Social preview fetchers: the bots behind link cards
Social preview fetchers load a page when someone shares its link and build the title, description and image card. Blocking them breaks link previews.
Fetches a page when someone shares its link, to build the preview card (title, description, image). It acts for the person who shared the link.
2 bots in this group
| Bot | Owner | robots.txt token | Honors robots.txt? | Requests on our sites (30 days) |
|---|---|---|---|---|
| facebookexternalhit | Meta | facebookexternalhit | May bypass (integrity checks) | none yet |
| Slackbot | Slack | Slackbot | No, per Slack | none yet |
No request from this group has been recorded on our sites in the last 30 days.