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Cursor IDE + GST Maker MCP

Developer IDE

Access live Indian tax math, HSN searches, and GSTIN checksum validation directly inside your AI coding editor

Cursor Website

.cursor/mcp.json

Place this configuration in your workspace root or global Cursor settings

{
  "mcpServers": {
    "gst-maker": {
      "command": "uv",
      "args": [
        "run",
        "python",
        "core/mcp_server.py"
      ]
    }
  }
}
Workspace Config Path:

<your-project-root>/.cursor/mcp.json or through Cursor Settings → Features → MCP.

How to Setup Cursor MCP

Equip Cursor Agent with statutory tools

  1. 1
    Create .cursor/mcp.json Create the .cursor folder in your project repository and add mcp.json.
  2. 2
    Paste the MCP Server Command Paste the JSON configuration snippet above specifying core/mcp_server.py.
  3. 3
    Enable Tools in Cursor Settings Open Cursor Settings, navigate to Features → MCP, and verify the green status indicator.
  4. 4
    Prompt Cursor Agent with Tax Tasks In Composer, ask Cursor: 'Write a seed script inserting products with valid HSN codes for electronics'. Cursor will call the live HSN tool!

Pro Tips for Fintech Developers

Building compliant billing software

  • Validate Seed Data Programmatically Let Cursor use validate_gstin when writing synthetic test fixtures to ensure mock clients have valid Mod-36 checksums.
  • Zero Rounding Discrepancies Ensure Cursor references calculate_gst implementation to replicate standard Indian half-up rounding rules.
  • Unit Test Generation with Live Oracles Have Cursor compare your custom billing engine outputs against GST Maker's verified MCP handlers as ground-truth test assertions.
  • Rapid Feature Prototyping Build customer-facing invoicing portals in React or Next.js while delegating tax computation to the background MCP server.