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Interact with Slack workspaces - send messages, search channels/messages/users, read threads, manage canvases
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Basé sur la classification professionnelle SOC
| name | slack |
| description | Interact with Slack workspaces - send messages, search channels/messages/users, read threads, manage canvases |
| user-invocable | false |
| allowed-tools | Bash(agent-slack *) |
A token-efficient CLI that replaces the Slack MCP tools. Use agent-slack for all Slack operations.
Run agent-slack login to authenticate via OAuth. The token is saved to ~/.agent-slack/config.json.
These flags work on every subcommand:
| Flag | Description |
|---|---|
--detailed | Verbose output with all fields |
--json | Raw JSON output (structured, parseable) |
Default output is concise — minimal text optimized for token efficiency.
Commands that accept message text or canvas content support 3 input methods:
# 1. Inline text (simple messages)
agent-slack send-message --channel C12345 --text "Hello team"
# 2. From a file (complex/long content)
agent-slack send-message --channel C12345 --text-file /tmp/message.md
# 3. From stdin (piped content)
echo "Hello team" | agent-slack send-message --channel C12345
cat message.md | agent-slack send-message --channel C12345
For create-canvas, use --content / --content-file instead of --text / --text-file.
Tip: Prefer --text-file for multi-line or complex messages to avoid shell escaping issues.
Send a message to a channel or thread.
agent-slack send-message --channel <id> [--text <text>] [--text-file <file>] [--thread-ts <ts>] [--reply-broadcast]
Required: --channel
Content: --text, --text-file, or stdin (required — one must be provided)
| Flag | Description |
|---|---|
--channel <id> | Channel ID (e.g. C12345) or name |
--text <text> | Inline message text |
--text-file <file> | Path to file with message text |
--thread-ts <ts> | Reply to this thread timestamp |
--reply-broadcast | Also post thread reply to the channel |
Output examples:
# concise (default)
Message sent to C12345 (ts: 1234567890.123456)
# detailed
{
"ts": "1234567890.123456",
"channel": "C12345",
"message": { ... }
}
# json (raw API response)
{ "ok": true, "ts": "...", "channel": "...", ... }
Examples:
agent-slack send-message --channel C12345 --text "Deploy complete"
agent-slack send-message --channel C12345 --text-file /tmp/update.md
agent-slack send-message --channel C12345 --text "Reply" --thread-ts 1234567890.000001
echo "Quick note" | agent-slack send-message --channel general
Schedule a message to be sent at a future time.
agent-slack schedule-message --channel <id> --post-at <time> [--text <text>] [--text-file <file>] [--thread-ts <ts>] [--reply-broadcast]
Required: --channel, --post-at
Content: --text, --text-file, or stdin
| Flag | Description |
|---|---|
--channel <id> | Channel ID or name |
--post-at <time> | Unix timestamp (e.g. 1700000000) or ISO 8601 (e.g. 2025-11-15T09:00:00Z) |
--text <text> | Inline message text |
--text-file <file> | Path to file with message text |
--thread-ts <ts> | Schedule as reply to this thread |
--reply-broadcast | Also post thread reply to the channel |
Output examples:
# concise
Message scheduled in C12345 for 2023-11-15T00:00:00.000Z (id: Q12345)
# detailed
{
"scheduled_message_id": "Q12345",
"channel": "C12345",
"post_at": 1700000000,
"post_at_human": "2023-11-15T00:00:00.000Z"
}
Examples:
agent-slack schedule-message --channel C12345 --text "Weekly reminder" --post-at 1700000000
agent-slack schedule-message --channel C12345 --text "Meeting" --post-at "2025-11-15T09:00:00Z"
Create a draft message in a channel (not sent immediately).
agent-slack draft-message --channel <id> [--text <text>] [--text-file <file>] [--thread-ts <ts>] [--reply-broadcast]
Required: --channel
Content: --text, --text-file, or stdin
| Flag | Description |
|---|---|
--channel <id> | Channel ID or name |
--text <text> | Inline message text |
--text-file <file> | Path to file with message text |
--thread-ts <ts> | Create draft as thread reply |
--reply-broadcast | Also post thread reply to the channel |
Note: Uses the undocumented Slack drafts.create API endpoint.
