How to Send Slack Messages with Claude
Send Slack messages with Claude and ToolRouter. Post updates and summaries to channels from your conversation.
Tool
Claude composes and sends Slack messages based on your conversation — summarise a research session and post it to a channel, send an update after completing a task, or draft and deliver a status message without you having to switch to Slack to type it manually.
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
Steps
Once connected (see setup above), use the Slack tool:
- Ask: "Send a message to #updates with this summary: [describe what to send]"
- Claude composes the message and posts it to the specified channel
- Ask: "Also send it to [specific user] as a direct message"
- Confirm the message was sent successfully
Example Prompt
Try this with Claude using the Slack tool
Summarise the key findings from our conversation about the competitor analysis and send it to the #strategy channel with a header and three bullet points.
Tips
- Ask Claude to format the message with Slack markdown — bold headings, bullet points, and code blocks
- Specify the channel name exactly as it appears in Slack, including the # symbol
- Ask Claude to write the message for a specific audience — the whole company vs a technical team