CiberkitOAuth and PKCE
FreePKCE, authorization URL, code exchange with curl and response checks.
1 · Your application
3 · Authorization URL
4 · Check the response
Paste the URL the provider redirected you to (with ?code=… or ?error=…).
5 · Exchange the code for tokens
Run it in your terminal within the next few minutes: the code expires quickly and works only once.