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  4. OpenSky Network API
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OpenSky Network API

The OpenSky Network API provides developers free access to real-time and historical flight tracking data, suitable for aviation monitoring and research applications.

Developed by OpenSky Network

Live API
99.80%Uptime
300msLatency
320Stars
No AuthAuth
NoCredit Card
RESTStyle
1.0Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Get real-time states of all aircraft

Endpoint URL
https://opensky-network.org/api/states/all
Code Example
curl -X GET 'https://opensky-network.org/api/states/all'
Expected Response
{
  "time": 1620000000,
  "states": [
    [
      "a1b2c3",
      "UAL100",
      "United States"
    ]
  ]
}
Version:v1
Limit:Unlimited

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://opensky-network.org/api/api/states/all"

Docs

Technical Documentation

What this API does

The OpenSky Network API delivers real-time and historical flight tracking data sourced from a vast community-powered network of ADS-B and Mode S receivers worldwide. It empowers developers to access live aircraft positions, velocity, callsigns, and squawk codes, as well as detailed flight tracks, enabling robust aviation monitoring and analysis applications.

How it works

Developers can send HTTP GET requests to retrieve live aircraft positions and historical flight data. The API supports data retrieval in JSON format, making it compatible with various programming languages, including Python. Integrating the API allows for seamless flight visualization and air traffic monitoring.

Authentication

Authentication is required for accessing extended features. Developers can access up to 400 credits per day anonymously or obtain 4,000 credits per day with registration.

Example usage

  • /api/states/all - Retrieves the current states of all aircraft tracked in real-time.
  • /api/flights/aircraft/{icao24} - Provides historical flight data for a specific aircraft based on its ICAO24 address.
  • /api/flights/query - Allows for detailed queries on flight data based on various parameters.

Limits

Free users can make up to 400 requests per day, while registered users have a limit of 4,000 requests per day.

Ideal use cases

  • Building flight tracking applications for mobile and web.
  • Conducting aviation research using historical flight data.
  • Enhancing air traffic monitoring solutions with real-time data.
  • Developing tools for aviation enthusiasts and professionals.

Examples

Real-World Applications

  • Live monitoring of air traffic for aviation safety and situational awareness
  • Data analytics of aviation trends and aircraft performance
  • Developing flight tracking and visualization apps for commercial or personal use
  • Academic research leveraging historical flight data for pattern analysis
  • Educational tools demonstrating flight paths and air traffic management

Evaluation

Advantages & Limitations

Advantages
  • ✓ Free access with generous daily request limits
  • ✓ No mandatory authentication needed for anonymous usage
  • ✓ Wide global coverage through community-powered receiver network
  • ✓ JSON responses compatible with multiple programming languages
  • ✓ Includes both real-time and comprehensive historical flight data
Limitations
  • ✗ Limited advanced filtering or query capabilities compared to commercial APIs
  • ✗ No official paid tier with SLA or guaranteed support
  • ✗ Latency can be higher during peak loads due to open access
  • ✗ Lack of OAuth or API keys may limit advanced security features
  • ✗ Coverage depends on community receivers, which may cause data gaps

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Apr 30, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

1.0
Pricing Model
Free access with optional registration for higher limits
Credit Card
Not Required
Response Formats
JSON
Supported Languages
5 Languages
SDK Support
Python
Rate Limit

400 requests/day anonymous, 4000 requests/day registered users

Time to Hello World

Less than 10 minutes

Free Tier

Anonymous users get 400 API requests per day; registered users receive 4000 requests per day with access to additional data features.

Best For

Aviation developers, researchers, hobbyists needing free real-time and historical flight data

Not Ideal For

Enterprise applications requiring SLA-backed commercial support or high throughput

Tags

#research#transportation#aircraft#flight-tracking#opensky#real-time#free-api#aviation

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