Free Children's Fiction audiobooks: public-domain recordings in LibriVox's "Children's Fiction" genre (626 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Ask a question about Pride and Prejudice for a tutoring agent, quiz generator, or reading app — get back matching source passages with surrounding context from the book itself, with chapter and location citations. Retrieval only, full-text search over the real book, not a generated summary or answer. No license, no API key required.

Parse, validate and canonicalize a phone number using Google's libphonenumber metadata. Query: number (required; E.164 like "+14155552671" or national like "(415) 555-2671"), country (optional ISO 3166-1 alpha-2 like US/GB/JP — required when number is not E.164). Returns {input, valid (matches a real number range), possible (right shape/length), e164, national, international, rfc3966, country, countryCallingCode, type (mobile|fixed_line|fixed_line_or_mobile|toll_free|premium_rate|shared_cost|voip|personal_number|pager|uan|voicemail|unknown), possibleCountries[]}. Returns valid:false (not an error) for unparseable input.

A Polymarket trader's portfolio by wallet address: total portfolio USD value plus open positions (market title, outcome, size, average vs current price, current value, and unrealized PnL). For tracking a wallet's prediction-market book. Read-only from Polymarket's Data API.

Find the right 2s endpoint for a task using natural language. Pass q (e.g. 'check if a domain can be spoofed', 'is this CVE being exploited', 'screen a company for sanctions', 'decode a VIN') and get back the catalog's most relevant endpoints, ranked, each with its id, API path, method, group, description, and price. Deterministic keyword + synonym matching over the live endpoint registry (no LLM, no external calls) — a self-routing index so an agent (or its planner) can discover which paid call answers a question instead of reading the whole 290+ endpoint catalog. Returns the path you then call directly.

Live perp funding rates, open interest, and mark/oracle/mid prices across 200+ Hyperliquid perpetuals (free/keyless). Each row: coin, hourly funding rate, open interest, mark/oracle/mid price, premium, prior-day price, 24h notional volume, max leverage. Filter by coin; sort by oi, volume, or funding. On-chain perp microstructure for funding-arb and OI signals.

Search individual US Congress member stock trades, parsed from STOCK Act Periodic Transaction Reports into clean rows. Filter by member name (q, e.g. "Pelosi"), ticker (e.g. NVDA), transaction type (purchase | sale | exchange | partial_sale), party (D | R | I), 2-letter state, chamber, or transaction-date range (dateFrom/dateTo). Each trade returns the member + party + state/district, owner (self/spouse/joint/dependent), ticker + asset description, buy/sell, the disclosed dollar RANGE (amountMin/amountMax — disclosures are ranges, not exact), the transaction date, the disclosure date, days-to-disclose (compliance lag), and a link to the source filing PDF. The envelope total is the full count matching your filter — so ticker=NVDA&type=purchase counts who bought NVIDIA. Amounts are ranges by law; trades are disclosed up to 45 days after they happen (current-to-the-filing). Coverage: US House + Senate e-filed PTRs; scanned/handwritten reports are parsed separately. Data: US House Clerk / US Senate eFD (public domain). Cross-ref /api/gov/congress-filings for the raw filing index.

Fetch any URL and return its article content with the clutter stripped — nav, ads, sidebars, footers, scripts, styles, comments removed via heuristic extraction (<article> / <main> / role=main / densest block). Choose the output with `format`: markdown (default), text, both (JSON envelope), html (a self-contained readable reader-view page, raw text/html), or pdf (a clean typeset reading document, raw application/pdf). html/pdf are built from the same cleaned content, so they carry no live page, no third-party assets, no trackers. SSRF-guarded, 512KB body cap, 8s timeout, 5 redirects max. JSON formats return { url, finalUrl, title, markdown?, text?, wordCount, sourceBytes }. This uses a raw HTTP fetch (no JavaScript) — for client-rendered / SPA pages whose content only appears after JS runs, use /api/url/render (same formats, headless-rendered). For a pixel-perfect image of the live page use /api/ai/screenshot; to enumerate a page or sitemap into its links use /api/url/map.

Free Crime & Mystery Fiction audiobooks: public-domain recordings in LibriVox's "Crime & Mystery Fiction" genre (474 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Reverse geocoding — latitude/longitude → nearest formatted address plus structured components (houseNumber, road, suburb, city, county, state, postcode, country, countryCode). Query: lat (-90..90), lon (-180..180). Underlying data is OpenStreetMap (ODbL). Sister: /api/geocode/address.

Free Christianity - Other audiobooks: public-domain recordings in LibriVox's "Christianity - Other" genre (667 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Payment Lab on-chain settlement receipt — one getTransaction, cached by chain finality — $0.002 USDC

Free Biography & Autobiography audiobooks: public-domain recordings in LibriVox's "Biography & Autobiography" genre (873 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

EU VAT number validation against the official VIES service: valid or invalid, registered name and address, an optional check of the name you expect and, if you give your own VAT number, a VIES consultation number to keep as audit evidence. Norwegian numbers are checked against the Norwegian VAT register. Use when: onboarding an EU supplier or customer, or before paying an invoice.

Historical quarterly earnings surprises for a US-listed company — reported (actual) EPS vs the analyst consensus estimate, the absolute surprise, and the surprise percentage, for the most recent quarters (newest first). Pass ticker (optionally limit). Tells you whether a company has been beating or missing expectations. Data by Finnhub.

Free Horror & Supernatural Fiction audiobooks: public-domain recordings in LibriVox's "Horror & Supernatural Fiction" genre (526 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Resolve any organism by scientific or common name to the GBIF taxonomic backbone — the canonical free reference for life on Earth. Returns the accepted scientific name + canonical name, taxonomic rank and status, the match type/confidence, the full classification (kingdom → phylum → class → order → family → genus → species), up to 8 English vernacular (common) names, the count of recorded occurrences worldwide, and the GBIF species URL. Biodiversity, ecology, education, and as a taxonomy normalizer for other pipelines. Fuzzy-matches misspellings. CC-BY GBIF data.

Cross-venue equivalent-market pairs for arbitrage / relative-value spotting. We fuzzy-match open Polymarket vs Kalshi markets by title-token overlap and return candidate pairs with both venues' YES prices and the implied-probability spread (Polymarket YES minus Kalshi YES). Tune with minScore (0-1 title-similarity floor) and limit. Heuristic — a high score is a strong candidate, not a guaranteed identical contract. Read-only, keyless. No public source maps these directly; the pairing is derived by 2s.io.

Compute the current position of any cataloged Earth-orbiting satellite by NORAD catalog number (e.g. 25544 = ISS, 20580 = Hubble), using fresh Celestrak orbital elements propagated with SGP4. Returns sub-point latitude/longitude, altitude (km), and speed (km/s) for the requested instant (default: now; pass `at` as an ISO timestamp for any time within a few days of the elements' epoch). Supply observer `lat`/`lon` (and optional altKm) to also get look angles — azimuth, elevation, slant range, and whether the satellite is above your horizon — for visual/antenna pointing. Satellite tracking, pass prediction, ground-station planning. Public-domain orbital data; physical/mission metadata is not included.

Assign one of 2 to 12 supplied labels to each of up to 20 short messages, with a confidence; labels outside the supplied list are never returned Route short messages to labels you supply: up to 20 messages and 2 to 12 labels per call, one label pe…