slack-messaging

name	slack-messaging
description	Send messages, manage channels, handle files, and coordinate team communication in Slack via the Slack API. Use this skill when users want to send messages, search conversations, manage channels, create reminders, or automate Slack workflows from chat.

Slack

Manage Slack workspaces — send messages, manage channels, search conversations, handle files, create reminders, and automate team communication via the Slack API.

This skill uses ClawLink for hosted connection flows and credentials so you do not need to configure Slack API access yourself.

Setup in 3 Steps

Step 1: Install	Step 2: Pair Account	Step 3: Connect Slack
		App-specific connection GIF coming soon
Run the install command in OpenClaw	Sign in and approve the device	Open the dashboard and connect Slack

How It Works

┌─────────────────┐     ┌──────────────┐     ┌──────────────────┐
│   OpenClaw      │────▶│   ClawLink   │────▶│   Slack Web API  │
│   (User Chat)   │     │   (OAuth)    │     │                  │
└─────────────────┘     └──────────────┘     └──────────────────┘
         │                       │                       │
         │  1. Install Plugin    │                       │
         │  2. Pair Device       │                       │
         │  3. Connect Slack     │                       │
         │                       │  4. Secure Token      │
         │                       │  5. Proxy Requests    │
         │                       │                       │
         ▼                       ▼                       ▼
   ┌──────────┐           ┌──────────┐           ┌──────────┐
   │  SKILL   │           │ Dashboard│           │  Slack   │
   │  File    │           │ Auth     │           │ Workspace│
   └──────────┘           └──────────┘           └──────────┘

Install

Install the verified ClawLink plugin from ClawHub. After the user confirms, complete the full setup so ClawLink tools are visible in the next OpenClaw chat.

openclaw plugins install clawhub:clawlink-plugin
openclaw config set tools.alsoAllow '["clawlink-plugin"]' --strict-json
openclaw gateway restart

Then tell the user: "OpenClaw has been restarted. Send /new as a standalone message to start a fresh chat, then ask for Slack again."

Quick Start

# List all channels
clawlink_call_tool --tool "slack_list_all_channels" --params '{}'

# Send a message
clawlink_call_tool --tool "slack_send_message" --params '{"channel": "C0123456789", "text": "Hello from OpenClaw!"}'

# Find a user
clawlink_call_tool --tool "slack_find_user_by_email_address" --params '{"email": "[e-mail]"}'

Authentication

All Slack tool calls are authenticated automatically by ClawLink using the user's connected Slack workspace OAuth token.

No API token is required in chat. ClawLink stores the OAuth token securely and injects it into every Slack Web API request on the user's behalf.

Getting Connected

1. Install the ClawLink plugin (see Install above).
2. Pair the plugin with clawlink_begin_pairing if it is not configured yet.
3. Open https://claw-link.dev/dashboard?add=slack and connect Slack.
4. Call clawlink_list_integrations to verify the connection is active.

Connection Management

List Connections

clawlink_list_integrations

Response: Returns all connected integrations. Look for slack in the list.

Verify Connection

clawlink_list_tools --integration slack

Response: Returns the live tool catalog for Slack.

Reconnect

If Slack tools are missing or the connection shows an error:

1. Direct the user to https://claw-link.dev/dashboard?add=slack
2. After they confirm, call clawlink_list_integrations to verify
3. Then call clawlink_list_tools --integration slack

Security & Permissions

• Access is scoped to the Slack workspace connected during OAuth setup and the permissions granted.
• All write operations require explicit user confirmation. Before executing any message send, channel create, or delete call, confirm the target resource and intended effect with the user.
• Destructive actions (delete channel, delete file, delete message) are marked as high-impact and must be confirmed.
• Message sends to external channels or DMs should be confirmed before posting.

Tool Reference

Messages

Tool	Description	Mode
slack_send_message	Send a text message to a channel, DM, or MPDM	Write
slack_send_thread_reply	Reply to a specific message thread	Write
slack_schedule_message	Schedule a message for future delivery	Write
slack_delete_scheduled_message	Delete a pending scheduled message	Write
slack_list_scheduled_messages	List pending scheduled messages in a channel	Read
slack_deletes_a_message_from_a_chat	Delete a message from a channel or DM	Write
slack_update_message	Update an existing message's text	Write

