# Services from api.cryptoetfsentinel.com on Zero

> api.cryptoetfsentinel.com serves 27 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.cryptoetfsentinel.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.cryptoetfsentinel.com/health.json

## Services

- [Crypto ETF Sentinel — Side-by-Side ETF Comparison](https://www.zero.xyz/c/api-cryptoetfsentinel-com-c6db176b/llms.txt): $0.03/call via x402. Returns a side-by-side comparison of two US spot crypto ETFs including POS AM profiles, XBRL financials, market data, and Fund Health metrics for two specified CIKs.
- [Crypto ETF Sentinel — Recent SEC Filings Feed](https://www.zero.xyz/c/api-cryptoetfsentinel-com-c4e601df/llms.txt): $0.2/call via x402. Returns the 50 most recent SEC filings for US spot crypto ETFs, newest-first, with no data delay and no daily call cap, supporting optional filters by currency, filing type, and date.
- [Crypto ETF Sentinel — Single-Issuer XBRL Snapshot (CIK 0001980994)](https://www.zero.xyz/c/api-cryptoetfsentinel-com-7c5aa98c/llms.txt): $0.02/call via x402. Returns the latest XBRL-extracted financial snapshot (AUM, NAV per share, shares outstanding, expense ratio) for a specific US spot crypto ETF issuer identified by SEC CIK number.
- [Crypto ETF Sentinel – US Spot Crypto ETF Issuer Directory](https://www.zero.xyz/c/api-cryptoetfsentinel-com-a3ec37f7/llms.txt): $1/call via x402. Returns a curated directory of all active US spot crypto ETF issuers with regulatory stage, ticker, exchange, owner, and SEC CIK
- [Crypto ETF Sentinel — Approval Outcome Score](https://www.zero.xyz/c/api-cryptoetfsentinel-com-8a9dd00e/llms.txt): $0.5/call via x402. Returns a 1-99 approval-likelihood score for each under-review US spot crypto ETF issuer, weighted against historical approved and withdrawn filing baselines
- [Crypto ETF Sentinel — Single Issuer POS AM Profile](https://www.zero.xyz/c/api-cryptoetfsentinel-com-9824776e/llms.txt): $0.03/call via x402. Returns the latest POS AM-extracted regulatory profile for one US spot crypto ETF issuer, including custodian, sponsor fee, authorized participants, in-kind eligibility, and basket size, identified by SEC CIK.
- [Crypto ETF Sentinel — Quarterly Aggregate AUM Growth by Asset Category](https://www.zero.xyz/c/api-cryptoetfsentinel-com-e0f0cc3d/llms.txt): $0.1/call via x402. Returns quarterly aggregate AUM growth across all US spot crypto ETFs, bucketed by BTC, ETH, and Other asset categories, for market sizing and QoQ momentum tracking.
- [Crypto ETF Sentinel — Fee War History](https://www.zero.xyz/c/api-cryptoetfsentinel-com-340fbcb2/llms.txt): $0.1/call via x402. Returns quarterly average and median expense ratios over time across the US spot crypto ETF cohort, documenting fee compression since the January 2024 spot Bitcoin ETF launch.
- [Crypto ETF Sentinel — XBRL Historical Time Series by CIK](https://www.zero.xyz/c/api-cryptoetfsentinel-com-125fd54f/llms.txt): $0.1/call via x402. Returns a quarterly historical time series for a single XBRL financial concept (AUM, NAV, shares outstanding, expense ratio, etc.) for one US spot crypto ETF issuer identified by SEC CIK.
- [Crypto ETF Sentinel — Top-N Pre-Approval Issuer Filing Velocity](https://www.zero.xyz/c/api-cryptoetfsentinel-com-51e06f2a/llms.txt): $0.5/call via x402. Returns the top-N most-active pre-approval US spot crypto ETF issuers ranked by 42-day SEC action-filing count, signaling imminent regulatory stage transitions.
- [Crypto ETF Sentinel — US Spot Crypto ETF Market Snapshot](https://www.zero.xyz/c/api-cryptoetfsentinel-com-cb0fd20b/llms.txt): $0.05/call via x402. Returns a single-call pipeline snapshot of the entire US spot crypto ETF market: DB totals, filings broken down by cryptocurrency and form type, regulatory-stage counts, and an as_of timestamp for stale-checking.
- [Crypto ETF Sentinel Pipeline Deltas](https://www.zero.xyz/c/api-cryptoetfsentinel-com-00a535e9/llms.txt): $0.1/call via x402. Returns week-over-week delta metrics for the US spot crypto ETF approval pipeline: changes in stage counts, filings in last 7 days, and under-review count vs. a prior daily snapshot.
- [Crypto ETF Sentinel XBRL Leaderboard](https://www.zero.xyz/c/api-cryptoetfsentinel-com-550428b6/llms.txt): $0.1/call via x402. Returns a ranked list of top-N US spot crypto ETF issuers ordered by an XBRL TIER1 financial concept such as AUM in USD, using daily-updated regulatory data.
