Lightning-fast, async-first HSN/SAC rate lookups and GSTIN validation for enterprise Indian B2B platforms. Features native Model Context Protocol (MCP) compliance to instantly connect your AI agents to live Indian tax data.

⚡ Key Features

Built for the scale and reliability required by modern fintech platforms and high-throughput enterprise systems.

• 🚀 Lightning-Fast & Async-First: Non-blocking API requests designed for extreme concurrency and low-latency environments.
• 🛡️ Enterprise Reliability: Built-in connection pooling, exponential backoff, and robust error handling for rate limits or inactive/blocked GSTINs.
• 🤖 Zero-Config MCP Server: Native integration for AI agents (Claude Desktop, Cursor, Windsurf). Give your LLMs secure access to live tax rate intelligence instantly.
• 🇮🇳 Fully Compliant: Always updated with the latest CBIC rate notifications (including GST 2.0).
• 🧩 Dual SDK: Available simultaneously for both Python (PyPI) and Node.js/TypeScript (npm).

📦 Installation

Install the library in your preferred environment:

Python 3.10+

pip install gstaccelerator

Node.js (TypeScript Ready)

npm install gstaccelerator

🚀 Dual-Mode Usage Quickstart

1. Standard SDK Usage

Fetch precise tax details or validate business identity via a GSTIN seamlessly in your application.

Python (asyncio)

import asyncio
from gstaccelerator import GSTClient

async def check_gstin():
    # Initialize client with your API key
    client = GSTClient(api_key="your_api_key_here")
    
    try:
        # Fetch high-speed GSTIN details
        business = await client.get_gstin_details("27AADCB2230M1Z2")
        print(f"Business Name: {business.legal_name}")
        print(f"Status: {business.status}") # e.g., 'Active'
    finally:
        await client.close()

asyncio.run(check_gstin())

TypeScript / Node.js

import { GSTClient } from 'gstaccelerator';

async function checkGstin() {
    // Initialize client with your API key
    const client = new GSTClient({ apiKey: "your_api_key_here" });
    
    try:
        // Fetch high-speed GSTIN details
        const business = await client.getGstinDetails("27AADCB2230M1Z2");
        console.log(`Business Name: ${business.legalName}`);
        console.log(`Status: ${business.status}`);
    } finally {
        await client.close();
    }
}

checkGstin();

2. MCP Server Configuration (For AI Agents)

You can mount gstaccelerator as a native MCP server to allow AI models to query GST and HSN rates directly during agentic workflows.

Add the following block to your claude_desktop_config.json (or Cursor/Windsurf configuration):

{
  "mcpServers": {
    "gstaccelerator": {
      "command": "npx",
      "args": [
        "-y",
        "gstaccelerator",
        "mcp"
      ],
      "env": {
        "GST_API_KEY": "your_api_key_here"
      }
    }
  }
}

(Python equivalent command: "command": "gstaccelerator-mcp")

🛑 Error Handling

Enterprise systems require structured, predictable failures. The SDK bubbles up clean, typed exceptions for edge cases rather than silent failures or raw HTTP dumps.

from gstaccelerator.exceptions import InvalidGSTINError, RateLimitError

try:
    data = await client.get_gstin_details("INVALID123")
except InvalidGSTINError as e:
    print(f"Validation failed: {e.message}") # The GSTIN format is invalid
except RateLimitError as e:
    print(f"Throttled! Retry after {e.retry_after} seconds.")
except Exception as e:
    print("An unexpected network error occurred.")

🔗 Links

• Website & Dashboard: gstaccelerator.in
• Documentation: docs.gstaccelerator.in
• Python Repo: github.com/thedivine1/gstaccelerator-python
• Node Repo: github.com/thedivine1/gstaccelerator-js