OpenSky Network Getting Started: API Access & First Request (2026)

Getting started overview

Integrating with the OpenSky Network API involves a sequence of steps, beginning with account creation and proceeding through authentication to making your initial data request. The OpenSky Network provides access to real-time and historical flight data, primarily sourced from ADS-B receivers globally (OpenSky Network REST API introduction). The API supports various endpoints for retrieving current states of aircraft, flights within a specific time range, or flights by aircraft registration.

The authentication mechanism for the OpenSky Network API utilizes Basic Authentication. This standard HTTP authentication scheme involves sending a username and password with each request. For non-commercial and research-oriented applications, access is typically granted free of charge upon application and approval. Commercial use cases are subject to tiered pricing structures, which vary based on factors such as data volume, query complexity, and update frequency (OpenSky Network data access options).

Before making your first API call, it is necessary to register an account, which provides the credentials required for authentication. This process ensures that usage can be monitored and managed according to the terms of service, differentiating between academic/research and commercial applications. Once registered and approved, developers can use these credentials to access the various API endpoints to retrieve flight data.

The following table summarizes the initial steps to begin using the OpenSky Network API:

Create an account and get keys

To begin using the OpenSky Network API, the first step is to create an account. The process differs slightly depending on whether you intend to use the API for academic/research purposes or for commercial applications.

1. Navigate to the Data Access Page: Visit the OpenSky Network data access page.
2. Choose Your Access Type:
   • Academic/Research Access: Look for the option to apply for free access for non-commercial or academic use. This typically involves filling out a form detailing your research project or non-commercial intent. Approval for academic access may take some time as applications are reviewed manually (OpenSky Network academic access details). Once approved, your credentials (username and password) will be provided, often via email.
   • Commercial Access: For commercial use, you will be directed to options for paid plans. These plans vary in terms of data volume, update frequency, and access to advanced features. Select a plan that aligns with your project requirements. After selecting a plan and completing the subscription process, your API credentials (username and password) will be made available, typically through an account dashboard or directly via email.
3. Receive Credentials: Upon approval for academic access or subscription to a commercial plan, you will receive your API username and password. These credentials are essential for authenticating your requests to the OpenSky Network API.

It is important to store your API credentials securely and avoid exposing them in client-side code or public repositories. The OpenSky Network uses Basic Authentication, which requires sending these credentials with every API request.

Your first request

Once you have obtained your API username and password, you can make your first request to the OpenSky Network API. This example demonstrates how to retrieve the current states of all aircraft known to the network using the /states/all endpoint. This endpoint provides real-time data on aircraft position, velocity, heading, and other parameters.

The OpenSky Network API primarily uses HTTP GET requests and returns data in JSON format (OpenSky Network API JSON output). Authentication is handled via HTTP Basic Authentication.

Constructing the Basic Authentication Header

Basic Authentication requires creating a Base64-encoded string of your username and password, formatted as username:password. This encoded string is then included in the Authorization header of your HTTP request.

Example (replace YOUR_USERNAME and YOUR_PASSWORD with your actual credentials):

echo -n 'YOUR_USERNAME:YOUR_PASSWORD' | base64

The output will be a string like WV9VU0VSTkFNRTpZT1VSX1BBU1NXT1JE. This string, prefixed with Basic , forms your Authorization header value.

Example Request using curl

Using curl, a common command-line tool for making HTTP requests, you can make a request to the /states/all endpoint:

curl -u 'YOUR_USERNAME:YOUR_PASSWORD' 'https://opensky-network.org/api/states/all'

Alternatively, explicitly setting the Authorization header:

curl -H 'Authorization: Basic WV9VU0VSTkFNRTpZT1VSX1BBU1NXT1JE' 'https://opensky-network.org/api/states/all'

Replace YOUR_USERNAME, YOUR_PASSWORD, and the Base64 encoded string with your actual credentials. A successful response will return a JSON object containing an array of aircraft states.

Example Request in Python

For programmatic access, Python with the requests library is a common choice:

import requests

USERNAME = 'YOUR_USERNAME'
PASSWORD = 'YOUR_PASSWORD'

url = 'https://opensky-network.org/api/states/all'

try:
    response = requests.get(url, auth=(USERNAME, PASSWORD))
    response.raise_for_status()  # Raise an HTTPError for bad responses (4xx or 5xx)
    data = response.json()
    print("Successfully fetched data:")
    # Print first few states for brevity
    if data and 'states' in data and data['states']:
        for i, state in enumerate(data['states'][:5]): # Print first 5 states
            print(f"State {i+1}: {state}")
    else:
        print("No states data received.")
except requests.exceptions.RequestException as e:
    print(f"An error occurred: {e}")
except ValueError:
    print(f"Failed to decode JSON from response: {response.text}")

This Python script makes an authenticated GET request and prints a portion of the JSON response. The auth=(USERNAME, PASSWORD) parameter automatically handles the Basic Authentication header creation.