Channels

Tool	Description	Mode
slack_list_all_channels	List all channels in the workspace	Read
slack_find_channels	Search channels by name, topic, or purpose	Read
slack_create_channel	Create a new public or private channel	Write
slack_archive_conversation	Archive a channel (makes it read-only)	Write
slack_rename_channel	Rename an existing channel	Write
slack_set_channel_topic	Set the topic/description of a channel	Write
slack_set_channel_purpose	Set the purpose of a channel	Write
slack_invite_users_to_a_slack_channel	Invite users to a channel	Write
slack_join_an_existing_conversation	Join a channel you have access to	Write
slack_leave_conversation	Leave a channel	Write
slack_close_dm	Close a DM or MPDM conversation	Write

Conversations & History

Tool	Description	Mode
slack_fetch_conversation_history	Get messages from a channel (main timeline, not threads)	Read
slack_fetch_message_thread_from_a_conversation	Get all replies in a specific thread	Read
slack_list_conversations	List conversations accessible to a user	Read

Users

Tool	Description	Mode
slack_list_all_users	List all users in the workspace	Read
slack_find_users	Search users by name, email, or criteria	Read
slack_find_user_by_email_address	Look up a user by their email address	Read
slack_get_user_presence	Get a user's current presence (active/away)	Read
slack_get_user_dnd_status	Get a user's Do Not Disturb status	Read

Files

Tool	Description	Mode
slack_list_files_with_filters_in_slack	List files shared in the workspace	Read
slack_upload_file_to_channel	Upload a file to a channel	Write
slack_delete_file	Permanently delete a file	Write
slack_download_slack_file	Download file content and get a public URL	Read

Reactions

Tool	Description	Mode
slack_add_reaction_to_an_item	Add an emoji reaction to a message	Write
slack_remove_reaction_from_item	Remove a reaction from a message	Write
slack_fetch_item_reactions	Get all reactions on a message	Read

Reminders

Tool	Description	Mode
slack_create_a_reminder	Create a reminder at a specific time	Write
slack_list_reminders	List all your reminders	Read
slack_get_reminder	Get details of a specific reminder	Read
slack_complete_reminder	Mark a reminder as complete	Write
slack_delete_reminder	Delete a reminder	Write

Pins & Stars

Tool	Description	Mode
slack_pin_item	Pin a message to a channel	Write
slack_list_pinned_items	List all pinned items in a channel	Read
slack_remove_pin	Unpin an item from a channel	Write
slack_add_star	Star a channel, file, or message	Write
slack_list_starred_items	List your starred items	Read
slack_remove_star	Remove a star from an item	Write

Canvases

Tool	Description	Mode
slack_create_canvas	Create a new Slack Canvas document	Write
slack_edit_canvas	Edit content in a Canvas	Write
slack_delete_canvas	Delete a Canvas permanently	Write
slack_lookup_canvas_sections	Get section IDs for targeted editing	Read

Team & Admin

Tool	Description	Mode
slack_fetch_team_info	Get workspace metadata and settings	Read
slack_invite_user_to_workspace	Invite a new user to the workspace	Write
slack_create_user_group	Create a user group (subteam)	Write
slack_list_user_groups	List all user groups	Read
slack_disable_user_group	Disable a user group	Write
slack_enable_user_group	Re-enable a disabled user group	Write
slack_list_enterprise_teams	List all teams in an Enterprise Grid org	Read
slack_read_audit_logs	Read Enterprise Grid audit logs	Read

Emoji

Tool	Description	Mode
slack_add_emoji	Add a custom emoji to the workspace	Write
slack_list_custom_emojis	List all custom emoji	Read
slack_remove_emoji	Remove a custom emoji (Enterprise Grid)	Write

Calls

Tool	Description	Mode
slack_get_call_info	Get details about a Slack call	Read
slack_end_call	End an ongoing call	Write
slack_add_call_participants	Add participants to a call	Write
slack_remove_call_participants	Remove participants from a call	Write

Code Examples

Send a message to a channel

clawlink_call_tool --tool "slack_send_message" \
  --params '{
    "channel": "C0123456789",
    "text": "Deployment complete! Version 2.1.0 is live."
  }'

Reply to a thread

clawlink_call_tool --tool "slack_send_thread_reply" \
  --params '{
    "channel": "C0123456789",
    "thread_ts": "1234567890.123456",
    "text": "I will take care of this by end of day."
  }'

Create a channel

clawlink_call_tool --tool "slack_create_channel" \
  --params '{
    "name": "project-alpha",
    "is_private": false
  }'

Schedule a reminder

clawlink_call_tool --tool "slack_create_a_reminder" \
  --params '{
    "text": "Weekly team sync",
    "time": "tomorrow at 10am"
  }'

Find a user and send them a DM

clawlink_call_tool --tool "slack_find_user_by_email_address" \
  --params '{
    "email": "[e-mail]"
  }'

Upload a file to a channel

clawlink_call_tool --tool "slack_upload_file_to_channel" \
  --params '{
    "channel": "C0123456789",
    "content": "File content here",
    "filename": "report.csv",
    "title": "Q1 Report"
  }'

Discovery Workflow

1. Call clawlink_list_integrations to confirm Slack is connected.
2. Call clawlink_list_tools --integration slack to see the live catalog.
3. Treat the returned list as the source of truth. Do not guess or assume what tools exist.
4. If the user describes a capability but the exact tool is unclear, call clawlink_search_tools with a short query and integration slack.
5. If no Slack tools appear, direct the user to https://claw-link.dev/dashboard?add=slack.

