# ARC-1 (MCP server)

> ARC-1 is an MCP server that adds tools to AI assistants such as Claude Desktop, Claude Code and Cursor. MCP server for SAP ABAP systems. It has 212 GitHub stars, is released under the MIT license and runs locally with npx -y arc-1.

ARC-1 (pronounced arc one [ɑːrk wʌn]) — Enterprise-ready MCP server for SAP ABAP systems. Secure by default, deployable to BTP or on-premise, and hardened with large unit/integration/E2E test coverage.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/arc-mcp/arc-1 |
| GitHub stars | 212 |
| License | MIT |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: arc-1; docker: ghcr.io/arc-mcp/arc-1:1.5.1 |
| Remote URL | none |
| Needs API key | yes |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Other |
| Latest release | v1.5.1 (Oct 4, 2026) |
| Last commit | Oct 4, 2026 |
| MCP registry name | io.github.arc-mcp/arc-1 |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "arc-1": {
      "command": "npx",
      "args": [
        "-y",
        "arc-1"
      ],
      "env": {
        "SAP_URL": "your-value",
        "SAP_USER": "your-value",
        "SAP_PASSWORD": "your-value"
      }
    }
  }
}
```

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

### Claude Code

```sh
claude mcp add --env SAP_URL=your-value --env SAP_USER=your-value --env SAP_PASSWORD=your-value --transport stdio arc-1 -- npx -y arc-1
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "arc-1": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "arc-1"
      ],
      "env": {
        "SAP_URL": "your-value",
        "SAP_USER": "your-value",
        "SAP_PASSWORD": "your-value"
      }
    }
  }
}
```

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

### VS Code (.vscode/mcp.json)

```json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "sap_password",
      "description": "SAP_PASSWORD",
      "password": true
    }
  ],
  "servers": {
    "arc-1": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "arc-1"
      ],
      "env": {
        "SAP_URL": "your-value",
        "SAP_USER": "your-value",
        "SAP_PASSWORD": "${input:sap_password}"
      }
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

## Environment variables

- `SAP_URL` (required): SAP system URL (e.g., http://host:50000)
- `SAP_USER` (required): SAP username
- `SAP_PASSWORD` (secret) (required): SAP password
- `SAP_CLIENT`: SAP client number
- `SAP_LANGUAGE`: SAP logon language
- `SAP_INSECURE`: Skip TLS certificate verification
- `SAP_ALLOW_WRITES`: Allow ABAP object mutations (safe default: false)

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---

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