API marketplace

Generate .gitignore files as an API — 309 ready-to-use .gitignore templates for languages, frameworks, tools and editors, straight from GitHub's official github/gitignore collection. Fetch the .gitignore for any single technology (Node, Python, Java, Rust, Unity, …), search and list all available templates by name or category (languages, editors/OS globals, community stacks), or — the headline feature — combine several templates into one ready-to-commit .gitignore in a single call (e.g. names=Node,Python,macOS). Ideal for scaffolding tools, project generators, IDEs, CLIs and developer dashboards. Open data from github/gitignore (CC0).

Uptime

100.0%

Latency

76ms

Subs

3,136

Simplified, example-driven help for the command line as an API — the community tldr-pages project, 7,045 command-line tools across Linux, macOS, Windows and more. Instead of dense man pages, every command (tar, git, ffmpeg, curl, docker, ssh, awk, …) comes back as a short description plus a handful of practical, copy-paste example commands with placeholders. Look up a command, search commands by name or description, filter by platform, or fetch a random command. Ideal for terminals, IDEs, chatbots, developer tools, onboarding and learning. Open data from tldr-pages (CC-BY).

Uptime

100.0%

Latency

75ms

Subs

4,183

Wikipedia pageview statistics as an API, live from the official Wikimedia REST API. See the most-viewed Wikipedia articles for any day — a real-time pulse of what the world is reading and searching for — with junk namespaces filtered out by default, and get the daily (or monthly) view counts and totals for any individual article over any date range. Works for any language edition (en.wikipedia, de.wikipedia, fr.wikipedia and 300+ projects) and any access method (desktop, mobile-web, mobile-app). Ideal for trend analysis, news, research, dashboards, SEO and content strategy. Public Wikimedia data.

Uptime

100.0%

Latency

148ms

Subs

4,439

The Encyclopaedia of Chess Openings (ECO) as an API — 3,161 named chess openings and variations with their ECO code (A00–E99), full name, family/variation and the exact move sequence (PGN and a clean move list). Search openings by name, ECO code or ECO volume; list every opening under a code (e.g. B20 → 27 Sicilian lines); pick a random opening; and — the killer feature — identify which opening a game is in from a sequence of moves (e.g. "1. e4 c5 2. Nf3" → Sicilian Defense). Ideal for chess apps, game analysis, training tools, bots and trivia. Open data from the lichess-org/chess-openings project.

Uptime

100.0%

Latency

76ms

Subs

4,815

Castles around the world as an API — 17,000+ castles from Wikidata with their country, geographic coordinates and the year they were built. Search and filter castles by name, country and build-year range, or find every castle near any coordinate by great-circle distance (perfect for "castles near me" features). Spanning Germany, Italy, France, Spain, the UK and 100+ countries, it is ideal for travel, tourism, maps, history, education and trivia apps. Open data from Wikidata.

Uptime

100.0%

Latency

79ms

Subs

3,109

Stadiums and sports venues around the world as an API — 7,000+ stadiums from Wikidata with their seating capacity, country and city, geographic coordinates and year opened. Search and filter by name, country, minimum capacity and opening year (the results come back largest-first, so it doubles as a "biggest stadiums in the world" ranking), or find every stadium near any coordinate by great-circle distance. Ideal for sports, travel, ticketing, maps, trivia and matchday apps. Open data from Wikidata.

Uptime

100.0%

Latency

82ms

Subs

3,298

Every public bike-share and e-scooter system in the world as an API — 1,500+ systems across 48 countries from the MobilityData GBFS catalog, plus LIVE station availability. Browse and search the systems catalog by country or name (Citi Bike, Vélib', Divvy, Blue Bikes, Capital Bikeshare, …), look up a system with its GBFS feed URLs, and fetch real-time station data — each station's name, location, capacity and how many bikes and docks are free right now — or find the nearest stations to any coordinate by great-circle distance. Ideal for trip-planning, mobility, maps and smart-city apps. Catalog data from MobilityData; live availability from each operator's official GBFS feed.

Uptime

100.0%

Latency

77ms

Subs

3,539

The US Federal Register as an API — the official daily journal of the United States government, live from federalregister.gov. Search the full record of federal rules, proposed rules, public notices and presidential documents (including executive orders) by keyword, document type, issuing agency and publication-date range; fetch any document by its number with title, abstract, agencies, publication and signing dates, executive-order number and links to the official HTML and PDF; and list the 470+ federal agencies. Ideal for legal-tech, compliance, regulatory-monitoring, government-transparency, policy-research and news applications. Public-domain US government data.

