# Slackbot

> The other half of Slack's pair: the agent that reads robots.txt and handles Slack's non-unfurl fetches. Slack documents both strings on one page.

| field | value |
|---|---|
| operator | Slack |
| category | Link preview fetchers |
| robots.txt token | `Slackbot` |
| user-agent contains | `Slackbot` |
| 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

Slack stops being able to read your robots.txt, which is a strange thing to want. Block the link expander instead if that is the goal.

## Full user-agent string

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

## Block it

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

## Allow it

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

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