Semahash

Overview

Semahash is a Model Context Protocol server that implements content-addressed semantics with fail-closed handshakes across 457 cognitive patterns. It exposes these capabilities as tools that MCP clients can invoke, enabling structured agent communication and coordination in multi-agent systems.

The server runs locally on your machine via the uvx semahash command, communicating over stdio with no authentication required. It's built in Python, released as version v0.5.3 under the MIT license, with source code available at emergent-wisdom/sema on GitHub where the project has 13 stars.

Semahash is listed in the AI & Agents category and works with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and others. If you maintain Semahash, claim this listing to verify ownership and keep the information current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "semahash": {
      "command": "uvx",
      "args": [
        "semahash"
      ]
    }
  }
}