xmp4 MCP MCP server

An official MCP server by 0ics srl that provides AI agents with compiler-grade intelligence over 900+ pre-indexed open-source libraries. It enables agents to navigate source code, resolve type information, view call hierarchies, and find tests for OSS projects without needing local installation or API keys.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by 0ics srl

MCP endpoint (Streamable HTTP)

https://mcp.example4.ai/mcp

Vendor documentation

What you can do with it

Navigate source code and call hierarchies for 900+ OSS libraries
Resolve type information and find callers for specific methods
Locate real test files for library APIs
Understand library implementation details to support AI coding agents

Tools advertised by the last live check:

xmp4_callees
xmp4_callers
xmp4_deps
xmp4_grep
xmp4_guide
xmp4_hierarchy
xmp4_info
xmp4_outline
xmp4_projects
xmp4_search
xmp4_server
xmp4_source
xmp4_symbol_at
xmp4_tests_for
xmp4_usages
xmp4_view

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http xmp4-mcp https://mcp.example4.ai/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add xmp4-mcp --url https://mcp.example4.ai/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable xmp4-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "xmp4-mcp": {
      "url": "https://mcp.example4.ai/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "xmp4-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.example4.ai/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start xmp4-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "xmp4-mcp": {
      "type": "http",
      "url": "https://mcp.example4.ai/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http xmp4-mcp https://mcp.example4.ai/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "xmp4-mcp": {
      "url": "https://mcp.example4.ai/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "xmp4-mcp": {
      "serverUrl": "https://mcp.example4.ai/mcp"
    }
  }
}

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