An API (Application Programming Interface) allows you to send and receive data from a remote server, like querying a database. This is helpful when you're building an app or pulling metrics for reporting, because it means you can focus on presenting information in a unique or useful manner, rather than developing the underlying data set. For example, most weather apps get their weather forecast data from a weather API, rather than building weather stations themselves. For more detailed information on how APIs work, see here.
While most APIs require access via API keys (which are similar to passwords), or have complex methods of authentication, there are also quite a few APIs with no requirements at all. This is especially useful for beginners, as it means you can start exploring different APIs right away. It is also useful for web developers looking to access a sample data set for testing.
Big List of Free Open APIs
The APIs below can be accessed using any method:
- your web browser (just click on the sample URLs to load them)
- any modern coding language
- cURL for the command line
- no-code API clients like Swagger, Postman, or Insomnia
- Mixed Analytics' own API Connector for Google Sheets