ListspaceBot

• Only a link a signed-in person added to one of their items, in its title, its description or as an attachment. It does not crawl and never follows other links on the page.
• One request for the page. When the page has no title or image tags but names an oEmbed address, it asks that address too.
• For a book, it asks the public Open Library API at openlibrary.org for the book's details.
• Only web pages (HTML). It reads at most 1 MB, gives up after 5 seconds and follows at most 3 redirects.
• It does not run scripts and does not download images. The preview image is loaded by the person's own browser, straight from your site, without a referrer.

• Each address is fetched once and the preview is kept for 7 days, shared by everyone who adds the same link. A page that could not be read is tried again after a day at the earliest.
• A preview is stored with the item, so opening the item again does not fetch the page again.
• Each person can make at most 60 new previews in 10 minutes.

• A plain GET over HTTPS or HTTP, on the standard ports 80 and 443 only.
• No cookies, no login and no Authorization header. It sends only User-Agent, Accept, Accept-Language and Accept-Encoding.
• Requests come from our server in Germany.
• It never fetches private, internal or local network addresses, also not after a redirect.

The title, description and site name of the page, the addresses of its image, icon and canonical page, and for a book the Open Library record. Not the page itself.

ListspaceBot does not read robots.txt. Like a browser, it fetches a single page because a person asked for it, and it never crawls. To stop it, block the User-Agent ListspaceBot on your server, or write to us.