Reverse engineer the Discourse API says Anything you can do on the site you can also do using the JSON api. Alas, https://docs.discourse.org/ Some endpoints do not require any authentication, pretty much anything else will require you to be authenticated. To become authenticated you will need…

Allow API use by regular users, not just admins

Topic		Replies	Views
User API keys specification Integrations rest-api , reference	66	33553	May 7, 2025
Discourse Login & Registeration Dev	4	3293	September 28, 2016
Create apikey for user programmatically as admin Dev rest-api	8	1841	February 26, 2024
Generating User Api Keys with REST API Dev rest-api	20	8508	April 8, 2018
Can non-admin user issue their own API key? Dev rest-api	13	2556	September 2, 2021