I’m working on integrating Miro’s OAuth flow into my application and running into a frustrating issue. I’ve successfully completed the first two steps of the OAuth process - registering my app and getting users to authorize it. However, when I try to exchange the authorization code for an access token, I keep getting a 401 unauthorized error.
I’ve double-checked my client ID and client secret multiple times, and I’m certain they’re correct. The authorization code I’m using is fresh and hasn’t been used before. I’m making a POST request to the token endpoint with all the required parameters including the code, client_id, client_secret, redirect_uri, and grant_type.
Has anyone else encountered this problem with Miro’s OAuth implementation? I’m not sure what else could be causing this authentication failure. Any suggestions on what might be going wrong or how to debug this further would be really helpful.
Happened to me twice - both times it was timing. Miro’s auth codes expire fast, like 10 minutes. If there’s any delay between user authorization and your backend processing the token exchange, you’ll get this error. Also check if you’re accidentally URL-encoding params that shouldn’t be. I wasted hours debugging once because my client_secret was getting double-encoded in my request pipeline. Make the token request right after getting the auth code and see if that fixes it. Still broken? Turn on debug logging for your HTTP client to see what you’re actually sending vs what Miro wants.
check your grant type - it should be ‘authorization_code’, not ‘client_credentials’. also, make sure you didn’t mix the token endpoint with the auth one. and don’t forget to sync your system clock - Miro’s really picky about timestamps.
Had the same problem when building our integration this year. Turned out to be my OAuth app config, not the request itself. Check your app’s OAuth settings - make sure the scopes match what’s in your dashboard. Miro throws 401s when they don’t align. Also caught me off guard: app status. Your Miro app needs approval for the scopes you’re requesting. Some scopes work fine in dev, but production or certain setting changes need manual approval. Double-check your app hasn’t been deactivated or suspended too. The error messages suck at telling you if it’s credentials or app status. I’d create a fresh test app with basic scopes first - helps you figure out if it’s your code or the config that’s broken.
omg, i had the same prob! make sure your redirect_uri is like exactly how you set it in your Miro app settings - sometimes a little thing like a trailing slash can cause that 401 error. and double check your endpoint too: https://api.miro.com/v1/oauth/token.
Had this exact problem last month. Check your Authorization header format first - you might be encoding the client credentials wrong. Send them in the request body instead of as a Basic auth header (unless you’re using client credentials grant). Also make sure your content-type is application/x-www-form-urlencoded. One thing that tripped me up - check if your app’s still in development mode in the Miro console. I saw weird inconsistent behavior when switching between dev and production. Log your actual request and compare it against Miro’s docs. Sometimes it’s not the values that are wrong, it’s how they’re encoded or structured.