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Crypto ETF Sentinel — Crypto ETF AUM leaderboard: top-N US spot crypto ETF issuers ranked by assets under management (or another XBRL TIER1 concept). See the largest Bitcoin, Ethereum and other crypto ETFs by fund size, from daily-updated XBRL facts.

Crypto ETF Sentinel — Crypto ETF fee comparison: current expense ratio for every trading US spot crypto ETF, sorted cheapest first — compare fees and find the lowest-cost Bitcoin, Ethereum and other crypto ETFs. Outlier-capped at 200bps to drop bad XBRL extractions.

Crypto ETF Sentinel — Historical time series for one XBRL concept (AUM, NAV, shares-outstanding, etc.) on one US spot crypto ETF issuer. Quarterly cadence. Pass the issuer's SEC CIK as the ``cik`` query param.

Crypto ETF Sentinel — Under-review US spot crypto ETF issuers stalled 148+ days without comment-letter activity (a proxy for SEC inactivity). Sorted by days-since-last-activity descending. Long stalls historically correlate with withdrawal risk.

Crypto ETF Sentinel — Week-over-week pipeline delta for US spot crypto ETFs: change in stage counts, filings-7d, under-review count vs. a prior daily snapshot. Returns 404 (no charge) when no snapshot exists for the requested ``days_back``.

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Validate and describe a five-field cron schedule for $0.001 USDC, including the next runs. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Reads the visible order book of one exchange and measures how bid and ask volume sit inside a window of depth_pct around the mid. imbalance runs from -1 (only asks) to +1 (only bids) and is computed on quote turnover, not on level counts. pressure is the plain classification kauf, verkauf or ausgeglichen and the threshold behind it is returned in thresholds_used, never hidden in code. A wall is a level larger than five times the median level size in the same window; that median is part of the an

Queries every public RPC endpoint this hub knows for a chain in parallel — at least three, usually five — and reports what each one says instead of trusting one. Disagreement is the valuable finding: a single endpoint that lags or serves a different fork is exactly the failure mode this endpoint is built to expose, so agreement is reported per endpoint and the tolerance in blocks is derived from that chain's block time and stated. Beyond height it compares the actual block hash six blocks deep a

Vollständiges Domainprofil: A/AAAA/MX/NS/TXT/CNAME/SOA, Mail-Setup (SPF, DMARC, DKIM-Hinweis, MTA-STS), TLS-Zertifikat mit Restlaufzeit, WHOIS-Kerndaten, Registrierbarkeit und Subdomains aus Certificate Transparency.

Queries Binance, Coinbase, Kraken, OKX and Bybit in parallel for one BASE/QUOTE pair, four seconds per exchange. An exchange that does not answer drops out with a stated reason and the call stays valid; venues_failed lists them. oldest_age_ms is mandatory and states the age of the oldest quote that entered the comparison, because differences taken from unequal points in time are the most common error in this kind of table. With an optional size the visible book of each exchange is walked as well

Compares the open interest recorded now with the value this hub recorded itself at the start of the window, so both numbers come from the same source and the same basis. Notional value is always taken with the price of its own point in time, never recomputed with the current price. price_change_pct and volume_change_pct cover exactly the same window from the recorded minute candles. interpretation follows a rule printed in the answer, so a buyer can recompute it: price and open interest rising t

Convert between wei and ether using fixed 1e18 scaling without RPC — call when converting wei↔ether with fixed 1e18 scaling. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web searc…

Measure top-account and top-three revenue concentration without returning account values. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base or Solana. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains resp…

Compute percent return between start and end values — call when computing percent return between two values. Use on caller-supplied ticks/returns when agents need signal prep without a licensed live market feed (ottoai-class demand, first-party transform). Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search, or media gen…

Email verification and deliverability check without sending anything: syntax, MX records, disposable-domain detection (121k+ known domains), role-account and free-provider flags. JSON verdict with a bounce/deliverability risk level. Validate emails for signup fraud prevention, list hygiene and lead qualification. $0.004 USDC per call, pay via x402, no API key.

Embeds one request and a provided tool list locally, then returns deterministic similarity ranks and the selected tool.

Prüft eine europäische Umsatzsteuer-Identifikationsnummer auf Länderpräfix, Länge, Zeichenvorrat und Prüfziffer, soweit das Verfahren je Land festgelegt ist, und fragt anschließend den VIES-Dienst der EU-Kommission ab. Liefert Firmenname ohne Rechtsformzusatz, Rechtsform getrennt und die Anschrift zerlegt, sofern der Mitgliedstaat sie herausgibt. Optional werden das Impressum einer Website und ein erwarteter Firmenname abgeglichen. Auskunft, keine steuerliche Bestätigung.

Prueft die bekannten Konventionspfade einer Domain auf OpenAPI, MCP, x402, GraphQL, Feeds, llms.txt, security.txt und strukturierte Daten und wertet die Verweise der Startseite mit aus. Liefert je Fund Art, URL, Statuscode und eine Kurzfassung des Inhalts sowie eine Kennzahl fuer die Agententauglichkeit.

Reads the public option book summaries of Deribit and aggregates them per expiry. iv_atm is the mark implied volatility of the strike closest to the forward, averaged over call and put, and the strike used is named. term_structure lists iv_atm against days to expiry. put_call_ratio is reported twice and never mixed: once by 24h volume and once by open interest. open_interest_by_strike and key_strikes show where positions actually sit, above and below the forward. max_pain comes with the complete

Reads the contract itself rather than a project's claims. Ownership renouncement is checked, not believed: the zero address in owner() is evidence, a sentence in a whitepaper is not. Dangerous functions are found by their four-byte selectors in the runtime bytecode, and every finding names the function and the selector — a selector that is merely absent from the dispatch table is not reported. Whether a function is actually restricted is then tested by simulating the call from a neutral address

In search mode, finds UK companies by name. In monitor mode, fetches the current company profile and filing history and compares it with the transaction id or filing date supplied by the caller. The response states whether the baseline was found and lists filings newer than that baseline. This is a pull comparison, not a subscription or push alert. Requests are rate-limited in code below the Companies House ceiling of 600 requests per five minutes.