Comparison

io.github.chrischall/microsoft-teams-mcp vs Slack

io.github.chrischall/microsoft-teams-mcp is an MCP server published by chrischall. Marketplaces we read that list it: 2 (Official MCP Registry, npm registry (MCP servers)). Slack is an MCP server published by mindstone. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-27. 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

Where each is published
Marketplace	io.github.chrischall/microsoft-teams-mcp	Slack
Official MCP Registry	Listed Version: 0.7.0 Downloads/month (npm): 2 769 Downloads/week (npm): 497 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen 2026-10-11	Listed Version: 0.3.0 Downloads/month (npm): 3 929 Downloads/week (npm): 520 Forks (GitHub): 4 Stars (GitHub): 13 Not marked · First seen 2026-10-11
npm registry (MCP servers)	Listed Version: 0.7.0 Downloads/month (npm): 2 769 Downloads/week (npm): 497 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen 2026-10-12	Not listed

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

io.github.chrischall/microsoft-teams-mcp vs Slack
Fact	io.github.chrischall/microsoft-teams-mcp	Slack
Marketplaces that list it (differs)	2 (better)	1 (worse)
Stars (GitHub) (differs)	0 (worse)	13 (better)
Forks (GitHub) (differs)	0 (worse)	4 (better)
Last release (differs)	2026-10-20	Not published
Where it runs (differs)	On your machine (@chrischall/microsoft-teams-mcp)	On your machine (@mindstone/mcp-server-slack)
Transport	stdio	stdio
Tools it declares	Not published	Not published
Environment variables it asks for (differs)	18, secrets among them: 2	8, secrets among them: 1
Licence (differs)	MIT	Not stated
Repository (differs)	github.com/chrischall/microsoft-teams-mcp	github.com/mindstone/mcp-servers
Changes in the last 7 days (differs)	3	0
First seen	2026-10-11	2026-10-11

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

io.github.chrischall/microsoft-teams-mcp

In its own words, on Official MCP Registry:

Microsoft Teams for Claude — read any chat or channel and its unread messages; send and react

Slack

In its own words, on Official MCP Registry:

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

How to run each

io.github.chrischall/microsoft-teams-mcp As a local MCP server: npm package

Claude Code

claude mcp add --env "MCP_CONFIRM_SECRET=<YOUR_MCP_CONFIRM_SECRET>" --env "TEAMS_ACCESS_TOKEN=<YOUR_TEAMS_ACCESS_TOKEN>" --transport stdio microsoft-teams-mcp -- npx -y @chrischall/microsoft-teams-mcp

Requires: MCP_CONFIRM_SECRET (secret), TEAMS_ACCESS_TOKEN (secret)

Slack As a local MCP server: npm package

Claude Code

claude mcp add --env "SLACK_CLIENT_SECRET=<YOUR_SLACK_CLIENT_SECRET>" --env "SLACK_CONFIG_PATH=<YOUR_SLACK_CONFIG_PATH>" --env "SLACK_TEAM_ID=<YOUR_SLACK_TEAM_ID>" --transport stdio mcp-server-slack -- npx -y @mindstone/mcp-server-slack

Requires: SLACK_CLIENT_SECRET (secret), SLACK_CONFIG_PATH, SLACK_TEAM_ID

Commands built only from what the marketplaces declare; the full set for every client is on each card.

Tools each declares

Neither one's marketplaces publish a list of tools, so there is nothing to compare.

Settings each asks for

Only io.github.chrischall/microsoft-teams-mcp asks for

FETCHPROXY_IDENTITY_DIR
FETCHPROXY_WS_HOST
MCP_CONFIRM_ELICITATION
MCP_CONFIRM_MODE
MCP_CONFIRM_SECRET (secret)
MCP_CONFIRM_TTL_SECONDS
TEAMS_ACCESS_TOKEN (secret)
TEAMS_CAPTURE_TIMEOUT
TEAMS_CHATSVC_BASE
TEAMS_CHATSVC_REGION
TEAMS_DISABLE_FETCHPROXY
TEAMS_OUTPUT_DIR

Show the remaining 6

TEAMS_SHAREPOINT_TOKEN_FILE
TEAMS_SUBSTRATE_TOKEN_FILE
TEAMS_TIME_ZONE
TEAMS_TOKEN_CACHE
TEAMS_TOKEN_FILE
TEAMS_WS_PORT

Only Slack asks for

MCP_WORKSPACE_PATH
SLACK_CLIENT_ID
SLACK_CLIENT_SECRET (secret)
SLACK_CONFIG_PATH
SLACK_DISABLE_REFRESH
SLACK_MAX_RETRIES
SLACK_REQUEST_TIMEOUT_MS
SLACK_TEAM_ID

Settings as each marketplace publishes them. Asking for fewer is not better in itself.

What it can do: io.github.chrischall/microsoft-teams-mcp · What it can do: Slack · Compare two other plugins

Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the public npm registry (registry.npmjs.org). 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 2026-10-27. We publish no contact details for plugin publishers.