🎯

slack

🎯Skill

from vm0-ai/vm0-skills

What it does

Sends and retrieves messages, manages channels, and interacts with Slack workspaces using the Slack API.

📦

Part of

vm0-ai/vm0-skills(138 items)

slack

Installation

Add MarketplaceAdd marketplace to Claude Code

/plugin marketplace add vm0-ai/vm0-skills

Install PluginInstall plugin from marketplace

/plugin install notion@vm0-skills

Install PluginInstall plugin from marketplace

/plugin install slack-webhook@vm0-skills

git cloneClone repository

git clone https://github.com/vm0-ai/vm0-skills.git

📖 Extracted from docs: vm0-ai/vm0-skills

Need more details? View full documentation on GitHub →

12Installs

AddedFeb 4, 2026

View on GitHub Back to Skills

Skill Details

SKILL.md

Slack API for sending messages, reading channels, and managing conversations. Use this skill to post messages, upload files, and interact with Slack workspaces.

Overview

# Slack API

Send messages, read channels, and interact with Slack workspaces.

When to Use

Send messages to channels or users
Read channel message history
Upload files to Slack
List channels and users
Add reactions to messages

Prerequisites

```bash

export SLACK_BOT_TOKEN=xoxb-your-bot-token

```

Get Token

Create app: https://api.slack.com/apps
Add Bot Token Scopes (OAuth & Permissions):

- chat:write - Send messages

- channels:read - List public channels

- channels:history - Read channel messages

- files:write - Upload files

- users:read - List users

- reactions:write - Add reactions

Install to Workspace
Copy "Bot User OAuth Token" (xoxb-...)

> Important: When using $VAR in a command that pipes to another command, wrap the command containing $VAR in bash -c '...'. Due to a Claude Code bug, environment variables are silently cleared when pipes are used directly.

> ```bash

> bash -c 'curl -s "https://api.example.com" -H "Authorization: Bearer $API_KEY"'

> ```

Core APIs

List Channels

```bash

bash -c 'curl -s -H "Authorization: Bearer $SLACK_BOT_TOKEN" "https://slack.com/api/conversations.list?types=public_channel"' | jq '.channels[] | {id, name}'

```

Docs: https://docs.slack.dev/reference/methods/conversations.list

Get Channel History

Replace with the actual channel ID:

```bash

bash -c 'curl -s -H "Authorization: Bearer $SLACK_BOT_TOKEN" "https://slack.com/api/conversations.history?channel=&limit=10"' | jq '.messages[] | {ts, user, text}'

```

Docs: https://docs.slack.dev/reference/methods/conversations.history

Send Message

Write to /tmp/request.json:

```json

{

"channel": "",

"text": "Hello, World"

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/chat.postMessage" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

Docs: https://docs.slack.dev/reference/methods/chat.postmessage

Send with Blocks

Write to /tmp/request.json:

```json

{

"channel": "",

"text": "Notification",

"blocks": [

{

"type": "section",

"text": {"type": "mrkdwn", "text": "Alert: Something happened"}

{

"type": "section",

"fields": [

{"type": "mrkdwn", "text": "Status:\nActive"},

{"type": "mrkdwn", "text": "Priority:\nHigh"}

]

}

]

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/chat.postMessage" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

Block Kit Builder: https://app.slack.com/block-kit-builder

Reply in Thread

Write to /tmp/request.json:

```json

{

"channel": "",

"thread_ts": "",

"text": "Thread reply"

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/chat.postMessage" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

Update Message

Write to /tmp/request.json:

```json

{

"channel": "",

"ts": "",

"text": "Updated message"

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/chat.update" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

Docs: https://docs.slack.dev/reference/methods/chat.update

Delete Message

Write to /tmp/request.json:

```json

{

"channel": "",

"ts": ""

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/chat.delete" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

List Users

```bash

bash -c 'curl -s -H "Authorization: Bearer $SLACK_BOT_TOKEN" "https://slack.com/api/users.list"' | jq '.members[] | {id, name, real_name}'

```

Docs: https://docs.slack.dev/reference/methods/users.list

Get User by Email

Replace with the actual email address:

```bash

bash -c 'curl -s -H "Authorization: Bearer $SLACK_BOT_TOKEN" "https://slack.com/api/users.lookupByEmail?email="'

```

Docs: https://docs.slack.dev/reference/methods/users.lookupbyemail

Upload File

```bash

curl -s -X POST 'https://slack.com/api/files.upload' -H "Authorization: Bearer $SLACK_BOT_TOKEN" -F 'channels=C1234567890' -F 'file=@/path/to/file.txt' -F 'title=My File'

```

Docs: https://docs.slack.dev/reference/methods/files.upload

Add Reaction

Write to /tmp/request.json:

```json

{

"channel": "",

"timestamp": "",

"name": "thumbsup"

}

```

```bash

bash -c 'curl -s -X POST "https://slack.com/api/reactions.add" -H "Authorization: Bearer $SLACK_BOT_TOKEN" -H "Content-Type: application/json" -d @/tmp/request.json'

```

Docs: https://docs.slack.dev/reference/methods/reactions.add

Message Formatting

| Syntax | Result |

|--------|--------|

| bold | bold |

| _italic_ | _italic_ |

| ~strike~ | ~~strike~~ |

| ` code | code` |

| | hyperlink |

| <@U123> | @mention user |

| <#C123> | #channel link |

Rate Limits

Tier 1: 1 request/second
Tier 2: 20 requests/minute
Tier 3: 50 requests/minute
Tier 4: 100 requests/minute

See: https://docs.slack.dev/apis/web-api/rate-limits

API Reference

All Methods: https://docs.slack.dev/reference/methods
Scopes: https://docs.slack.dev/reference/scopes
Block Kit: https://docs.slack.dev/reference/block-kit
App Management: https://api.slack.com/apps

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