Built-in sources
How a source works in the reader: paste the platform's own link, the options live in the feed address and the Source tab, and the icon is the platform's own.
A built-in source is a platform MicroRSS reads without a feed: a Telegram channel from its public page, a Bluesky profile from its API, a GitHub repository's issues, a Bandcamp label's releases, the free games on the Epic Games Store, and the rest of the list. Each source page there says what the entries carry, which links work and what the options are.
Adding one
Paste the platform's link into Add Feed, the one you would open in a browser: https://t.me/channel, https://bsky.app/profile/name, https://github.com/owner/repo/issues. MicroRSS recognises it from the link alone, without fetching the page, and subscribes you to the source. The entry list then looks like any feed's.
Many sites publish a feed that their pages never link to: a subreddit, a Mastodon account, a Medium publication, a YouTube channel, a Steam game's news. For those, the same paste finds the feed the site serves; they are listed under the same catalogue as the sites with a hidden feed.
Options
A source's options are part of the feed address, so they travel with an OPML export and two readers choosing the same options share one feed. Feed Settings shows the source's name under Feed URL and, for a source with options, a Source tab that edits them: a Docker Hub repository's tag filter, the country of the Epic Games Store, whether a Bluesky feed includes replies. Changing an option fetches the new feed at once and carries your read and bookmarked entries over by their links.
Icons and names
The feed's icon is the platform's own: the channel's avatar, the account's picture, the repository owner's avatar. The title is the source's name, which you can change in General.
When a source fails
A private Telegram channel, a deleted account, a repository that went private: the fetch fails with the reason, visible in the fetch log. Some platforms refuse servers outright whatever the request looks like; those are noted on the source's page as not readable.