Slack vs Discord MCP
Slack MCP and Discord MCP both let an agent participate in a chat platform — read history, search messages, and post — but they target different communities and connect in different ways. The Slack server (a maintained community project) leans on a user token (SLACK_MCP_XOXP_TOKEN) so it can read channel and DM history, search messages, and post without requiring a workspace bot install, which suits agents acting on behalf of a person in a work Slack. The Discord server (a maintained community project) drives a Discord bot via a bot token, so beyond messages it can manage channels, categories, forum posts, roles, permissions, and webhooks across a server. Both run locally over stdio and are community-maintained rather than vendor-official. The real difference is workplace messaging versus community-server administration. Here is a balanced look at how they differ on audience, scope, and the kind of chat work each suits best.
How they compare
| Dimension | Slack | Discord MCP |
|---|---|---|
| Audience | Workplace messaging: built for a team's Slack workspace, channels, and DMs. | Community servers: built for Discord guilds, with forums, roles, and member management. |
| Auth model | User token (xoxp) acting as a person, so it can read history and search without installing a workspace bot. | Bot token: the agent operates as a Discord bot with whatever permissions that bot is granted. |
| Scope of actions | Messaging-centric: history, replies, search, reactions, marking read, and channel/usergroup management. | Broad server administration: send and read messages plus create/edit channels, categories, forum posts, roles, permissions, and webhooks. |
| Maintenance | Community-maintained server (korotovsky) run locally over stdio, not an official Slack product. | Community-maintained server (barryyip0625) run locally over stdio, not an official Discord product. |
| Best-fit task | Letting an agent triage, search, and respond across a work Slack as the signed-in user. | Letting an agent run a Discord community: post, moderate, manage roles and channels, and handle forum threads. |
Verdict
Pick by where your conversations happen and what you need the agent to do. Reach for the Slack MCP server when the target is a workplace Slack and you want an agent to read history, search, and respond as the signed-in user — its user-token approach means no workspace bot install, which is convenient for personal-assistant style automation. Reach for the Discord MCP server when you run a community on Discord and want broad bot-driven administration: managing channels, categories, roles, permissions, forums, and webhooks alongside messaging. Both are community-maintained and run locally, so weigh that against your trust and operational needs. In short: Slack for work-team messaging on behalf of a user; Discord for community-server messaging plus full administration.
FAQ
- Are either of these official servers?
- No. Both are maintained community projects, not vendor-official servers — the Slack server by korotovsky and the Discord server by barryyip0625. Both run locally over stdio.
- Why does the Slack server avoid a bot install?
- It authenticates with a user token (SLACK_MCP_XOXP_TOKEN), so the agent acts as the signed-in person and can read history and search without an admin installing a workspace bot. The Discord server, by contrast, runs as a bot via a bot token.