# gst-validator-mcp

> Validate Indian GSTIN numbers (Goods & Services Tax IDs) — structure, state code, embedded PAN, and check character. Pure local compute, no upstream API. For AI agents handling Indian invoices, KYC, vendor onboarding.

## Tools
- validate_gstin(gstin) — full structural + checksum validation
- extract_pan(gstin) — pull the 10-char PAN from a GSTIN
- state_from_gstin(gstin) — resolve TIN state code to state/UT name

Endpoint: https://gst-validator-mcp.atlasword.workers.dev/mcp