API marketplace

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 IANA "Assigned Internet Protocol Numbers" registry as an API — the 8-bit value carried in the IPv4 Protocol field (and IPv6 Next Header) that identifies the encapsulated protocol. Resolve any number to its protocol (e.g. 6 → TCP, 17 → UDP, 1 → ICMP, 47 → GRE, 50 → ESP, 58 → IPv6-ICMP, 89 → OSPF, 132 → SCTP), look up by keyword, search by name, or list all 151 assigned protocols — each with its keyword, full name, IPv6-extension-header flag and defining RFC. Ideal for packet/firewall tooling, network analysis, NetFlow/IPFIX decoders and protocol documentation. (Distinct from transport-layer service port numbers.)

Uptime

100.0%

Latency

79ms

Subs

4,014

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

Look up Autonomous System Numbers (ASNs) — the identifiers that label every network on the public internet — mapped to their owning organisation and country. 122,000+ ASNs derived from the Regional Internet Registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC). Resolve an ASN to its operator (e.g. AS15169 → Google LLC, US; AS13335 → Cloudflare; AS16509 → Amazon), or search by organisation name and country (e.g. "hetzner" in DE). Ideal for network intelligence, abuse/security investigation, traffic analysis, IP-reputation tooling and BGP/peering research.

Uptime

100.0%

Latency

91ms

Subs

3,817

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

Live aviation weather for any airport as an API, relayed from NOAA's Aviation Weather Center. Get the current METAR observation for an ICAO station (e.g. KJFK → New York JFK: temperature, dewpoint, wind, visibility, altimeter, cloud layers, flight category VFR/MVFR/IFR/LIFR and the raw report) or the TAF terminal aerodrome forecast. Query one station or up to 10 at once (KJFK,EGLL,EDDF). Both decoded fields and the raw text are returned. Ideal for flight-planning tools, aviation dashboards, drone/UAV operations and weather apps.

Uptime

100.0%

Latency

369ms

Subs

4,411

The IANA Uniform Resource Identifier (URI) Schemes registry as an API — all 413 registered schemes (http, https, mailto, tel, ftp, ssh, magnet, bitcoin, geo, did, …). Look up any scheme to get its description, registration status (Permanent, Provisional or Historical) and defining reference; search by name or description; or list all schemes filtered by status. Ideal for URL parsers and validators, link handlers, deep-linking, security allow-lists and developer tooling that needs to recognise or vet URI schemes.

Uptime

100.0%

Latency

77ms

Subs

3,221

A clean, programmatic reference for HTTP semantics, built on the official IANA registries. Look up any status code with its reason phrase and class (404 → Not Found, Client Error; 503 → Service Unavailable, Server Error), list a whole class (4xx, 5xx…); look up any method with its safe/idempotent flags (GET → safe + idempotent, POST → neither, DELETE → idempotent); or look up / search the 255 registered HTTP header fields (Content-Type, Authorization, …) with their registration status. Ideal for API tooling, HTTP clients, documentation, linters, learning resources and error pages.

Uptime

100.0%

Latency

77ms

Subs

4,835

The OpenNGC (NGC/IC) catalogue of deep-sky objects as an API — 13,000+ galaxies, nebulae and star clusters. Look up any object by its catalogue name (NGC224, IC434), Messier number (M31 → Andromeda Galaxy, M42 → Orion Nebula, M1 → Crab Nebula) or common name; browse the full 110-object Messier catalogue; or search by type (galaxy, planetary nebula, globular cluster…) and constellation. Each record carries the object type, J2000 coordinates (sexagesimal + decimal), V/B magnitude, angular size, surface brightness, Hubble morphological type, constellation and cross-catalogue identifiers. Ideal for astronomy apps, telescope planners, planetarium software and education.

Uptime

100.0%

Latency

78ms

Subs

3,336

US given-name popularity from 1880 to 2008 as an API — the top 1,000 names per year for each sex (SSA-derived dataset, 6,782 names). Pull a name's full popularity trend (e.g. Emma → girls: rank #1 in 2008, peaked again in 1881), get the top names for any year (e.g. 1990 → Jessica, Ashley, Brittany), or search names by prefix/substring. Each data point carries the year, the share of births (percent and per-million) and the rank. Ideal for name-trend visualisations, baby-name apps, nostalgia/genealogy tools and data journalism.

