SIGINT APIs

Telemetry and aggregator APIs the SIGINT operator pulls from. Real-time radio capture stays local; APIs cover beacon, transponder, and metadata streams.

API	Auth + tier	Endpoint	Returns
OpenSky Network	Free with attribution; commercial tier for higher rates.	https://opensky-network.org/api/	ADS-B aircraft state vectors and flight history.
ADS-B Exchange	Free for non-commercial.	https://www.adsbexchange.com/data/	Unfiltered ADS-B aircraft tracking.
FlightAware AeroAPI	Paid; commercial.	https://aeroapi.flightaware.com/aeroapi/	Commercial flight tracking with rich metadata.
MarineTraffic API	Paid; tiered.	https://services.marinetraffic.com/api/	AIS vessel positions and metadata.
AISHub	Free with reciprocal feed.	http://www.aishub.net/	Crowdsourced AIS data.
PSKReporter	No auth.	https://www.pskreporter.info/cgi-bin/pskquery5.pl	Amateur-radio digital-mode spots, useful for HF propagation.
WSPRnet	No auth.	https://wsprnet.org/drupal/wsprnet/spotquery	Weak-signal beacon reports, propagation analysis.
KiwiSDR network	Public receivers; rate-limited per receiver.	http://kiwisdr.com/public/	Public web-SDR receivers worldwide; remote spectrum capture.
RTLSDR.com tuner index	Public.	https://www.rtl-sdr.com/	Directory of public WebSDRs.
Satnogs DB + Network	Public; submission requires account.	https://db.satnogs.org/api/	Satellite catalog and decoded telemetry.
Space-Track	Free account; ITAR-restricted in some jurisdictions.	https://www.space-track.org/	TLE and conjunction data for tracked space objects.
Heavens-Above	Public.	https://www.heavens-above.com/	Satellite pass prediction.

References

• SIGINT for the discipline overview.

• SIGINT Tools for the operator’s kit.

• SIGINT Sources for the data sources.

• SIGINT Techniques for the tradecraft.

• SIGINT Intel for the finished-product side.

• 0X43 - Wireless

• 0X45 - Electronic

• OpenSky Network