# UN Charter 1945

This MCP server exposes the amended 1945 UN Charter as an executable model with worked cases. Use it to examine questions through an AI coding agent.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: arxohq
- License: Apache-2.0 · policy=link-only · description only; the file stays with the author
- Source: https://github.com/arxohq/arxo-charter-1945
- Updated: 2026-10-14
- HTML: https://affpapa.org/en/nevibecode/mcp/un-charter-1945

## What it does

The server gives an agent access to the amended 1945 UN Charter, source material and cases that test how the model applies. The repository contains `doctrine.iura_humana` and `un.charter`; the latter ships with 169 scenarios. Cases can be queried from their directory with `law ask .`, with no download step.

Builds use `package.py`, saved evaluation replays and a rebuild from the release. Dependency bytes live under `packages/<name>/deps/` and are checked against the `contentHash` in `law.lock`; the build and CI run offline. The server is not affiliated with the UN, so its output should not be presented as an official organizational position.

## Requirements
- Needs: Node.js (commands run via npx)
- Remote server: `https://mcp.arxo.io/mcp/charter`

## Install

### Claude Code (native platform)

1. **Platform CLI: remote server**
```bash
claude mcp add --transport http charter https://mcp.arxo.io/mcp/charter
```

2. **Platform CLI**
```bash
claude mcp add un-charter-1945 -- npx -y @arxo/mcp-charter
```

### Codex

1. **Platform CLI: remote server**
```bash
codex mcp add un-charter-1945 --url https://mcp.arxo.io/mcp/charter
```

2. **Platform CLI**
```bash
codex mcp add un-charter-1945 -- npx -y @arxo/mcp-charter
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "un-charter-1945": {
            "url": "https://mcp.arxo.io/mcp/charter"
        }
    }
}
```
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "un-charter-1945": {
            "command": "npx",
            "args": [
                "-y",
                "@arxo/mcp-charter"
            ]
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "un-charter-1945": {
            "type": "http",
            "url": "https://mcp.arxo.io/mcp/charter"
        }
    }
}
```
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "un-charter-1945": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "@arxo/mcp-charter"
            ]
        }
    }
}
```

### Gemini CLI

1. **Platform CLI: remote server**
```bash
gemini mcp add -t http un-charter-1945 https://mcp.arxo.io/mcp/charter
```

2. **Platform CLI**
```bash
gemini mcp add un-charter-1945 npx -y @arxo/mcp-charter
```

## When to use it
- analyze a question against the UN Charter
- test a rule against a worked case
- compare case facts with the `un.charter` model
- query an example under `packages/un.charter/examples`

## Example prompts
- Analyze this question using the amended UN Charter model and explain which provisions apply.
- Review the case in `packages/un.charter/examples/amendment` and show how the answer follows.
- Compare these facts with the scenarios in `packages/un.charter/examples/article-51-silence`.

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