What is the key difference between One Brain and Heirmos?

One Brain belongs to the Knowledge & Memory category with local stdio execution, while Heirmos belongs to the Knowledge & Memory category with cloud HTTP/SSE execution.

How do I install One Brain or Heirmos in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are One Brain and Heirmos free or paid?

One Brain operates under a Free / Open Source model (No auth required). Heirmos operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

One Brain lists 0 tools with 0 views and 0 GitHub stars. Heirmos lists 0 tools with 0 views and 0 GitHub stars.

Can I use both One Brain and Heirmos together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

How do I install One Brain or Heirmos in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are One Brain and Heirmos free to use, or do they require API keys?

One Brain is listed under a Free / Open Source model with No auth required . Heirmos operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both One Brain and Heirmos at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both one-brain and heirmos as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, One Brain has a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. Heirmos holds a Quality Score of 29 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

One Brain vs Heirmos

In-depth architectural comparison of the One Brain and Heirmos MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

One Brain

Knowledge & Memory · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

Heirmos

Knowledge & Memory · Remote HTTP/SSE

Quality: 29/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose One Brain if you need specialized Knowledge & Memory tools running via a local process. Choose Heirmos if your workspace requires Knowledge & Memory integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose One Brain when:

You need dedicated capabilities in the Knowledge & Memory domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore One Brain Details

Choose Heirmos when:

You need dedicated capabilities in the Knowledge & Memory domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Heirmos Details

Feature & Specification Comparison

Specification	O One Brain Knowledge & Memory	H Heirmos Knowledge & Memory
Summary	Shared memory for a team in Claude Code: what one person records, everyone has.	Persistent memory shared across Claude, ChatGPT, Grok and other MCP clients.
Category & Scope	Knowledge & Memory	Knowledge & Memory
Quality signal

Tools & Capabilities Breakdown

One Brain Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Heirmos Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

One Brain Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "one-brain": {
      "command": "npx",
      "args": [
        "-y",
        "one-brain"
      ]
    }
  }
}

Heirmos Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "heirmos": {
      "url": "https://heirmos.com"
    }
  }
}

Frequently Asked Questions

One Brain is categorized under Knowledge & Memory and uses a local stdio subprocess. In contrast, Heirmos belongs to Knowledge & Memory using remote streaming HTTP/SSE transport. Select One Brain when you need capabilities focused on knowledge & memory and Heirmos when you require tools for knowledge & memory.

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