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hhjj49's avatar
hhjj49
New member | Level 2
3 years ago

Malformed OAuth2 Access Token When Deployed to Vercel

So I just started using dropbox for a nextjs/react app and everything works fine exactly as it should when I run it locally, but when I deploy to vercel I get a 400 code and the 'Error in call to API...
API
Greg-DB's avatar
Greg-DB
Icon for Dropbox Community Moderator rankDropbox Community Moderator
3 years ago

Regardless of where/how you're performing the API call, the "The given OAuth 2 access token is malformed" error should indicate that the call failed because the access token provided in the "Authorization" header was not of the expected form. This isn't something you need to or can configure for the app on the App Console.

 

I suggest inspecting the actual request your deployed app is sending to the /2/files/upload endpoint to see what it is including in the "Authorization" header. I can't offer help with Vercel itself as that's not made by Dropbox, so you may need to refer to its documentation to see how you can inspect/debug it.

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