jtalk22/slack-mcp-server

v3.2.0 — Reactions, Unreads, User Search

v3.2.0 adds 5 new tools across all three transports: emoji reactions, mark-as-read, unread inbox, and user search. Tool count moves from 11 to 16.

npx -y @jtalk22/slack-mcp@latest --version
npx -y @jtalk22/slack-mcp@latest --doctor

New Tools

| Tool | Purpose |
|------|---------|
| slack_add_reaction | Add emoji reactions to messages |
| slack_remove_reaction | Remove emoji reactions from messages |
| slack_conversations_mark | Mark a conversation as read up to a timestamp |
| slack_conversations_unreads | Priority-sorted unread inbox across all channels and DMs |
| slack_users_search | Search workspace users by name, display name, or email |

What Changed

• 5 new MCP tools — reactions (add/remove), mark-as-read, unread inbox, and user search. Available on all plans including self-hosted.
• REST endpoints — POST /reactions, DELETE /reactions, POST /conversations/:id/mark, GET /conversations/unreads, GET /users/search.
• server-http.js tool parity — Hosted HTTP transport now dispatches all 16 tools (was missing 5 after PRs #30/#31).
• Background timer crash fix — setInterval callback in server.js wrapped in try/catch to prevent unhandled rejection.
• Express route ordering — /users/search registered before /users/:id to prevent "search" matching as user ID.

Who This Affects

• Self-hosted users: upgrade to get 5 new tools. No breaking changes.
• Cloud users: new tools available immediately.
• Hosted HTTP users: critical parity fix — upgrade required to use reaction/unreads/search tools.

Contract Stability

• No MCP tool names were removed or renamed.
• All existing tool schemas unchanged. Fully backwards compatible.
• Diagnostics remain deterministic (--doctor, --status, --version).

Verify Install

npx -y @jtalk22/slack-mcp@latest --version
npx -y @jtalk22/slack-mcp@latest --doctor
npx -y @jtalk22/slack-mcp@latest --status

Support

• Cloud: jtalk22.github.io/slack-mcp-server/cloud.html
• Deployment intake: https://github.com/jtalk22/slack-mcp-server/issues/new?template=deployment-intake.md
• Troubleshooting: https://github.com/jtalk22/slack-mcp-server/blob/main/docs/TROUBLESHOOTING.md

Maintainer/operator: jtalk22 ([email protected])