MCP Server

Maintained

MIT

MidOS - MCP Community Library MCP Server

io.github.MidOSresearch/midos

Curated knowledge base for AI agents — 19K chunks, 121 skills, semantic search via MCP

What is the MidOS - MCP Community Library MCP server?

The MidOS MCP Community Library is an MCP server that exposes a curated knowledge base of 19K+ chunks, 121 skills, and research patterns to AI agents like Claude and Cursor. It provides semantic search, verified improvements (EUREKA), state-of-the-art benchmarks, and reusable patterns across 16+ technology stacks, with optional vector search via LanceDB.

MidOS gives your AI agent access to a structured, searchable knowledge base covering domains from security ops to software architecture. It includes 119 reusable skills, 383 validated improvements with measured ROI, and 140 state-of-the-art convergence ceilings. Free tier offers 500 queries/month with full content; Pro tier ($10/mo) adds 100K queries and advanced tools.

How to install MidOS - MCP Community Library

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

MIDOS_API_KEY
secret
MidOS API key for authenticated access (optional for community tier)

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "midos": {
      "command": "uvx",
      "args": [
        "midos-mcp"
      ],
      "env": {
        "MIDOS_API_KEY": "<YOUR_MIDOS_API_KEY>"
      }
    }
  }
}

Tools & capabilities

Tools this server exposes to the agent.

Knowledge Search — Search 46K+ curated chunks across all domains with full content (no truncation)
Skills Lookup — Access 119 reusable patterns across 16+ technology stacks
EUREKA Improvements — Browse 383 validated improvements with measured ROI
Truth Patches — Query 50 verified patches and corrections
SOTA Benchmarks — Explore 140 state-of-the-art convergence ceilings
Vector Search — Semantic search via LanceDB + Gemini embeddings (3072-d)

Use cases

Search curated knowledge base to answer architecture and design questions for your AI agent
Access reusable skills and patterns to accelerate development across multiple tech stacks
Retrieve validated improvements (EUREKA) with measured ROI to optimize systems
Query state-of-the-art benchmarks and convergence ceilings for performance tuning
Perform semantic search on 46K+ chunks to find contextually relevant solutions
Integrate verified patches and corrections into your AI agent's decision-making

MidOS - MCP Community Library MCP server FAQ

What is the MidOS MCP server?

MidOS is an MCP server that exposes a curated knowledge base of 19K+ chunks, 121 skills, research patterns, and verified improvements to AI agents. It supports both keyword and semantic search via LanceDB embeddings.

Is MidOS free?

Yes. The Dev tier is free and includes 500 queries/month with full content access. Pro tier costs $10/mo and offers 100K queries/month plus advanced tools (security ops, AOTC, orchestration).

How do I install MidOS in Cursor or Claude?

Install via pip (pip install midos-mcp), set MIDOS_ROOT to your MidOS directory, then run `midos-mcp config --generate cursor` or `--generate claude` to get ready-to-paste JSON config for your client.

Do I need an API key?

No API key is required for the free Dev tier. Pro tier requires a paid API key generated via `midos-mcp keys generate`. Invalid or expired keys silently fall back to Dev tier.

What transport methods does MidOS support?

MidOS supports stdio (default for Claude Code, Cursor, Cline), HTTP (for web clients and remote access), and SSE (legacy clients). Configure via `midos-mcp serve --stdio`, `--http`, or `--sse`.

What are the system requirements?

Python 3.10+, FastMCP 2.x, and a local MidOS knowledge base. The knowledge base is auto-detected or configured via the MIDOS_ROOT environment variable.

README (reference)

Source of truth, from the repository.

midos-mcp

MidOS MCP Community Library — Knowledge, Skills, and Research as MCP tools.

Install once, connect to any AI client.

