GST 2.0 · 09/2025-CT(Rate) · Updated Sept 2025

GST at the speed of business

Compliance. Accelerated.  ·  CBIC-sourced · Condition-aware · Agent-native

POST gstaccelerator.in/v1/lookup
// Select a product above or type your own
48,752 HSN codes
681 SAC codes
7 GST schedules
<200ms P99 latency
Why GST Accelerator

Not just a lookup.
A compliance engine.

Every competitor returns a flat rate. We return the rate that actually applies to your specific transaction — with the notification clause to prove it.

NOTIFICATION 09/2025-CT(Rate)

Condition resolver

Branded vs unbranded. B2B vs B2C. Price thresholds. Supply type. Works contract vs outright sale. We parse the notification conditions from the CBIC source and evaluate them against your transaction — so you don't have to read 200-page PDFs before every invoice.

✓ What FastGST can't do
FORMULA IGST = CGST + SGST

All three components

Inter-state? Intra-state? UT supply? Pass your supply type, get the right split. No manual tax maths.

STANDARD MCP 2025-03-26

Agent-native MCP endpoint

Claude, GPT-4o, and every major agent framework call our MCP endpoint natively. Your AI invoice workflow gets verified GST rates as a tool call.

↗ Agent economy ready
COVERAGE 11/2025-CT(Rate)

SAC for services

681 SAC codes. Construction services at 9% (post amendment). IT consulting. Finance. The endpoints competitors skipped.

EVENT GST Council Notification

Rate-change webhooks

Your application gets a push the moment the CBIC notification goes live. Never serve stale rates after a council meeting.

AUDIT Notification + Effective Date

Audit trail built-in

Every response carries the exact CBIC notification reference and effective date. Your CA can trace every rate your system ever used.

Start free. Scale as you grow.

No contracts. Cancel any time. GST invoice included on all paid plans.

Free
₹0
forever
100 calls / month
HSN + SAC lookup
CGST / SGST / IGST output
JSON + Swagger docs
Condition resolver
MCP endpoint
Rate-change alerts
Get free key
Recommended for integration
Developer
₹399
/ month
5,000 calls + ₹0.10/extra
Everything in Free
Condition resolver
MCP endpoint
99.5% uptime SLA
Rate-change email alerts
Webhooks
Get started
Pay via UPI · Cards · Net Banking
Pro
₹1,499
/ month
50,000 calls + ₹0.08/extra
Everything in Developer
Bulk CSV classification
Rate-change webhooks
99.9% uptime SLA
Priority support
Superseded rates feed
Get started
Business
₹5,999
/ month
Unlimited calls
Everything in Pro
White-label option
Custom HSN taxonomy
Dedicated SLA
WhatsApp support
GST invoice included
Get started
Integration

Live in under 5 minutes.

One endpoint. Predictable JSON. Works with any language, framework, or AI agent.

# Lookup by product description — intrastate supply curl -X POST https://gstaccelerator.in/v1/lookup -H "X-API-Key: gsta_your_key" -H "Content-Type: application/json" -d '{ "description": "split AC unit", "supply_type": "intrastate", "branded": true }' # Response { "hsn_code": "84151010", "description": "Air conditioning machines, split system", "tax_rates": { "igst": 18.0, "cgst": 9.0, "sgst": 9.0, "cess": 0.0, "total_intrastate": 18.0 }, "applicable_rate": "CGST 9% + SGST 9% = 18%", "notification_ref": "09/2025-CT(Rate), Schedule II", "effective_date": "2025-09-22" }
import requests session = requests.Session() session.headers["X-API-Key"] = "gsta_your_key" BASE = "https://gstaccelerator.in/v1" # Lookup by description r = session.post(f"{BASE}/lookup", json={ "description": "gold jewellery", "supply_type": "interstate" }) data = r.json() print(data["tax_rates"]["igst"]) # → 3.0 print(data["notification_ref"]) # → "09/2025-CT(Rate), Schedule IV" # Direct HSN code lookup rate = session.get(f"{BASE}/hsn/71081200").json() print(rate["applicable_rate"]["interstate"]) # → "IGST 3%" # Bulk — up to 100 items per call bulk = session.post(f"{BASE}/bulk", json={"items": [ {"description": "cotton shirt", "branded": True}, {"description": "laptop", "supply_type": "intrastate"}, {"description": "construction work", "sac": True}, ]})
const BASE = "https://gstaccelerator.in/v1"; const headers = { "X-API-Key": "gsta_your_key", "Content-Type": "application/json" }; // Lookup — intrastate mobile phone const res = await fetch(`${BASE}/lookup`, { method: "POST", headers, body: JSON.stringify({ description: "mobile phone", supply_type: "intrastate", branded: true }) }); const { tax_rates, applicable_rate } = await res.json(); // Auto-calculate invoice tax const value = 25000; const cgst = (value * tax_rates.cgst) / 100; // ₹2,250 const sgst = (value * tax_rates.sgst) / 100; // ₹2,250 console.log(applicable_rate); // "CGST 9% + SGST 9% = 18%"
# claude_desktop_config.json — or any MCP-compatible agent { "mcpServers": { "gst-accelerator": { "type": "url", "url": "https://gstaccelerator.in/mcp", "headers": { "X-API-Key": "gsta_your_key" } } } } # Tools your agent gets natively: # lookup_hsn_rate(description, supply_type?, branded?, sale_value_inr?) # get_rate_by_hsn(hsn_code, supply_type?) # get_sac_rate(sac_code, supply_type?) # bulk_classify(items[]) # Example system prompt addition: "Before generating any invoice line item, call lookup_hsn_rate to retrieve the verified CGST/SGST/IGST rates. Never hardcode tax percentages. Use the notification_ref field for audit logs."