MCP Server Config Generator – JSON Builder

Server Configuration

Server Key (e.g., local_postgres)

Command (e.g., npx, node, python3)

Arguments (Comma-separated)

Example: -y, @modelcontextprotocol/server, arg3

Generated JSON

Claude Desktop Configuration Builder

The MCP Server Config Generator is a privacy-first, client-side utility designed to help AI engineers and developers safely construct their claude_desktop_config.json files without syntax errors.

Why use a generator?

Prevent Silent Failures: Claude Desktop will silently ignore malformed JSON configuration files. This generator guarantees valid JSON structure.
Array Formatting: Command-line arguments in MCP require strict array formatting. The tool automatically handles string splitting and quotes.
Privacy First: Because MCP configs often contain absolute file paths to proprietary codebases or local database connection strings, this tool runs entirely locally in your browser.

How to integrate with Claude Desktop

Once you have generated your configuration block, click "Copy to Clipboard". Navigate to your Claude Desktop application support directory (~/Library/Application Support/Claude/ on Mac) and paste the contents into claude_desktop_config.json. Restart Claude Desktop for the changes to take effect.

For a complete walkthrough, read our guide on How to Integrate MCP Servers with Claude Desktop.

Frequently Asked Questions

Common questions about this tool.

Where do I put this generated JSON config? ▼

On macOS, save it to ~/Library/Application Support/Claude/claude_desktop_config.json. On Windows, save it to %APPDATA%\Claude\claude_desktop_config.json.

How do I add multiple MCP servers? ▼

Simply click the "Add Server" button to add another MCP server block to the configuration. The generated JSON will automatically format them correctly under the mcpServers object.

Is my configuration data stored anywhere? ▼

No. This generator runs 100% client-side in your browser. Your server configurations, absolute paths, and environment variables (like API keys) are never sent to any server.