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io.github.0xmortuex/mort-mcp

Official registry Developer tools

Write, type-check and run Mort code, with language spec and stdlib lookup.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package mort-mcp
Claude Code 
claude mcp add mort-mcp -e 'MORT_HOME=<MORT_HOME>' -- uvx mort-mcp==0.1.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mort-mcp": {
            "command": "uvx",
            "args": [
                "mort-mcp==0.1.0"
            ],
            "env": {
                "MORT_HOME": "<MORT_HOME>"
            }
        }
    }
}

Environment variables

  • MORT_HOME Path to a checkout of github.com/0xmortuex/Mort (enables docs and examples)

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. mort-mcp
  2. Install
  3. Tools
  4. Tests
  5. License

mort-mcp

Let an AI agent write a language it has never seen.

Mort is a statically typed systems language that compiles to C. It's the language MORT OS is written in. No model has Mort in its training data, so an agent asked to write it will guess Rust-like syntax and get it wrong.

mort-mcp gives the agent what a human newcomer would use: a fast type checker with precise errors, a way to run programs, the language spec to search, and the exact signatures of the standard library.

> mort_check
FAILED:
error: <source>:4:1: argument 1 of 'strings.starts_with' expects []const u8, got *u8
        if strings.starts_with("mortos", "mort") {

> mort_std strings
// First byte offset of `needle` in `text`, or None if it does not occur.
pub fn index_of(text: []const u8, needle: []const u8) -> Option<u64>;
...

> mort_run
[exit 0]
1

Install

You need the Mort compiler. The simplest setup is a checkout, which also brings the docs and examples:

git clone https://github.com/0xmortuex/Mort
pip install mort-mcp ziglang     # ziglang = zero-install C backend for mort_run
claude mcp add mort --env MORT_HOME=/path/to/Mort -- mort-mcp

Without MORT_HOME, mort-mcp uses a mortc on your PATH (pip install git+https://github.com/0xmortuex/Mort). Checking, running and std lookup all work that way. mort_docs and mort_examples need the checkout.

Tools

ToolWhat it does
mort_checkType-check source text or files without building. Fast, and needs no C compiler. Returns diagnostics as file:line:col with the source line.
mort_runCompile and run, with stdin, args and a timeout. Reports output and exit code.
mort_emit_cShow the generated C. freestanding=True shows the kernel-mode output.
mort_formatFormat with the official formatter (mortc fmt).
mort_stdList std modules, or show one module's public API: exact signatures, struct fields and doc comments.
mort_docsSearch the language specification and reference docs, e.g. "resource struct cleanup" or "integer overflow".
mort_examplesList or read the compiler's example programs.
mort_versionCompiler and language version, and where the compiler was found.

Every tool calls mortc through its command-line interface, and reads std signatures and docs from the installed compiler. Answers therefore match the version you're running, even as the language changes.

Tests

pip install ".[test]" "ruff==0.16.0" "mypy==2.3.0" ziglang
ruff check src tests && mypy --strict src
MORT_HOME=/path/to/Mort pytest tests

Without MORT_HOME, only the unit tests and the MCP handshake test run. CI checks out the latest Mort and also runs every night, so a change to the compiler's CLI or docs layout shows up as a failing build.

License

MIT

Frequently asked questions

What is io.github.0xmortuex/mort-mcp?

Write, type-check and run Mort code, with language spec and stdlib lookup.

How do I install io.github.0xmortuex/mort-mcp?

It runs on your machine. In Claude Code: claude mcp add mort-mcp -e 'MORT_HOME=<MORT_HOME>' -- uvx mort-mcp==0.1.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.0xmortuex/mort-mcp need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.0xmortuex/mort-mcp open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.0xmortuex/mort-mcp?

It is published by 0xmortuex. AI.tn lists it but does not maintain or endorse it.

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