Hi all,

I'm building a React Native app using Expo (in a development build on Android), and I'm integrating Strava OAuth. I'm using a custom URI scheme for redirection, generated like this:

const redirectUri = AuthSession.makeRedirectUri({ scheme: 'runquest', path: 'strava-redirect', });

This results in a URI like:

runquest://strava-redirect

I'm primarily using the mobile authorization endpoint:

https://www.strava.com/oauth/mobile/authorize

But I’ve also tried the standard web endpoint:

https://www.strava.com/oauth/authorize

In both cases, when the user clicks "Authorize", I receive an "invalid redirect_uri" error from Strava.

What I’ve tried:

• Setting "runquest" as the Authorized Callback Domain in the Strava Developer Dashboard

• Setting "localhost" as the Authorized Callback Domain in the Strava Developer Dashboard

• Trying variations like runquest://, runquest://strava-redirect, and runquest

• Testing with both OAuth endpoints

My questions:

1. What should I enter in the Authorized Callback Domain field if I'm using a custom URI scheme like runquest://strava-redirect?

2. Does Strava support custom URI schemes for mobile redirects, or only HTTPS URLs?

3. Is this issue expected in Expo development builds, particularly on Android?

Any clarification or examples of working Expo + Strava OAuth setups using custom schemes would be a huge help.

Thanks in advance!