Skyreader's feed fetcher

Skyreader refreshes the RSS and Atom feeds its readers subscribe to. It doesn’t crawl or index sites.

How to recognize it

User-Agent: Skyreader/1.0 (+https://skyreader.app)
Signed requests: feed fetches carry a Web Bot Auth signature. The key is published at https://api.skyreader.app/.well-known/http-message-signatures-directory. Cloudflare lists Skyreader as a verified feed fetcher.

robots.txt

Skyreader reads your robots.txt before refreshing a feed and caches it for up to a day.

To block or limit feed refreshes, add a group with the product token Skyreader. Skyreader follows the Disallow and Allow rules in that group:
```
User-agent: Skyreader
Disallow: /
```
Rules for all crawlers (User-agent: *) are treated as written for search engines. Like Google’s feed fetcher and other feed readers, Skyreader still refreshes a feed a reader subscribed to when only the * group disallows it.
Crawl-delay is followed from the Skyreader group, or from * when that group sets none, up to 60 seconds.

Two requests happen once, when a reader asks, and don’t check robots.txt: fetching a page a reader saves, and looking up a site’s feeds when a reader adds it.

Readers whose feed is blocked see that the site doesn’t allow Skyreader’s feed fetcher.