Uptime

100.0%

Latency

251ms

Subs

4,452

Every member of the United States Congress as an API — all 12,766 legislators, current and historical, from 1789 to today. Look up any member by Bioguide or GovTrack id, or search and filter the full roster by name, US state, party and chamber (Senate / House), and list the current members of Congress. Each record carries the member's name, gender, birthday, party, state and district, chamber, the number of terms served and the complete term-by-term history with start and end dates, plus cross-reference ids (GovTrack, OpenSecrets, FEC, Wikipedia, Wikidata). Ideal for civic-tech, news, government-transparency, lobbying and political-research apps. Data from the public-domain @unitedstates project.

Uptime

100.0%

Latency

85ms

Subs

3,388

Chemical compound data as an API, powered by NIH PubChem (>100 million compounds). Look up any compound by common name, PubChem CID or SMILES and get its molecular formula, molecular and exact mass, IUPAC name, canonical SMILES, InChI and InChIKey, plus physicochemical properties (XLogP, TPSA, formal charge, hydrogen-bond donor/acceptor counts, rotatable bonds, heavy-atom count). List a compound's synonyms and trade/registry names, or resolve a name to PubChem CIDs. Ideal for cheminformatics, lab software, education, drug-discovery tooling and scientific data pipelines.

Uptime

100.0%

Latency

493ms

Subs

4,829

Every UNESCO World Heritage Site as an API — all 1,236 inscribed sites worldwide (cultural, natural and mixed) from the official UNESCO World Heritage List. Look up any site by its WHC id (e.g. Galápagos Islands, Machu Picchu, Historic Centre of Rome) with its country, exact coordinates, the year it was inscribed and the UNESCO selection criteria. Search and filter by name, country, category (cultural / natural / mixed) and inscription year, or find every World Heritage Site near any coordinate by great-circle distance. Ideal for travel, tourism, maps, education and cultural-discovery apps.

Uptime

100.0%

Latency

82ms

Subs

4,534

The full SPDX License List as an API — all 729 software licenses with metadata and the complete license text for each. Look up any license by its SPDX id (e.g. MIT, Apache-2.0, GPL-3.0-only, MPL-2.0) and get the exact, canonical license text plus its name, reference URL, see-also links and standard header. Search or list licenses by name/id and filter by OSI-approved (Open Source Initiative), FSF-libre (Free Software Foundation) or deprecated status. Ideal for SBOM / license-compliance tooling, package managers, repository scanners, legal review, and open-source governance dashboards.

Uptime

100.0%

Latency

81ms

Subs

3,122

Live natural events happening around the world as an API, from NASA EONET (Earth Observatory Natural Event Tracker). List currently active (or past) events — wildfires, severe storms and tropical cyclones, volcanoes, floods, landslides, droughts, sea/lake ice and more — each with its title, category, current location and date, the full track of geometry points over time, and source links; or find the events nearest any coordinate (great-circle distance). Filter by category or time window. Ideal for natural-hazard dashboards, situational awareness, travel-safety, insurance and environmental monitoring.

Uptime

100.0%

Latency

598ms

Subs

4,503

Airport radio communication frequencies as an API — 30,000+ frequencies at 11,000+ airports, from the OurAirports dataset. List every published frequency at an airport by ident (e.g. KJFK → Approach 125.7/127.4/132.4, ATIS, Tower, Ground, Clearance, …), or filter fleet-wide by type or exact frequency (e.g. find every airport using the emergency frequency 121.5). Each record carries the airport, frequency type (TWR, GND, ATIS, APP, CTAF, UNICOM, CNTR, …) with a readable name, the description and the frequency in MHz. Ideal for aviation radio, flight simulators, EFB, scanner and flight-planning apps.

Uptime

100.0%

Latency

87ms

Subs

4,578

Every runway in the world as an API — 47,000+ runways at 40,000+ airports, from the OurAirports dataset. List all the runways at any airport by ICAO/local ident (e.g. KJFK → four runways, the longest 13R/31L at 14,511 ft), with each runway's length (feet and metres), width, surface (asphalt, concrete, grass, …), lighting and both-end designators, true headings and coordinates. Or filter runways fleet-wide by surface, minimum length and lighting. Ideal for flight planning, flight simulators, EFB and aeronautical apps, and aviation analytics.

Uptime

100.0%

Latency

85ms

Subs

3,827

Radio navigation aids (navaids) as an API — 11,000+ VOR, NDB, DME, TACAN, VORTAC and VOR-DME beacons across 231 countries, from the OurAirports dataset. Look up a navaid by its ident (e.g. JFK → Kennedy VOR-DME 115.9 MHz), search by name/ident with country and type filters, or find all navaids within a radius of any coordinate. Each record carries the ident, name, type, frequency (kHz and MHz), elevation, country and any associated airport. Ideal for aviation tools, flight simulators, EFB apps, flight planning and aeronautical charts.

