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Ouroboros

Ouroboros is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Pins an acceptance spec; the verify command and expected output never enter the success contract. It has 6,189 GitHub stars, is released under the MIT license and runs locally with uvx ouroboros-ai.

github.com/Q00/ouroboros (opens in a new tab)

View on GitHub (opens in a new tab)

Install Ouroboros

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "ouroboros": {
      "command": "uvx",
      "args": [
        "ouroboros-ai"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio ouroboros -- uvx ouroboros-ai

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "ouroboros": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "ouroboros-ai"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "ouroboros": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "ouroboros-ai"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Ouroboros

It gets smarter on its own. We just hold the line. Skip the prompt engineering. The agent runs, fails, and gets smarter every generation. The grading command and expected result never make it into the success contract we hand it.

  • ai-agent
  • agent-os
  • llm-orchestration
  • agentic-ai
  • claude-code
  • cli
  • developer-tools
  • mcp
  • ai-coding-agent
  • codex

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FAQ

Ouroboros FAQ

Still curious? Email info@appsgit.com.

What is Ouroboros?

Ouroboros is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Pins an acceptance spec; the verify command and expected output never enter the success contract. It has 6,189 GitHub stars, is released under the MIT license and runs locally with uvx ouroboros-ai. The source code is at github.com/Q00/ouroboros.

How do I install the Ouroboros MCP server?

Add the command uvx ouroboros-ai to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Ouroboros free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is Ouroboros actively maintained?

The most recent commit was on Oct 6, 2026. The latest release is v0.55.6, published Oct 6, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.