Output examples:
# concise
Draft created in C12345
# detailed
{
"channel": "C12345",
"channel_link": "https://slack.com/app_redirect?channel=C12345",
"draft": { ... }
}
Examples:
agent-slack draft-message --channel C12345 --text "Draft announcement"
cat announcement.md | agent-slack draft-message --channel general
Create a Slack Canvas document with Markdown content.
agent-slack create-canvas --title <title> [--content <md>] [--content-file <file>]
Required: --title
Content: --content, --content-file, or stdin
| Flag | Description |
|---|---|
--title <title> | Canvas title |
--content <md> | Inline Markdown content |
--content-file <file> | Path to file with Markdown content |
Output examples:
# concise
Canvas created: My Canvas (id: F12345CANVAS)
# detailed
{
"canvas_id": "F12345CANVAS",
"title": "My Canvas"
}
Examples:
agent-slack create-canvas --title "Project Spec" --content "# Overview\n\nDetails here."
agent-slack create-canvas --title "Meeting Notes" --content-file /tmp/notes.md
cat spec.md | agent-slack create-canvas --title "API Design"
Read messages from a Slack channel in reverse chronological order.
agent-slack read-channel --channel <id> [--limit <n>] [--oldest <ts>] [--latest <ts>] [--cursor <cursor>]
Required: --channel
| Flag | Default | Description |
|---|---|---|
--channel <id> | — | Channel ID |
--limit <n> | 100 | Number of messages to fetch |
--oldest <ts> | — | Only messages after this Unix timestamp |
--latest <ts> | — | Only messages before this Unix timestamp |
--cursor <cursor> | — | Pagination cursor from previous response |
Output examples:
# concise (one line per message)
alice: Hello team [10:30 AM] [3 replies] [thumbsup(2)]
bob: Deploy is done [10:32 AM]
# detailed (per-message blocks)
=== Message (ts: 1234567890.123456) ===
From: alice
Time: 10:30 AM (1234567890.123456)
Text: Hello team
Replies: 3
Reactions: :thumbsup: (2)
--- Next cursor: dGVhbTpDMDY= ---
Examples:
agent-slack read-channel --channel C12345
agent-slack read-channel --channel C12345 --limit 20
agent-slack read-channel --channel C12345 --oldest 1700000000 --latest 1700086400
agent-slack read-channel --channel C12345 --cursor dGVhbTpDMDY=
Read all messages in a Slack thread.
agent-slack read-thread --channel <id> --ts <ts> [--limit <n>] [--oldest <ts>] [--latest <ts>] [--cursor <cursor>]
Required: --channel, --ts
| Flag | Default | Description |
|---|---|---|
--channel <id> | — | Channel ID containing the thread |
--ts <ts> | — | Timestamp of the parent (thread root) message |
--limit <n> | 100 | Number of messages to fetch |
--oldest <ts> | — | Only messages after this timestamp |
--latest <ts> | — | Only messages before this timestamp |
--cursor <cursor> | — | Pagination cursor |
Output examples:
# concise (parent + replies with > prefix)
alice: What do you think about the new design? [02:00 PM]
> bob: Looks great, ship it [02:05 PM]
> carol: +1 from me [02:07 PM]
# detailed
=== THREAD PARENT (ts: 1234567890.123456) ===
From: alice
Text: What do you think about the new design?
Examples:
agent-slack read-thread --channel C12345 --ts 1234567890.123456
agent-slack read-thread --channel C12345 --ts 1234567890.123456 --limit 50
Get profile information for a Slack user.
agent-slack read-user-profile [--user <id>]
| Flag | Description |
|---|---|
--user <id> | User ID (omit to get the authenticated user's own profile) |
Output examples:
# concise
@alice (Alice Smith)
Software Engineer
alice@example.com
Status: Working from home
# detailed
User ID: U12345
Username: @alice
Display Name: Alice Smith
Real Name: Alice Smith
Title: Software Engineer
Email: alice@example.com
Status: Working from home
Time Zone: America/New_York
Admin: No
Owner: No
Bot: No
Examples:
agent-slack read-user-profile # authenticated user
agent-slack read-user-profile --user U12345
agent-slack read-user-profile --user U12345 --json
Read the content of a Slack Canvas document.
agent-slack read-canvas --canvas <id>
Required: --canvas
| Flag | Description |
|---|---|
--canvas <id> | Canvas ID (starts with F) |
Output examples:
# concise (section content joined)
# Project Overview
This document describes...
## Goals
- Ship by Q4
- Reduce latency
# detailed (with section IDs)
--- Section section1 ---
# Project Overview
This document describes...
