# Introduction At aviowiki we believe that certain public institutions should provide openly accessible aviation data free of charge. They are not doing it. This is our way to give back to the Industry. Our Open Data contains basic but necessary information about all airports in our database. It is the most complete professional aviation database that you can find on the internet. ### Open Data is free You don't need to pay anything to access our Open Data. ### Open Data is easy You can retrieve our Open Data via the API using a [free API token](https://app.aviowiki.com/user/tokens), or by making unauthenticated API calls. Check all details in the [Free Endpoints](/free-endpoints/limitations.md) section of this documentation. We also offer a convenient download of the full Open Data set. This is updated every 24 hours and it is a mere 8MB. You can download this set from Or in a command line, type: ```bash curl -O https://exports.aviowiki.com/free_airports.json.zip ``` ### How can I use it Open Data is licensed under the Creative Common License with Attribution 4.0 International (CC BY 4.0). Full terms of the license can be accessed at --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.aviowiki.com/open-data/introduction.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.