What is Slackbot-LinkExpanding?
Slackbot-LinkExpanding is Slack's link unfurling bot that fetches web page content when users post links in channels, extracting meta tags like oEmbed, Twitter Cards, and Open Graph data to display rich media previews. You can set up Agent Analytics to see when Slackbot-LinkExpanding visits your website.
Category
| Example User Agent | Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots) |
| Operated By | Slack |
| Source | Official Website |
| Triggered By | Shared link |
| Used for AI Model Training | Not expected |
| Affects AI Chat & Search Visibility | Not directly |
| Expected To Follow Robots.txt | No |
Why Is Slackbot-LinkExpanding Visiting My Website?
Someone shared a link to your page. Slackbot-LinkExpanding fetched it to build a preview card, and each new share may trigger another request. A spike often means your content is circulating more widely.
Should I Block Slackbot-LinkExpanding?
Usually not. Blocking Slackbot-LinkExpanding may leave shared links without a title or image, making them less inviting to click. If it begins fetching at unexpected volume, try rate limiting before blocking it outright. For context, 6% of the top websites we track currently have robots.txt rules for Slackbot-LinkExpanding.
Insights for Slackbot-LinkExpanding
As of October 29, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
Slackbot-LinkExpanding Traffic
0.0171% of all website traffic is coming from Slackbot-LinkExpanding.
Frequently Asked Questions
What Traffic Patterns Should I Expect From Slackbot-LinkExpanding?
Slackbot-LinkExpanding usually makes a single request within seconds of a URL being shared, without crawling further. Traffic rises and falls with sharing activity, so a widely circulated link can produce a sharp burst of fetches.
Does Slackbot-LinkExpanding Follow Robots.txt Rules?
No. Slackbot-LinkExpanding is not expected to follow robots.txt rules, so a disallow rule only communicates your preference. Enforce the block with firewall or server rules, then use Agent Analytics to verify that its requests stop.
Is Slackbot-LinkExpanding Used for AI Model Training?
Not ordinarily. Slackbot-LinkExpanding is not categorized as an AI training scraper or data provider, so AI model training is not its expected purpose.
Does Blocking Slackbot-LinkExpanding Affect AI Search or Citations?
Not directly. Slackbot-LinkExpanding's expected purpose is not to supply an AI search index or retrieve pages for AI-generated answers.
Does Slackbot-LinkExpanding Access Private Content?
No. Slackbot-LinkExpanding has no credentials and should access only the public URL and assets needed for a preview. It does not continue through the rest of your site.
How Can I Verify a Request From Slackbot-LinkExpanding?
Agent Analytics tracks Slackbot-LinkExpanding visits in real time. You can also check your server logs for requests whose user-agent string contains "Slackbot-LinkExpanding". Look for a page and its preview assets being requested without follow-up navigation. Because Slackbot-LinkExpanding does not publish a verification method, any client can claim its identity and a log match is only a clue.
How Is Slackbot-LinkExpanding Different From Other Slack Agents?
Slack operates separate agents for different purposes, so each agent should be evaluated and controlled independently.
- Slack Image Proxy: Slack Image Proxy is a fetcher operated by Slack.
- Slack-ImgProxy: Slack-ImgProxy is a web crawler used by Slack to fetch, process, and cache images that are shared in Slack channels, ensuring they can be displayed properly within the me…
- Slackbot: Slackbot is operated by Slack and is used to fetch link previews and unfurl content from websites when users share URLs in Slack conversations. When a link is posted, thi…
- SlackbotLinkExpanding: SlackbotLinkExpanding is a fetcher operated by Slack.