// use case

Expose your Flask dev server to the OAuth provider for OAuth callback

1. 1

   Reserve a stable subdomain

   On the lrok free plan you keep one reserved subdomain forever. Pick a name your the OAuth provider dashboard can hold onto — webhook URLs that survive laptop restarts mean fewer dashboard re-pastes.

   $ lrok reserve fla-oauth
     Reserved https://fla-oauth.lrok.io

2. 2

   Run your Flask app

   Start the dev server on port 5000 (the Flask default).

   $ flask run

3. 3

   Tunnel localhost to the public URL

   lrok forwards https://fla-oauth.lrok.io/webhook → http://127.0.0.1:5000/webhook. The flag --hint binds your reserved subdomain to this tunnel.

   $ lrok http 5000 --hint fla-oauth
     Forwarding https://fla-oauth.lrok.io  ->  http://127.0.0.1:5000

4. 4

   Paste the URL into the OAuth provider

   OAuth app settings → Redirect URIs. Paste https://fla-oauth.lrok.io/webhook as the destination.

5. 5

   Watch deliveries land in the request inspector

   Every webhook the OAuth provider sends shows up at lrok.io/dashboard with full body, headers, status, and latency. Re-deliver any request to your Flask handler with one click. Make sure the redirect URI you register matches exactly — protocol, host, path, and trailing slash. Mismatches produce the cryptic "redirect_uri_mismatch" error.