Slackbot MCP client

Does your MCP server work in Slackbot?

Slack's AI assistant, inside the workspace. Slackbot renders MCP apps, and handles tool results its own way. Our catalog records the details below. Test your server against it with MCPJam.

Test against Slackbot View Slackbot capabilities

Terminal

npx @mcpjam/inspector@latest

What Slackbot supports

MCP apps

Slackbot renders MCP apps, placing tool-result media none.

Tool-result images

The model doesn't see images returned by MCP tools in Slackbot, in any result shape we track.

Display

Runs inline by default; supports inline and fullscreen on web.

MCP extensions

Advertises io.modelcontextprotocol/ui.

Emulation model

MCPJam emulates Slackbot using openai/gpt-5-nano, so tests reflect how this host actually drives your tools.

How we know

Probed: Verified by running against the client. Last reviewed 2026-07-08.

Test your server against Slackbot

Test an MCP app in Slackbot

Walkthrough for test an MCP app's UI in Slackbot.

Test MCP tools in Slackbot

Walkthrough for test MCP tools and their results in Slackbot.

Connect a server to Slackbot

Walkthrough for connect an MCP server to Slackbot and verify it.

Slackbot capability questions

Does Slackbot support sampling?

Live support matrix for MCP sampling, per client.

Does Slackbot support elicitation?

Live support matrix for MCP elicitation, per client.

Does Slackbot support roots?

Live support matrix for MCP roots, per client.

Compare MCP host capabilities side by side

The full Can I Use matrix on caniuse.dev.

How to test your MCP server against Slackbot

Run npx @mcpjam/inspector@latest, connect the server config you already use, and select Slackbot. MCPJam drives your server the way this host does, including its model (openai/gpt-5-nano), so you see the tool calls it actually makes instead of guessing from a bug report.

From there, Trace shows every step from prompt to response, the OAuth Debugger shows where authorization breaks, and Evals score whether the model picks the right tool across realistic requests. All of it runs locally, free and open source.

Frequently asked questions

Yes. Our catalog records Slackbot as rendering MCP apps, with tool-result media placed none. (Probed, last reviewed 2026-07-08.)

The model doesn't see images returned by MCP tools in Slackbot, in any result shape we track.

Run npx @mcpjam/inspector@latest, connect your server, and select Slackbot. MCPJam emulates the host with openai/gpt-5-nano so you can watch the real tool calls, trace them, and score them with evals.

It comes from MCPJam's host-compat catalog (the same data behind caniuse.dev), recorded as "probed" and last reviewed 2026-07-08. Verified by running against the client.