Discourse is backed by a complete JSON api. Anything you can do on the site you can also do using the JSON api.
Many of the endpoints are properly documented in the discourse_api gem, however some endpoints lack documentation.
To determine how to do something with the JSON API here are some steps you can follow.
Example: recategorize a topic.
- Go to a topic and start editing a category:
- Open Chrome dev tools, switch to the Network tab, select XHR filter:
- Perform the operation
- Note that in some versions of Chrome, the “Form Data” will be located under the “Payload” tab

- Look at preview as well to figure out the results

- You now have all the info you need.
- 
The endpoint is http://try.discourse.org/t/online-learning/108.json
- 
Payload is passed using a PUT
- 
The parameter sent is: category_id: 5
Equipped with this information you can make your own calls using your favorite programming language. All you need to do is add your  Api-Username and Api-Key to the request headers. (See Discourse REST API Documentation for details about how to formulate a curl request to the Discourse API.)
API credentials can be generated from the Admin / API tab:
Last Reviewed by @SaraDev on 2022-06-03T00:00:00Z



