xmp4 — Semantic code knowledge for your stack

OSS libs in your stack, really used: source, tests, callers.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    OSS libs in your stack, really used: source, tests, callers. C#, Java, TS, Python, Rust, PHP+.

    How to connect

    How to connect xmp4 — Semantic code knowledge for your stack to Claude

    The server address to paste into Claude settings:

    https://mcp.example4.ai/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect xmp4 — Semantic code knowledge for your stack to ChatGPT

    The server address to paste into ChatGPT settings:

    https://mcp.example4.ai/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect xmp4 — Semantic code knowledge for your stack to Cursor

    The server address to paste into Cursor settings:

    https://mcp.example4.ai/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (16)

    Raw names from tools/list. Only developers need these.

    xmp4_calleesFind direct callees (methods called by) a symbol in a project. Navigate step-by-step by calling xmp4_callees again on interesting results.
    xmp4_callersFind direct callers of a symbol in a project. Navigate step-by-step by calling xmp4_callers again on interesting results.
    xmp4_depsList external dependencies of a project.
    xmp4_grepServer-side regex text search over indexed project source files. Free tier: requires file_path (single file). Premium tier (XMP4_PREMIUM_GREP_WALK=true): allows file_glob multi-file walk. Prefer xmp4_tests_for/xmp4_usages for SCIP symbols — grep is for text not indexed (comments, literals, config keys).
    xmp4_guideUsage guide for xmp4 tools — read this first to learn the correct workflow
    xmp4_hierarchyGet type hierarchy (base, interfaces, derived) for a symbol in a project.
    xmp4_infoGet detailed information about a symbol in a project.
    xmp4_outlineGet outline (all symbols) for a file in a project.
    xmp4_projectsSearch and browse projects by language and name. Use this first to discover projects, then use other tools with the repo name.
    xmp4_searchSearch symbols in a project. Use xmp4_projects first to find the project identifier.
    xmp4_serverGet server information, version, and capabilities
    xmp4_sourceExtract source code for a symbol in a project.
    xmp4_symbol_atLSP-style position→symbol lookup. Given (file_path, line, column) returns the symbol whose occurrence covers that cursor position. line is 1-based; column is 0-based. Use after xmp4_outline/xmp4_view when you know coordinates and want the canonical symbol.
    xmp4_tests_forFind direct tests that exercise a given symbol (direct callers filtered to test-file candidates per language pattern: CSharp/Java/PHP: *Test(s).<ext>; Python: test_*.py / *_test.py; TypeScript/JavaScript: *.spec/test.{ts,js}; Rust: *_tests.rs / tests/; etc.).
    xmp4_usagesFind all usages/references of a symbol in a project.
    xmp4_viewRead a raw file excerpt from an indexed project by line range. Use after xmp4_search/xmp4_outline locates the region of interest, or to expand a truncated xmp4_source snippet. Hard cap of 500 lines per call.