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AI Protocol (MCP)

The Model Context Protocol (MCP) is a standardized protocol that lets AI assistants and agents use external tools. Leapter exposes your published Blueprints as MCP tools, so any MCP-compatible AI client can call your logic directly.

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Get the endpoint URL

  1. Open your Blueprint in the editor.
  2. Click the Share button in the toolbar.
  3. Select Connect.
  4. In the Connect dialog, select the AI Protocol (MCP) tab.
The Connect dialog showing the AI Protocol (MCP) tab with endpoint URLs The dialog shows two endpoint URLs:

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Standard Endpoint

https://lab.leapter.com/runtime/api/v1/{appspace}/{project-id}/mcp
Use this for most MCP clients. It uses the standard MCP transport protocol.

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SSE Streaming Endpoint

https://lab.leapter.com/runtime/api/v1/{appspace}/{project-id}/mcp/sse
Use this for clients that require Server-Sent Events (SSE) streaming, such as some older MCP integrations. Click the Copy button next to either URL to copy it to your clipboard.

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Authentication

All MCP connections require an API key. Pass it as a header:
  • Header name: X-API-Key
  • Header value: your API key
See API Keys to create and manage your keys.

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Connect with Claude Desktop

  1. Copy the Standard Endpoint URL from the Connect dialog.
  2. Open Claude Desktop and go to Settings → Developer → Edit Config.
  3. Add an MCP server entry in your claude_desktop_config.json:
{
  "mcpServers": {
    "leapter": {
      "url": "https://lab.leapter.com/runtime/api/v1/{appspace}/{project-id}/mcp",
      "headers": {
        "X-API-Key": "your-api-key"
      }
    }
  }
}
  1. Replace {appspace}, {project-id}, and your-api-key with your actual values.
  2. Restart Claude Desktop.
Your Blueprints now appear as available tools in Claude Desktop.

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Connect with Cursor

  1. Copy the Standard Endpoint URL from the Connect dialog.
  2. In Cursor, open Settings → MCP.
  3. Add a new MCP server with:
    • URL: your Standard Endpoint
    • Headers: X-API-Key: your-api-key
  4. Save and your Blueprints become available as tools in Cursor’s AI features.

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Connect with other MCP clients

Any MCP-compatible client can connect to your Blueprints. You need:
  • The Standard Endpoint or SSE Streaming Endpoint URL (depending on what the client supports)
  • An API key passed as the X-API-Key header
Refer to your client’s documentation for how to configure MCP server connections.

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What to do next