Search Slack for Past Decisions and Conversations
Find specific messages, decisions, or discussions across your Slack workspace without manual scrolling.
Find and Look Up Slack Users
Look up team members in your Slack workspace to find their username, status, or contact details.
Quick answer: Use the Slack tool through ToolRouter to find and look up slack users directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolIn a large workspace, knowing someone's exact Slack username — the version you need to @mention them or send them a direct message — is surprisingly hard without a reliable way to search the user directory. Spelling their name slightly differently or guessing their handle wastes time and sometimes mentions the wrong person entirely.
The find_user and list_users skills let you look up workspace members by name, email, or role to get their exact Slack username, display name, status, and profile information. You can find a specific person or list all members of the workspace.
Managers adding new team members to channels, agents routing messages to the right person, and anyone onboarding to a new workspace use this to find the right Slack handle without guessing.
How to find and look up slack users with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Claude looks up Slack users by name or description and returns their exact handle and profile details. Useful when you want to @mention someone or send a direct message but are not sure of their exact username.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
How to find and look up slack users with Claude
Once connected (see setup above), use the Slack tool:
- Ask: "Find the Slack user for someone named [name]"
- Claude searches the workspace and returns the matching user profile
- Ask: "What is their current status?"
- Use the username to send a message or add them to a channel
Example prompt for Claude
Try this with Claude using the Slack tool
Find the Slack user for Sarah Johnson on my team and tell me her username and current status.
Tips for Claude
- Search by first name, last name, or email if you are unsure of the full name
- Ask Claude to list all users with a specific job title or role if you need to find the right person by function
- Check someone's status before sending a message — it tells you if they are available or away
ChatGPT finds Slack users by name and presents their profile clearly — handle, display name, status, and any available contact information. Useful for building a workspace directory or finding the right person to contact.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
How to find and look up slack users with ChatGPT
Once connected (see setup above), use the Slack tool:
- Ask: "Find [name] in our Slack workspace"
- ChatGPT returns the user profile with their handle and status
- Ask: "List all users in the workspace" for a full directory view
- Use the returned details to send messages or manage channels
Example prompt for ChatGPT
Try this with ChatGPT using the Slack tool
Find all users in my Slack workspace with "engineer" in their title and list their names and Slack handles.
Tips for ChatGPT
- Ask ChatGPT to format user results as a contact directory if you need to share them
- List all workspace users to find the right person when you only know their role, not their name
- Ask whether a user is active or deactivated before sending a message to an old account
Copilot finds Slack users without requiring you to leave your development environment — look up a colleague's handle to send a notification, find the workspace admin to ask a question, or generate a list of users for a routing script.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
How to find and look up slack users with Copilot
Once connected (see setup above), use the Slack tool:
- In Copilot Chat: "Find the Slack user for [name]"
- Copilot returns the user profile
- Ask: "Write TypeScript code that finds a user by email and returns their Slack ID"
- Integrate user lookup into your Slack notification logic
Example prompt for Copilot
Try this with Copilot using the Slack tool
Find the Slack user for "alice@company.com" and write a TypeScript function that calls find_user by email and returns the user ID for use in direct message routing.
Tips for Copilot
- Use user lookup to build dynamic routing in your notification system — find the right person by role
- Ask Copilot to write the user lookup alongside the send_message integration in one session
- Fetch the user ID rather than the handle when building programmatic integrations — IDs are more stable
OpenClaw uses user lookup to power intelligent message routing — find the right person by name or role before sending, build dynamic @mention lists for notifications, and maintain an up-to-date workspace directory automatically.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsHow to find and look up slack users with OpenClaw
Once connected (see setup above), use the Slack tool:
- Ask: "Find the Slack user for [name or email]"
- OpenClaw retrieves the user profile
- Use the returned handle in a send_message step
- Build dynamic routing logic that finds the right user before sending
Example prompt for OpenClaw
Try this with OpenClaw using the Slack tool
Find the Slack users for each person in this list and build a direct message routing table with their name, email, and Slack handle: [list of names].
Tips for OpenClaw
- Pair user lookup with send_message to build fully automated direct message workflows
- Use list_users to build a workspace directory and keep it current as the team changes
- Ask OpenClaw to check user status before routing messages — avoid sending to inactive accounts
Frequently Asked Questions
How do I find and look up slack users with an AI assistant?
Look up team members in your Slack workspace to find their username, status, or contact details. Connect the Slack tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask: "Find the Slack user for someone named [name]" Claude searches the workspace and returns the matching user profile
Which AI assistants can find and look up slack users?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all find and look up slack users using the Slack tool through ToolRouter, with no API keys or coding required.
What does the Slack tool do?
Read, send, and search Slack messages across your workspace.
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