Examples:
agent-slack read-canvas --canvas F12345CANVAS
agent-slack read-canvas --canvas F12345CANVAS --json
Search for Slack channels by name, purpose, or topic. Uses client-side filtering against conversations.list.
agent-slack search-channels --query <query> [--types <types>] [--limit <n>] [--include-archived] [--cursor <cursor>]
Required: --query
| Flag | Default | Description |
|---|---|---|
--query <query> | — | Search term (matched against name, purpose, topic) |
--types <types> | public_channel | Comma-separated channel types (see Channel Types below) |
--limit <n> | 20 | Max results to fetch from API before filtering |
--include-archived | false | Include archived channels |
--cursor <cursor> | — | Pagination cursor |
Output examples:
# concise
#general - Company-wide announcements [142 members]
#engineering - Engineering team [38 members]
# detailed
Name: #general
ID: C12345
Creator: U67890
Created: 2020-01-15T00:00:00.000Z
Purpose: Company-wide announcements
Members: 142
Archived: no
Examples:
agent-slack search-channels --query "engineering"
agent-slack search-channels --query "project" --types "public_channel,private_channel"
agent-slack search-channels --query "old" --include-archived
Search messages in public Slack channels.
agent-slack search-messages --query <query> [--sort <sort>] [--sort-dir <dir>] [--limit <n>] [--page <n>]
Required: --query
| Flag | Default | Description |
|---|---|---|
--query <query> | — | Search query with optional modifiers (see Search Syntax) |
--sort <sort> | score | Sort order: score or timestamp |
--sort-dir <dir> | desc | Sort direction: asc or desc |
--limit <n> | 20 | Max results per page |
--page <n> | — | Page number for pagination |
Output examples:
# concise
#general [alice, 10:30 AM]: Deploy is complete
#engineering [bob, 09:15 AM]: PR is ready for review
# detailed
=== Result 1 of 5 ===
Channel: #general (C12345)
From: alice (U12345)
Time: 2024-01-15 10:30:45 UTC (1705316445.123456)
Text: Deploy is complete
Examples:
agent-slack search-messages --query "deploy complete"
agent-slack search-messages --query "from:<@U12345> in:engineering PR"
agent-slack search-messages --query "bug after:2024-01-08" --sort timestamp
agent-slack search-messages --query "incident has:pin"
Search messages across all channels including private channels, group DMs, and DMs.
agent-slack search-all --query <query> [--sort <sort>] [--sort-dir <dir>] [--limit <n>] [--channel-types <types>] [--page <n>]
Required: --query
| Flag | Default | Description |
|---|---|---|
--query <query> | — | Search query with optional modifiers |
--sort <sort> | score | Sort order: score or timestamp |
--sort-dir <dir> | desc | Direction: asc or desc |
--limit <n> | 20 | Max results per page |
--channel-types <types> | public_channel,private_channel,mpim,im | Channel types to search |
--page <n> | — | Page number for pagination |
Same output format as search-messages.
Examples:
agent-slack search-all --query "budget approval"
agent-slack search-all --query "from:<@U12345> action item" --channel-types "im,mpim"
agent-slack search-all --query "secret project" --sort timestamp --sort-dir asc
Search for Slack users by name, username, email, or title. Uses client-side filtering against users.list.
agent-slack search-users --query <query> [--limit <n>] [--cursor <cursor>]
Required: --query
| Flag | Default | Description |
|---|---|---|
--query <query> | — | Search term (matched against username, name, email, title) |
--limit <n> | 20 | Max users to fetch from API before filtering |
--cursor <cursor> | — | Pagination cursor |
Output examples:
# concise
@alice (Alice Smith) - Software Engineer
@alice.jones (Alice Jones) - Product Manager
# detailed
Username: @alice
ID: U12345
Real Name: Alice Smith
Display Name: Alice
Title: Software Engineer
Email: alice@example.com
Timezone: America/New_York
Admin: no
Bot: no
Examples:
agent-slack search-users --query "alice"
agent-slack search-users --query "engineer" --limit 50
agent-slack search-users --query "alice@example.com"
The search-messages and search-all commands support Slack's full search modifier syntax in the --query value.
