OpenML offers a range of APIs to download and upload OpenML datasets, tasks, run algorithms on them, and share the results.

Easy authentication

In the interest of open science, we allow you to freely download all public resources, also through the APIs (rate limits apply when necessary). Uploading and sharing new datasets, tasks, flows and runs (or accessing any shared/private resources) is also very easy, and requires only the API key that you can find in your profile (after logging in).

If you use any of the language-specific APIs, you only need to store this key in a config file and forget about it.

For authenticating to the REST API, you can send your api key using Basic Auth, or by adding ?api_key='your key' to your calls. If you are logged into, this will be done automatically.