Federal Aviation Administration

FAA NOTAM API

Notices to Air Missions retrieval API. Probe-confirmed live but gated — an unauthenticated GET returned HTTP 401 with the body {"message":"Unauthorized", "http_status_code":401} on 2026-07-28, while the bare external-api.faa.gov host returns 404, so the route exists behind credentials. Access is via a client_id and client_secret issued from the api.faa.gov developer portal. No public OpenAPI was published for this API in the portal's public catalog, so none was harvested — and the API does not appear in that catalog at all, so it has no published plan. Re-verified 401 on 2026-07-28. This surface sits on the legacy side of the FAA's NOTAM modernization; see the NOTAM Management Service (NMS) entry.

GitHub

Documentation

📖
Documentation
https://api.faa.gov/

Other Resources

🔗
Website
https://notams.aim.faa.gov/notamSearch/
🔗
Deprecation
https://nms.aim.faa.gov/

API entry from apis.yml

apis.yml Raw ↑ 
aid: faa:faa-notam-api
name: FAA NOTAM API
description: Notices to Air Missions retrieval API. Probe-confirmed live but gated — an unauthenticated
  GET returned HTTP 401 with the body {"message":"Unauthorized", "http_status_code":401} on 2026-07-28,
  while the bare external-api.faa.gov host returns 404, so the route exists behind credentials. Access
  is via a client_id and client_secret issued from the api.faa.gov developer portal. No public OpenAPI
  was published for this API in the portal's public catalog, so none was harvested — and the API does
  not appear in that catalog at all, so it has no published plan. Re-verified 401 on 2026-07-28. This
  surface sits on the legacy side of the FAA's NOTAM modernization; see the NOTAM Management Service (NMS)
  entry.
humanURL: https://api.faa.gov/
baseURL: https://external-api.faa.gov/notamapi/v1
tags:
- NOTAM
- Flight Information
- Airspace
- Aviation
properties:
- type: Documentation
  url: https://api.faa.gov/
- type: Website
  url: https://notams.aim.faa.gov/notamSearch/
- type: Deprecation
  name: NOTAM modernization — USNS and FNS retiring in favour of NMS
  url: https://nms.aim.faa.gov/