Install

pip install midos-mcp

Requirement: MidOS knowledge base must be available locally. Set the MIDOS_ROOT environment variable to point to your MidOS installation directory (the one containing knowledge/ and modules/).

export MIDOS_ROOT=/path/to/midos

Quick Start

# Start server (stdio — default for Claude Code, Cursor, etc.)
midos-mcp serve

# Start with HTTP transport
midos-mcp serve --http

# Generate config for your AI client
midos-mcp config --generate claude
midos-mcp config --generate cursor

# Check health
midos-mcp health

Commands

`midos-mcp serve`

Start the MCP server with your preferred transport.

midos-mcp serve              # stdio (default)
midos-mcp serve --http       # Streamable HTTP on 127.0.0.1:8419
midos-mcp serve --sse        # Legacy SSE transport
midos-mcp serve --http --host 0.0.0.0 --port 9000

Flag	Transport	Use Case
`--stdio`	stdio	Claude Code, Cursor, Cline (default)
`--http`	Streamable HTTP	Web clients, remote access
`--sse`	Server-Sent Events	Legacy clients

`midos-mcp config`

Generate ready-to-paste JSON config for any supported MCP client.

midos-mcp config --generate claude    # Claude Desktop / Claude Code
midos-mcp config --generate cursor    # Cursor IDE
midos-mcp config --generate cline     # Cline (VS Code)
midos-mcp config --generate windsurf  # Windsurf IDE
midos-mcp config --generate continue  # Continue.dev
midos-mcp config --generate zed       # Zed Editor
midos-mcp config --generate opencode  # OpenCode
midos-mcp config --generate http      # Generic HTTP client

# Write to file
midos-mcp config --generate claude -o mcp-config.json

`midos-mcp health`

Check server health: knowledge base stats, vector store status, dependencies.

midos-mcp health          # Human-readable output
midos-mcp health --json   # JSON output for scripts

`midos-mcp keys`

Manage API keys for tiered access control.

midos-mcp keys generate --name "my-app" --tier dev
midos-mcp keys list
midos-mcp keys revoke midos_sk_abc

Tiers: dev (free), pro ($10/mo), admin.

Configuration

Environment Variables

Variable	Default	Description
`MIDOS_ROOT`	auto-detect	Path to MidOS installation (required)
`MIDOS_HOST`	`127.0.0.1`	HTTP server bind host
`MIDOS_PORT`	`8419`	HTTP server bind port
`MIDOS_TRANSPORT`	`stdio`	Default transport

Root Detection

The server locates the MidOS knowledge base:

MIDOS_ROOT environment variable (recommended)
Auto-detect: walks up from package location looking for CLAUDE.md + knowledge/
Fallback: current working directory

If you installed via pip, auto-detect won't find the knowledge base. Either:

# Option A: Clone the repo and point to it
git clone https://github.com/MidOSresearch/midos.git
export MIDOS_ROOT=./midos

# Option B: Point to an existing MidOS directory
export MIDOS_ROOT=/path/to/your/midos

Verify with midos-mcp health — it shows the detected root and knowledge counts.

Supported Clients

Client	Config File	Transport
Claude Desktop	`claude_desktop_config.json`	stdio
Claude Code	`.mcp.json`	stdio
Cursor	`.cursor/mcp.json`	stdio
Cline	`cline_mcp_settings.json`	stdio
Windsurf	`~/.codeium/windsurf/mcp_config.json`	stdio
Continue.dev	`~/.continue/config.json`	stdio
Zed	`~/.config/zed/settings.json`	stdio
OpenCode	`opencode.json`	SSE

Optional Dependencies

# Vector store support (LanceDB + embeddings)
pip install midos-mcp[vector]

# Development tools
pip install midos-mcp[dev]

What's Inside

MidOS exposes 68 MCP tools across 2 tiers:

Tier	Tools	Access
Dev	34 tools	Free — no API key needed, full content, 500 queries/month
Pro	68 tools	$10/mo — security ops, AOTC, orchestration, maker write ops

Capabilities

Knowledge — Search 46K+ curated chunks across all domains (full content, no truncation)
Skills — 119 reusable patterns across 16+ technology stacks
EUREKA — 383 validated improvements with measured ROI
Truth — 50 verified patches and corrections
SOTA — 140 state-of-the-art convergence ceilings
Vector Search — Semantic search via LanceDB + Gemini embeddings (3072-d)

Rate Limits

Tier	Queries/month	Content
Dev	500	Full content (no truncation)
Pro	100,000	Full content + AOTC + ops packs

Invalid or expired API keys silently fall back to Dev tier.

Requirements

Python 3.10+
FastMCP 2.x
MidOS knowledge base (local)

License

MIT

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