Estimate token count and cost for text across LLM models (GPT-4o, Claude, Gemini, Mistral, Llama). Algorithmic — no API calls.

x402engine — Reverse-resolve an Ethereum address to its ENS name

Locus public pay-per-use API

Extract product reviews from a product or review page. Returns rating distribution, pros/cons, sentiment. Trustpilot is not supported (their ToS forbids automated access).

Fetch npm package metadata: version, dependencies, downloads, repository, license. Includes weekly download count.

EconDash economic data API (M2M)

Resolve a researcher by ORCID iD. Pass orcid (e.g. 0000-0002-1825-0097, with or without the https://orcid.org/ prefix). Returns the researcher name, affiliations (employments and educations with organization, role, department, years, and a current flag), a total works count, and a works summary (title, type, year, DOI when present). Data: ORCID Public API, free and keyless; per-record visibility is set by the record holder. The canonical author key in scholarly metadata — pair with /api/papers/search, /api/paper/doi-lookup, and /api/research/org (ROR institutions). Use to verify an author identity, current institution, or publication record before citing.

Full-text search across all of Hacker News (via the Algolia HN API). Search stories or comments by keyword, sorted by relevance or by date (newest first). Filter by tags (story/comment/ask_hn/show_hn/poll) and by author. Each hit: title, URL, author, points, comment count, story/comment text, created time, and canonical HN URL. Net-new vs news.hn-top (curated feeds) and news.search (general news).

Official US weather forecast for a coordinate (US land + territories). Pass lat + lon. Returns the National Weather Service forecast as a list of periods — by default ~7 days of day/night periods; pass hourly=true for an hour-by-hour forecast. Each period gives the temperature + unit, wind speed/direction, chance of precipitation, and a short + detailed forecast, plus the resolved city/state and issuing office. Source: US National Weather Service (api.weather.gov), public domain. For active warnings use weather.alerts.

Official Norwegian company registry search (Brønnøysund Enhetsregisteret). Search by company name. Each result: organisation number, name, organisation form, primary industry (NACE), employee count, registration date, website, bankruptcy and dissolution flags, and business address. Free, NLOD/CC BY 4.0. The authoritative NO company lookup — complements business.uk-companies and business.lei.

TLD registry intelligence and public-suffix analysis. Mode 1 (tld=io): IANA root-zone metadata — type (generic / country-code / sponsored), managing organization, unicode form for IDN TLDs. Mode 2 (domain=shop.example.co.uk): full Public Suffix List algorithm — the effective public suffix (co.uk), the registrable domain (example.co.uk), the subdomain part, the matched PSL rule, and whether the suffix is ICANN (registry) or private (corporate, e.g. github.io / s3.amazonaws.com) — plus the root-zone metadata for its TLD. Correctly handles wildcard and exception rules and IDN/punycode input. Use for cookie scoping, per-registrant rate limiting, URL dedup, and abuse/phishing analysis. Data: IANA root zone + Mozilla PSL, refreshed weekly.

Convert Chinese (Hanzi) text to pinyin romanization. Choose tone marks (symbol, e.g. hàn yǔ), numbered tones (han4 yu3), or no tones. Auto-segments words and returns the full pinyin string plus a per-syllable array. Deterministic, keyless — useful for transliteration, pronunciation, search indexing, and TTS prep.

English dictionary lookup via dictionaryapi.dev (Wiktionary-sourced). Returns full entries with IPA phonetic transcription(s), audio pronunciation URLs, and meanings grouped by part of speech. Each meaning carries definitions with usage examples and per-definition synonyms + antonyms. CC BY-SA 3.0/4.0 — attribute when redistributing. Useful for vocabulary agents, writing assistants, language-learning tools.

Fetch any URL and extract structured page metadata: title, description, og:image, canonical, favicon, site name, author, published time, language, and the first ~500 chars of body text. SSRF-guarded against private networks. 8s timeout, 512 KB max body. Returns the parsed metadata plus the raw og:/twitter:/itemprop meta dictionary for inspection.

Look up the visa requirement for a traveler with a given passport visiting a destination country. Pass passport and destination as ISO-3166 alpha-3, alpha-2, or country name (e.g. passport=USA destination=Japan). Returns the requirement category — 'visa free' (with visaFreeDays, the allowed days), 'visa on arrival', 'e-visa', 'eta' (electronic travel authorization), 'visa required' (must arrange in advance), or 'no admission' — plus a plain-language description and the resolved passport/destination names. Data from the community-maintained Passport Index dataset (MIT). Informational only — not official immigration advice; verify with the destination's embassy before travel.

Look up or search UN/LOCODE — the United Nations Code for Trade and Transport Locations (~116k locations, all countries). Pass `locode` for an exact code (e.g. USNYC or 'US NYC'). Or pass `query` to search location names, optionally filtered by `country` (ISO 3166 alpha-2) and `function` (port, rail, road, airport, postal, multimodal, fixed, border). Each result: locode, name, country, subdivision, transport functions, entry status, IATA code where it differs, and coordinates. UN/LOCODE is the standard location identifier in shipping schedules, EDI messages, and customs documents.

NBA players from balldontlie — search by name and page through results. Each player: id, name, position, height, weight, jersey number, college, country, draft year, and current team. Cursor-paginated (pass meta.cursor as cursor to continue).

x402engine — GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...

x402engine — Generate one 1024×1024 PNG with GPT Image 2.5 Flare at high quality

x402engine — Anthropic's latest balanced model — excellent coding, reasoning, and creative writing