Uptime

100.0%

Latency

77ms

Subs

4,919

The WHO ATC (Anatomical Therapeutic Chemical) drug classification as an API — 6,400+ codes organising every medicine into a 5-level hierarchy: anatomical main group → therapeutic subgroup → pharmacological subgroup → chemical subgroup → chemical substance. Look up any ATC code (e.g. A10BA02 → metformin, N02BE01 → paracetamol, J01CA04 → amoxicillin) with its full ancestor chain, direct children and WHO Defined Daily Doses (DDD); search drugs by name; or navigate the tree from the 14 anatomical main groups. Ideal for e-prescribing, pharmacy, clinical decision support, drug databases and health analytics.

Uptime

100.0%

Latency

76ms

Subs

4,153

Live near-Earth object close approaches as an API, straight from NASA/JPL's Close-Approach Data (CAD) system. List the asteroids and comets passing nearest Earth over the next N days (or look back), with the approach date, miss distance (in astronomical units, lunar distances and kilometres), relative velocity and an estimated diameter from the object's absolute magnitude; or pull the full close-approach history for a specific object (e.g. 99942 Apophis, 101955 Bennu). Ideal for planetary-defense dashboards, astronomy & space apps, education and "asteroid of the week" content.

Uptime

100.0%

Latency

356ms

Subs

3,776

Historical events, notable births and deaths, and holidays for any calendar date — "on this day in history" — relayed live from Wikipedia. Get today's curated highlights, or pass any date (e.g. 07-20 → Apollo 11 Moon landing among the events) to retrieve notable events, births, deaths, holidays/observances, or the editor-selected highlights. Every entry carries the year, a one-line description and a link to the relevant Wikipedia article. Ideal for "today in history" widgets, daily-content apps, trivia, newsletters and educational tools.

Uptime

100.0%

Latency

1297ms

Subs

3,907

Live river and stream conditions from the USGS Water Services network. The catalogue of 16,900+ active US streamflow gauges is searchable by name, state or coordinate; the live endpoint returns the latest observation for any gauge: streamflow / discharge (in cubic feet per second and m³/s) and gauge height (in feet and metres), with the station name, observation time and coordinates. Find the gauges nearest any lat/lon. Ideal for flood monitoring, hydrology, whitewater/fishing & recreation apps, drought tracking and environmental dashboards.

Uptime

100.0%

Latency

363ms

Subs

3,937

The UN/LOCODE registry (United Nations Code for Trade and Transport Locations) as an API — 116,000+ ports, airports, rail and road terminals and trade points across 249 countries. Resolve any 5-character code (e.g. USNYC → New York; DEHAM → Hamburg; NLRTM → Rotterdam) to its name, country, subdivision, transport functions (port, rail, road, airport, postal, …), IATA code and coordinates; search locations by name with country and function filters; or list every location in a country. UN/LOCODE is the standard used in shipping, logistics, customs and EDI. Ideal for supply-chain, freight, trade-compliance and logistics software.

Uptime

100.0%

Latency

85ms

Subs

4,322

Live marine weather and ocean conditions from NOAA's National Data Buoy Center (NDBC). The station catalogue (1,930 moored buoys and coastal stations worldwide) is searchable by name, type or coordinate; the live endpoint returns the latest observation for any station: significant wave height, wave period and direction, water and air temperature, wind speed/gust/direction, atmospheric pressure and more. Find the nearest buoys to any lat/lon. Ideal for surfing & sailing apps, marine operations, coastal monitoring and oceanography.

Uptime

100.0%

Latency

162ms

Subs

3,708

A corpus of 2,500+ classic public-domain poems by 127 authors (Shakespeare, Keats, Dickinson, Whitman, Poe, Frost and many more), via the PoetryDB collection. Look up a poem by title or id and get its full text, line by line; browse every poem by an author (or list all authors); full-text search across titles, authors and lines; or fetch a random poem (optionally by author or capped to a number of lines, perfect for a poem-of-the-day). Ideal for literary apps, education, writing tools, daily-poem widgets and creative projects.

Uptime

100.0%

Latency

76ms

Subs

3,277

Live solar and geomagnetic conditions as an API, relayed from NOAA's Space Weather Prediction Center (SWPC). Get the current planetary K-index with its activity level and geomagnetic-storm scale (Kp 5+ → G1-G5); the real-time solar wind from the L1 point (speed, density, temperature, magnetic field Bz/Bt); the current NOAA scales for radio blackouts (R), solar-radiation storms (S) and geomagnetic storms (G); and the latest space-weather alerts, watches and warnings. Ideal for aurora forecasting, satellite & power-grid operations, HF-radio and amateur-radio apps, and science dashboards.

Uptime

100.0%

Latency

96ms

Subs

4,230