20minds MCP

20minds helps teams turn complex questions into clear, testable work. Its MCP server lets compatible AI tools use 20minds Decide to frame decisions, investigate theses, triage uncertainty, and compare options.

Plugin and MCP server

A plugin adds a complete integration to an AI client. The 20minds plugin includes the MCP connection plus the decide and research skills, which guide the client on when and how to use 20minds.

An MCP server provides tools that an AI client can call. The 20minds MCP server is available at:

https://20minds.ai/mcp

Use the plugin when your client supports it. Use the manual MCP setup when you only need the server connection or your client does not support plugins.

Claude Code

Recommended: install the plugin

In Claude Code, add the 20minds marketplace and install the plugin:

/plugin marketplace add 20minds/agent-plugins
/plugin install 20minds@20minds

Then authenticate the MCP connection:

claude mcp login 20minds

Manual MCP setup

To connect only the MCP server, run:

claude mcp add 20minds --transport http https://20minds.ai/mcp --scope user
claude mcp login 20minds

Manual setup gives Claude Code the 20minds MCP tools, but it does not install the plugin skills.

Claude Desktop

Recommended: install the plugin

Open Claude Desktop, go to Settings, open Plugins, choose Add marketplace, and enter:

https://github.com/20minds/agent-plugins

Install the 20minds plugin from the marketplace.

Manual MCP setup

Open Claude Desktop’s configuration file and add the 20minds server under mcpServers:

{
  "mcpServers": {
    "20minds": {
      "command": "npx",
      "args": ["mcp-remote", "https://20minds.ai/mcp"]
    }
  }
}

Restart Claude Desktop after saving the file. Manual setup gives Claude Desktop the MCP tools, but it does not install the plugin skills.

Codex

Recommended: install the plugin

In Codex, open Settings, select Plugins, choose Add marketplace, and enter:

https://github.com/20minds/agent-plugins

Select the marketplace and install the 20minds plugin.

You can also use the Codex CLI:

codex plugin marketplace add 20minds/agent-plugins

Then open /plugins, choose the 20minds marketplace, and install 20minds.

Manual MCP setup

In Codex, open Settings, select MCP Servers, choose Add custom MCP server, select Streamable HTTP, and use:

https://20minds.ai/mcp

Manual setup connects the MCP server, but it does not install the plugin skills.

OpenCode

Add the server to opencode.json:

{
  "mcp": {
    "20minds": {
      "type": "remote",
      "url": "https://20minds.ai/mcp",
      "enabled": true
    }
  }
}

Check the connection with:

opencode mcp list

Verify the connection

Start a new conversation after installation or configuration and ask your AI client to use 20minds Decide for a real question. A successful connection should expose tools for creating and working with a decision workspace.

If the tools do not appear, restart the client and start a new conversation. For plugin installations, confirm that the 20minds plugin is enabled. For manual setups, check that the server URL is exactly https://20minds.ai/mcp.

What to try first

Ask 20minds to help you:

frame a decision with a clear question and decision criteria
investigate a thesis and identify supporting or conflicting evidence
triage uncertainty and separate knowns, unknowns, and assumptions
compare options and identify the next testable step

The best results come from giving 20minds a concrete question, the relevant context, and any constraints that should shape the decision.