Slack vs macOS-only MCP server that exposes iMessage chat
Slack is a plugin bundle for AI coding tools published by Salesforce. Marketplaces we read that list it: 1 (Claude: knowledge-work-plugins). macOS-only MCP server that exposes iMessage chat is an MCP server published by adelaidasofia. Marketplaces we read that list it: 2 (Official MCP Registry, Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-24. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Slack |  macOS-only MCP server that exposes iMessage chat |
|---|---|---|
| Claude: knowledge-work-plugins | Listed Version: 1.0.0 Forks (GitHub): 3 583 Stars (GitHub): 32 412 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.1.0 Forks (GitHub): 2 Stars (GitHub): 2 Not marked · First seen |
| Claude Code: claude-plugins-community | Not listed | Listed Version: 0.1.0 Forks (GitHub): 2 Stars (GitHub): 2 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Slack | macOS-only MCP server that exposes iMessage chat |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 32 412 (better) | 2 (worse) |
| Forks (GitHub) (differs) | 3 583 (better) | 2 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Remote server (mcp.slack.com/mcp) | On your machine (https://github.com/adelaidasofia/imessage-mcp/releases/download/v0.1.0/imessage-mcp.mcpb) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | Not published | 1 |
| Parts of the bundle (differs) | 8 | 2 |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/anthropics/knowledge-work-plugins | github.com/adelaidasofia/imessage-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 2 days ago, requires a key | no remote endpoint we check |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Slack
Slack integration for searching messages, sending communications, managing canvases, and more
macOS-only MCP server that exposes iMessage chat
macOS-only MCP server that exposes iMessage chat.db to Claude and exports per-chat history to an…
How to run each
Slack As a Claude Code plugin
/plugin marketplace add anthropics/knowledge-work-plugins
/plugin install slack-by-salesforce@knowledge-work-pluginsmacOS-only MCP server that exposes iMessage chat As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install imessage-mcp@claude-communityCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Slack has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Slack · What it can do: macOS-only MCP server that exposes iMessage chat · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/knowledge-work-plugins/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.