- [Crypto ETF Sentinel — SEC Comment-Letter History for CIK 0001980994](https://www.zero.xyz/c/api-cryptoetfsentinel-com-b956557b/llms.txt): $0.02/call via x402. Returns the full chronological SEC ↔ issuer comment-letter history (UPLOAD/CORRESP pairs) for a specific crypto ETF issuer (CIK 0001980994), with review-intensity classification to gauge approval proximity.
- [Crypto ETF Sentinel — Per-Issuer Risk Scores](https://www.zero.xyz/c/api-cryptoetfsentinel-com-44a8d126/llms.txt): $0.5/call via x402. Returns a composite risk score (0–99) for every US spot crypto ETF currently under SEC review, factoring in filing cadence, time-in-stage, comment-letter intensity, and historical approval baselines.
- [Crypto ETF Sentinel – Stalled Under-Review Issuers](https://www.zero.xyz/c/api-cryptoetfsentinel-com-206cdd59/llms.txt): $0.1/call via x402. Returns US spot crypto ETF issuers under SEC review that have been stalled 148+ days without comment-letter activity, sorted by days-since-last-activity descending
- [Crypto ETF Sentinel – XBRL Time Series for Single Issuer](https://www.zero.xyz/c/api-cryptoetfsentinel-com-8cd5d210/llms.txt): $0.02/call via x402. Returns a historical quarterly time series for one XBRL concept (AUM, NAV, shares outstanding, expense ratio, etc.) for a specific crypto ETF issuer identified by CIK.
- [Crypto ETF Sentinel — Recent Notable SEC Filings & Comment Letters Feed](https://www.zero.xyz/c/api-cryptoetfsentinel-com-3b09fe94/llms.txt): $0.1/call via x402. Returns an activity feed of recent notable SEC filings and comment letters for US spot crypto ETFs, filtered to drop trading-stage housekeeping noise, covering the last 60 days by default.
- [Crypto ETF Sentinel — SEC Comment-Letter History by Issuer CIK](https://www.zero.xyz/c/api-cryptoetfsentinel-com-ef70aaac/llms.txt): $0.05/call via x402. Returns the full chronological SEC ↔ issuer comment-letter history (UPLOAD/CORRESP pairs with review-intensity classification) for a single US spot crypto ETF issuer identified by SEC CIK.
- [Crypto ETF Sentinel — POS AM Profile History for One Issuer](https://www.zero.xyz/c/api-cryptoetfsentinel-com-baa2770c/llms.txt): $0.05/call via x402. Returns the chronological evolution of a US spot crypto ETF issuer's regulatory profile (custodian, fee, authorized participants, in-kind mechanics) derived from successive POS AM SEC filings, identified by SEC CIK.
- [Crypto ETF Sentinel — Fee War (Expense Ratio Leaderboard)](https://www.zero.xyz/c/api-cryptoetfsentinel-com-f7956c37/llms.txt): $0.1/call via x402. 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.
- [Crypto ETF Sentinel — Single-Issuer XBRL Snapshot](https://www.zero.xyz/c/api-cryptoetfsentinel-com-24da2996/llms.txt): $0.05/call via x402. Returns the latest XBRL-extracted financial snapshot (AUM, NAV per share, shares outstanding, expense ratio) for a single US spot crypto ETF issuer identified by SEC CIK.
- [Crypto ETF Sentinel – Latest POS AM Profile for Single Issuer](https://www.zero.xyz/c/api-cryptoetfsentinel-com-03f6687b/llms.txt): $0.02/call via x402. Returns the most recent POS AM-extracted ETF profile for a single issuer, including custodian, sponsor fee, authorized participant list, in-kind eligibility, and basket size.
- [Crypto ETF Sentinel — Issuer Profile Evolution History](https://www.zero.xyz/c/api-cryptoetfsentinel-com-5e733322/llms.txt): $0.03/call via x402. Returns a chronological history of profile changes (custodian, fee, authorized participants, in-kind redemption deltas) for a single crypto ETF issuer, derived from successive POS AM SEC filings.
- [Crypto ETF Sentinel — Cohort Wave State](https://www.zero.xyz/c/api-cryptoetfsentinel-com-4fb1eff2/llms.txt): $0.5/call via x402. Returns whether a given cryptocurrency is currently in an active SEC approval wave for US spot ETFs, including wave anchor dates, anchor ticker, and approved vs pending cohort member counts.
- [Crypto ETF Sentinel Bulk Profiles](https://www.zero.xyz/c/api-cryptoetfsentinel-com-7dcbf31f/llms.txt): $0.5/call via x402. Returns POS AM-extracted profiles for every currently trading US spot crypto ETF, including custodian, sponsor fee, authorized participants, basket size, and in-kind eligibility.
- [Crypto ETF Sentinel Launch Monitor](https://www.zero.xyz/c/api-cryptoetfsentinel-com-6d8e64e4/llms.txt): $0.5/call via x402. Returns days-waiting and percentile ranking vs historical baselines for US spot crypto ETF issuers currently in the 'launch_imminent' stage, including p50/p75/p90 historical CERT/EFFECT distribution benchmarks.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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