extractions.","exampleAgentPrompt":"Pull up the current expense ratio leaderboard for all trading US spot crypto ETFs — I want to see which ones are cheapest, sorted from lowest fee to highest, with bad XBRL outliers filtered out.","exampleUseCases":[{"title":"Finding the cheapest crypto ETF for a client","prompt":"Help me find the lowest-cost US spot crypto ETF right now — pull up the full fee leaderboard so I can recommend the most expense-efficient option to my client who's looking to invest in Bitcoin."},{"title":"Monitoring crypto ETF fee war dynamics","prompt":"Can you keep tabs on how crypto ETF fees are moving week over week? I want to track when the major issuers cut their expense ratios and see if there's a competitive pricing trend emerging across spot Bitcoin and Ethereum ETFs."},{"title":"Comparing management fees across issuers","prompt":"Show me how the different crypto ETF issuers stack up on fees right now — I'm trying to understand which companies are being most aggressive on pricing and whether any of them have recently dropped their costs to stay competitive."}],"resultDescription":"An array of all currently trading US spot crypto ETFs ordered by expense ratio ascending, with each entry including ticker, issuer, and expense ratio in basis points. Values are outlier-capped at 200bps to exclude likely XBRL extraction errors. Includes pagination metadata (total, limit, offset) and an error field.","failureModes":["No ETFs in trading status — empty data array returned","XBRL source data temporarily unavailable — stale or partial results","Payment not included or insufficient — 402 Payment Required response","Rate limit exceeded — HTTP 429","Upstream SEC XBRL pipeline outage — error field populated in response"],"whenToPreferThis":"Use this endpoint when you need a ranked, clean snapshot of all live US spot crypto ETF fees in one call — especially for fee competition analysis, cheapest-fund selection, or monitoring fee-cutting events. Prefer over single-issuer endpoints when you need the full cohort view rather than one fund's details.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:43:29.118Z","isFirstParty":false}