# I cannot connect Mastodon AP
**URL:** https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803
**Category:** Bug
**Tags:** activitypub
**Created:** [March 19, 2026, 12:48pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803 "2026-03-19T12:48:19Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@roke\_julian\_lockhart](https://meta.discourse.org/u/roke_julian_lockhart)
#### Post date: [March 19, 2026, 12:48pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/1 "2026-03-19T12:48:19Z")
When I attempt to connect to `//mastodon.social/oauth/authorize`, I observe:
> The requested scope is invalid, unknown, or malformed.
To demonstrate:
[ ](https://www.youtube.com/watch?v=kOiCQ4H63E8)
> ****
>
> > [@I cannot upload a GIF, for a non-descript error appears](https://meta.discourse.org/t/i-cannot-upload-a-gif-for-a-non-descript-error-appears/398808):
> >
> > For [meta.discourse.org/t/398803/1](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/1), I attempted to upload an image/GIF file. However, Discourse returns a non-descript error, despite the file being 15 FPS, and \< 600 KiB: "response": { "status": 422, "statusText": "", "httpVersion": "HTTP/2", "content": { "mimeType": "application/json; charset=utf-8", "size": 63, "text": "{\"errors\":[\"Sorry, but your upload failed. Please try again.\"]}" }, "redirectURL": "", "headersSize": 438, "bodySize": 501 }, My Environmen…
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### Author:  [@sam](https://meta.discourse.org/u/sam)
#### Post date: [March 23, 2026, 12:51am UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/2 "2026-03-23T00:51:24Z")
FYI @pmusaraj / @angus in case you have ideas.
My guess here is … they started requiring a scope in the OAuth payload for security reasons.
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### Author:  [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [March 23, 2026, 2:15pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/3 "2026-03-23T14:15:47Z")
Looks like Mastodon renamed `scope` to `scopes`… not clear if this happened for a specific version, but when I rename the param in the URL I go from a broken URL (like your video) to
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### Author:  [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [March 23, 2026, 3:15pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/5 "2026-03-23T15:15:04Z")
A potential fix in [FIX: Switch to `scopes` from `scope` for Mastodon verification by pmusaraj · Pull Request #297 · discourse/discourse-activity-pub · GitHub](https://github.com/discourse/discourse-activity-pub/pull/297), but I need to report this upstream to Mastodon… not seeing if/when the spec changed here.
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### Author:  [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [March 23, 2026, 10:14pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/6 "2026-03-23T22:14:26Z")
This should be fixed now here on meta.
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### Author:  [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [March 28, 2026, 12:01pm UTC](https://meta.discourse.org/t/i-cannot-connect-mastodon-ap/398803/8 "2026-03-28T12:01:01Z")
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