#atc

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.

api.oanor.com/airportfreq-api

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.

api.oanor.com/atc-api