# GSA CALC+ (MCP server)

> GSA CALC+ is an MCP server that adds tools to AI assistants such as Claude Desktop, Claude Code and Cursor. GSA CALC+ awarded labor ceiling rates from more than 230,000 MAS contract records. It has 27 GitHub stars, is released under the MIT license and runs locally with uvx gsa-calc-mcp.

Free, open-source MCP server for the GSA CALC+ Labor Ceiling Rates API. Query awarded GSA MAS schedule hourly rates for IGCE development, price reasonableness analysis, and market research.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/1102tools-dev/federal-contracting-mcps |
| GitHub stars | 27 |
| License | MIT |
| Language | Python |
| Transport | stdio, streamable-http |
| Packages | pypi: gsa-calc-mcp |
| Remote URL | https://gsa-calc.1102tools.com/mcp |
| Needs API key | no |
| Official | yes |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code, Claude.ai, ChatGPT |
| Category | Other |
| Latest release | v1.0.34 (Oct 21, 2026) |
| Last commit | Oct 25, 2026 |
| MCP registry name | com.1102tools/gsa-calc-mcp |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "gsa-calc": {
      "command": "uvx",
      "args": [
        "gsa-calc-mcp"
      ]
    }
  }
}
```

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

### Claude Code

```sh
claude mcp add --transport stdio gsa-calc -- uvx gsa-calc-mcp
```

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

```json
{
  "mcpServers": {
    "gsa-calc": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "gsa-calc-mcp"
      ]
    }
  }
}
```

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

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

```json
{
  "servers": {
    "gsa-calc": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "gsa-calc-mcp"
      ]
    }
  }
}
```

### Claude Code (remote)

```sh
claude mcp add --transport http gsa-calc "https://gsa-calc.1102tools.com/mcp"
```

The same server is also hosted as a remote MCP endpoint, so nothing runs on your machine.

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

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