Execution Workflow

┌─────────────────────────────────────────────────────────────┐
│  READ OPERATIONS (Safe)                                     │
│  list → get → search → find → call                         │
│                                                             │
│  Example: Find channel → Get history → Show messages       │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│  WRITE OPERATIONS (Require Confirmation)                    │
│  describe → preview → confirm → call                        │
│                                                             │
│  Example: Preview message → User approves → Send message    │
└─────────────────────────────────────────────────────────────┘

1. For unfamiliar tools, ambiguous requests, or any write action, call clawlink_describe_tool first.
2. Use the returned guidance, schema, whenToUse, askBefore, safeDefaults, examples, and followups to shape the call.
3. Prefer read, list, search, and get operations before writes when that reduces ambiguity.
4. For writes or anything marked as requiring confirmation, call clawlink_preview_tool first.
5. Execute with clawlink_call_tool. Pass confirmation only after the preview matches the user's intent.
6. If the tool call fails, report the real error. Do not invent results or restate the failure as a missing capability unless the live catalog supports that conclusion.

Notes

• slack_fetch_conversation_history returns messages from the main channel timeline only — threaded replies require slack_fetch_message_thread_from_a_conversation.
• Channel IDs (C*/G*) are required for most Slack tools — use slack_find_channels to resolve display names to IDs.
• Message scheduling accepts natural language times (e.g., "in 15 minutes", "every Thursday at 2pm") or Unix timestamps.
• DMs and MPDMs use channel IDs starting with D or G respectively.
• File uploads are limited by Slack's constraints; large files may need to be uploaded to a file host first.
• Rate limits apply to many endpoints (~1-2 requests/second for list operations); honor Retry-After headers.

Error Handling

Status / Error	Meaning
Tool not found	The tool name does not exist in the current catalog. Verify with clawlink_list_tools --integration slack.
Missing connection	Slack is not connected. Direct the user to https://claw-link.dev/dashboard?add=slack.
channel_not_found	The channel ID does not exist or the bot is not a member.
user_not_found	The user email or ID does not match any workspace member.
not_authed	The OAuth token is invalid or has been revoked. Reconnect Slack.
missing_scope	The token lacks the required scope for this operation.
message_not_found	The message timestamp does not match any message in the channel.
cant_update_message	Only the message author or workspace admin can edit a message.
is_archived	The target channel has been archived.
send_as_app	The message requires a bot token. The user may need to use a different connection method.
Write rejected	User did not confirm a write action. Always confirm before executing writes.

Troubleshooting: Tools Not Visible

1. Check that the ClawLink plugin is installed:

   openclaw plugins list
   

2. If the plugin is installed but tools are missing, tell the user to send /new as a standalone message to reload the catalog.
3. If a fresh chat does not help, run:

   openclaw config set tools.alsoAllow '["clawlink-plugin"]' --strict-json
   openclaw gateway restart
   

4. After restart, tell the user to send /new again and retry.

Troubleshooting: Invalid Tool Call

1. Ensure the integration slug is exactly slack.
2. Use clawlink_describe_tool to verify parameter names and types before calling.
3. For write operations, always call clawlink_preview_tool first.
4. Resolve channel names to IDs using slack_find_channels before calling tools that require a channel ID.

Troubleshooting: Empty Results

1. slack_fetch_conversation_history returns empty — the tool only fetches the main timeline, not threaded replies. Use slack_fetch_message_thread_from_a_conversation with the parent message's thread_ts.
2. slack_find_channels returns empty — the channel may be private or the bot may not be a member. Use the channel ID directly if known.
3. slack_list_all_users returns incomplete results — this may reflect guest account visibility settings, not a real absence.

Resources

• Slack API Documentation
• Slack Web API Reference
• Slack Rate Limits
• ClawLink: https://claw-link.dev/?utm_source=clawhub&utm_medium=referral&utm_content=clawlink-slack
• ClawLink Docs: https://docs.claw-link.dev/openclaw
• ClawLink Verification: https://claw-link.dev/verify

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