Uptime

100.0%

Latency

81ms

Subs

3,731

ISO 18245 Merchant Category Codes (MCC) as an API — the 981 four-digit codes that Visa, Mastercard and other card networks use to classify a merchant's line of business. Look up any code (e.g. 5812 → Eating places and Restaurants, 5411 → Grocery Stores/Supermarkets, 3000 → United Airlines), search by description (e.g. "hotel", "airline", "pharmacy"), filter by IRS-reportable status, or list them all. Each record carries the network/edited description, USDA and IRS descriptions and whether the category is IRS 1099-reportable. Ideal for payments, fintech, expense management, fraud analysis and transaction enrichment.

Uptime

100.0%

Latency

78ms

Subs

3,078

Formula 1 reference data as an API, built on the Ergast / Jolpica F1 dataset — every driver, constructor and circuit in F1 history plus every season since 1950. Look up a driver by id or name (e.g. hamilton → Lewis Hamilton, code HAM, #44, British), a constructor/team (ferrari → Ferrari), or a circuit with its coordinates and country (monza → Autodromo Nazionale di Monza, Italy); or search across all three (e.g. "verstappen" → Jos & Max Verstappen). 879 drivers, 214 constructors, 78 circuits. Ideal for motorsport apps, fantasy F1, sports trivia and data dashboards.

Uptime

100.0%

Latency

71ms

Subs

3,750

The NIST CODATA 2022 fundamental physical constants as an API — 355 quantities used throughout physics and engineering. Look up any constant by name or slug (e.g. speed of light in vacuum → 299792458 m/s, exact; Planck constant, elementary charge, Avogadro constant, Boltzmann constant, Newtonian constant of gravitation), search by keyword, or list them all. Each record carries the recommended value, the standard uncertainty, the SI unit and whether the value is exact (by definition since the 2019 SI redefinition). Ideal for scientific calculators, physics/engineering software, education and lab tooling.

Uptime

100.0%

Latency

83ms

Subs

4,727

IETF BCP 47 language tags (locales) as an API, built on the IANA Language Subtag Registry — 9,200+ subtags (languages, scripts, regions, variants, extlangs and grandfathered tags). The headline /parse endpoint validates and decomposes any language tag (e.g. zh-Hant-TW → Chinese + Han Traditional script + Taiwan; en-Latn-US, de-CH-1996, i-klingon) into its labelled subtags, flags invalid or deprecated parts, and recognises pre-registered redundant/grandfathered tags. Look up an individual subtag (de → German, Hant → Han Traditional, 419 → Latin America), or search the registry by description. Ideal for internationalization (i18n), locale validation, content negotiation and language-aware apps.

Uptime

100.0%

Latency

77ms

Subs

3,779

The NASA/JPL Small-Body Database (SBDB) as an API — 30,000+ named asteroids and comets with their physical and orbital properties. Look up any minor body by number (e.g. 1 → Ceres), name (Vesta) or SPK-ID; search by name with filters for orbit class, near-Earth (NEO) and potentially-hazardous (PHA) status; or list every near-Earth object. Each record carries the diameter, albedo, absolute magnitude, rotation period and the osculating orbit (semi-major axis, eccentricity, inclination, period) plus the orbit class (main-belt, Apollo, Trojan, …). Ideal for astronomy apps, planetarium software, education and space dashboards.

Uptime

100.0%

Latency

85ms

Subs

3,769

The North American Industry Classification System (NAICS 2022) as an API — 2,100+ industry codes in a 5-level hierarchy (sector → subsector → industry group → industry → national industry). Look up any code (e.g. 541511 → Custom Computer Programming Services) with its full ancestor chain and direct children; search industries by title (e.g. "software", "restaurant"); or navigate the tree from the 20 top-level sectors down. NAICS is the standard used by US, Canadian and Mexican statistical agencies to classify business establishments. Ideal for business classification, market research, CRM enrichment, lead segmentation and economic analysis.

Uptime

100.0%

Latency

77ms

Subs

4,889