Common next steps

After successfully making your first request, several common next steps can enhance your interaction with the OpenSky Network API:

1. Explore Other Endpoints: The /states/all endpoint provides a broad overview. Investigate other endpoints such as /flights/all for historical flight data, /flights/aircraft to query specific aircraft, or /flights/departure and /flights/arrival for flights originating from or arriving at specific airports (OpenSky Network API endpoints). Each endpoint has specific parameters for filtering and retrieving relevant data.
2. Implement Error Handling: Production applications should implement robust error handling. The API returns standard HTTP status codes (e.g., 401 for unauthorized, 403 for forbidden, 429 for too many requests, 500 for internal server errors). Your application should gracefully handle these responses and potentially implement retry mechanisms for transient errors.
3. Manage Rate Limits: The OpenSky Network API imposes rate limits to ensure fair usage and system stability. These limits vary based on your access type (academic vs. commercial) and specific plan. Consult the API documentation for details on current rate limits (OpenSky Network rate limiting policy). Implement mechanisms such as exponential backoff for retrying requests to avoid hitting rate limits.
4. Data Parsing and Storage: The API returns extensive JSON data. Develop efficient methods for parsing this data and storing it in a suitable database or data structure for analysis or display. Consider the volume of data you expect to process and choose an appropriate storage solution.
5. Security Best Practices: Beyond securing your API credentials, consider other security implications, especially if your application will expose OpenSky Network data publicly. Implement input validation and sanitize data to prevent common web vulnerabilities. Consult general API security best practices from sources like the OAuth 2.0 specification for robust authorization patterns, even though OpenSky Network uses basic auth for its primary API.
6. Utilize Impala Shell Access (for advanced users): For users with approved Impala shell access (typically for large-scale data processing or specific research projects), explore direct querying of the underlying database. This provides more flexibility for complex aggregations and custom data extraction beyond the REST API's capabilities (OpenSky Network Impala access details).

Troubleshooting the first call

When making your first API call to the OpenSky Network, you might encounter issues. Here are common problems and their solutions:

1. 401 Unauthorized Error:

   • Issue: This indicates that your authentication credentials (username and password) are incorrect or missing.
   • Solution: Double-check your username and password. Ensure they are correctly Base64 encoded if you are manually constructing the Authorization header. Verify that there are no leading or trailing spaces. If using the -u flag with curl or the auth parameter in requests, ensure the username and password are exactly as provided by OpenSky Network.
   • Verification: Confirm your credentials by attempting to log into the OpenSky Network website if an account portal is available, or by reviewing the email where your credentials were sent.

2. 403 Forbidden Error:

   • Issue: This usually means your account lacks the necessary permissions to access the requested resource, or your access has not yet been approved.
   • Solution: If you applied for academic/research access, ensure your application has been approved. If you have a commercial plan, verify that your subscription is active and covers the data you are trying to access. Some endpoints or query parameters might be restricted to higher-tier commercial plans.
   • Verification: Contact OpenSky Network support if you believe your access should be granted or if you need to upgrade your subscription.

3. 429 Too Many Requests Error:

   • Issue: You have exceeded the API's rate limits.
   • Solution: Reduce the frequency of your API requests. Implement a delay between calls or use an exponential backoff strategy for retries. Review the OpenSky Network API documentation for specific rate limit details applicable to your account tier (OpenSky Network API rate limits).
   • Verification: Wait for the specified retry-after period (often indicated in the response headers) before attempting further requests.

4. Network Connection Issues (e.g., DNS resolution failure, connection timeout):

   • Issue: Your client cannot reach the OpenSky Network API server.
   • Solution: Check your internet connection. Ensure the API endpoint URL (https://opensky-network.org/api/...) is correctly typed. Temporarily disable any VPNs or firewalls that might be blocking outbound connections.
   • Verification: Try pinging opensky-network.org from your terminal to verify basic network connectivity.

5. JSON Parsing Errors:

   • Issue: The API returned data that your client could not parse as valid JSON.
   • Solution: This can sometimes happen with unexpected error messages or if the server returns non-JSON content. Inspect the raw response text to understand what was actually returned. Ensure your HTTP client is correctly configured to expect and parse JSON.
   • Verification: Print the raw response.text (in Python) or examine the full curl output to see the exact content received.