in:channel-name Search in a specific channel
in:<#C123456> Search in channel by ID
-in:channel Exclude a channel
in:@username Search in DMs with a user
from:<@U123456> Messages from a specific user (by ID)
from:username Messages from a user (by username)
to:<@U123456> Messages sent to a user
is:thread Only threaded messages
has:pin Pinned messages only
has:link Messages containing links
has:file Messages with attachments
has::emoji: Messages with a specific reaction emoji
"exact phrase" Search for an exact phrase
-word Exclude results containing a word
before:YYYY-MM-DD Messages before a date
after:YYYY-MM-DD Messages after a date
on:YYYY-MM-DD Messages on a specific date
during:month e.g. during:january
during:year e.g. during:2024
# Messages from alice in engineering channel about bugs
agent-slack search-messages --query "from:<@U12345> in:engineering bug"
# Pinned messages about the incident after a date
agent-slack search-messages --query "incident has:pin after:2024-01-01"
# Exact phrase search
agent-slack search-messages --query "\"production outage\""
# Messages with files in a channel
agent-slack search-messages --query "in:general has:file"
Used with --types in search-channels and --channel-types in search-all:
| Type | Description |
|---|---|
public_channel | Public channels (default) |
private_channel | Private channels |
mpim | Group direct messages (multi-party DMs) |
im | Direct messages (1:1 DMs) |
Combine with commas: --channel-types "public_channel,private_channel"
Every command supports three output modes controlled by global flags:
| Mode | Flag | Use when |
|---|---|---|
| Concise (default) | (none) | Reading output in context, token-efficient |
| Detailed | --detailed | Need full field information |
| JSON | --json | Programmatic processing, piping to jq |
# Concise (default) - minimal output
agent-slack read-channel --channel C12345
# Detailed - verbose human-readable
agent-slack read-channel --channel C12345 --detailed
# JSON - structured, pipe-friendly
agent-slack read-channel --channel C12345 --json | jq '.messages[0].text'
Pagination varies by command type:
Cursor-based (read-channel, read-thread, search-channels, search-users): Use --cursor with the cursor value shown at the end of output. Pagination is complete when no "Next cursor" appears in the output (the cursor is empty).
--- Next cursor: dGVhbTpDMDYxRkE1UEI= ---
agent-slack read-channel --channel C12345 --cursor dGVhbTpDMDYxRkE1UEI=
Page-based (search-messages, search-all): Use --page <n>. Output shows "Page X of Y" when multiple pages exist. Pagination is complete when the current page equals the total pages.
agent-slack search-messages --query "deploy" --page 2
On error, agent-slack prints a friendly message to stderr and exits with code 1.
| Slack Error Code | Meaning |
|---|---|
channel_not_found | Invalid channel ID or no access |
not_in_channel | Bot is not a member of the channel |
invalid_auth | Token is invalid or expired |
missing_scope | Token lacks required OAuth scope |
ratelimited | Too many requests — back off and retry |
user_not_found | Invalid user ID |
channel_not_archived | Operation requires an archived channel |
# Example error output (stderr)
Error: No Slack token found. Set SLACK_TOKEN env var, use --token flag, or add token to ~/.agent-slack/config.json
# Slack API error
Slack API error: An API error occurred: channel_not_found (code: channel_not_found)
Authenticate with Slack via OAuth. Opens a browser for authorization and saves the token automatically.
agent-slack login [--port <port>]
| Flag | Default | Description |
|---|---|---|
--port <port> | 9876 | Local callback server port |
Examples:
agent-slack login
agent-slack login --port 3000
Remove the stored Slack token from ~/.agent-slack/config.json.
agent-slack logout
Examples:
agent-slack logout
Use concise output by default — it's the most token-efficient. Only use --detailed or --json when you need specific fields.
Prefer --text-file for long content — avoids shell escaping issues with multi-line strings, special characters, or Markdown.
Use --json when parsing output — pipe to jq for reliable field extraction:
agent-slack send-message --channel C12345 --text "hi" --json | jq -r '.ts'
Get channel IDs first — commands require channel IDs (e.g. C12345), not names. Use search-channels to find IDs:
agent-slack search-channels --query "engineering" --json | jq -r '.channels[0].id'
For thread replies, capture ts from send-message — the timestamp returned is what you need for --thread-ts on subsequent messages.
Paginate large results — read-channel defaults to 100 messages. Use --limit and --cursor for large channels.
search-all vs search-messages — search-messages searches public channels only. Use search-all when you need to search private channels, DMs, or group DMs. Both use page-based pagination (--page).