# Slackbot-LinkExpanding

> Fetches a page to build the unfurl card when somebody pastes your link into Slack. One paste, one fetch.

| field | value |
|---|---|
| operator | Slack |
| category | Link preview fetchers |
| robots.txt token | `Slackbot-LinkExpanding` |
| user-agent contains | `Slackbot-LinkExpanding` |
| robots.txt | obeys robots.txt (documented) |
| verify by | no published verification method |
| published IP ranges | none published |
| prefixes mirrored | 0 IPv4 / 0 IPv6 |
| operator docs | https://api.slack.com/robots |
| last reviewed | 2026-09-01 |

## What blocking it costs you

Your links appear in Slack as bare URLs. Inside working teams that quietly costs you clicks, and nothing is gained.

## Full user-agent string

```
Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots)
```

## Block it

```
User-agent: Slackbot-LinkExpanding
Disallow: /
```

## Allow it

```
User-agent: Slackbot-LinkExpanding
Allow: /
```

JSON: https://www.pathwren.workers.dev/crawler/slackbot-linkexpanding.json · index: https://www.pathwren.workers.dev/llms.txt