I wrote a nano tool that tries to extract the #Fediverse accounts of your #Twitter followings: https://fedifinder.glitch.me/

It searches for the patterns @[email protected], [email protected] and host.tld/@user in the screen name, description, location and URL field. It displays them to you in the correct format for easy copying as well as a CSV download that can be imported to #Mastodon.

New version: https://fedifinder-backup.glitch.me/

Fedifinder

Fediverse accounts of your X/Twitter followings

@Luca Let's hope that Twitter does not block your API key... the last tool that did something similar has been blocked pretty quickly. :/
@anathem @Luca strange, I can't see a good reason for a block (although friends/follow endpoints have low rate limits)

@andypiper @Luca I've had multiple birdsite bots, and for each I did have to write a description on whay it does. One has been declined from the start, another blocked later. Best answer to the why was "Does not foster the community" (transcribed from memory).
I assume that the same happened to the mentioned tool, and I suspect that the same will happen to this tool, as soon as someone at Birdsite checks what the tool does.

But, as long as the API key works, let's just use it! \o/