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GSTIN Format Validator
x402
GSTIN Format Validator is a paid API for AI agents from verifyapi.hillguava.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Validates the format of a 15-character Indian GSTIN by checking state code, embedded PAN, entity type, and Luhn-mod-36 checksum
Price / call$0.005
Success—
StatusUnknown
How this service works
GSTIN format validation: state code, embedded PAN, entity type, Luhn-mod-36 checksum.
Output
Returns a structured validation result indicating whether the 15-character GSTIN passes format checks, including whether the embedded state code is valid, the PAN segment is correctly formed, the entity type character is recognized, and the Luhn-mod-36 checksum is correct.
Example use cases
Example prompt
“Can you check if this GSTIN is valid: 27AAPFU0939F1ZV? I want to know if the state code, PAN, entity type, and checksum all check out before I use it on an invoice.”
Technical details
Endpoint
GEThttps://verifyapi.hillguava.xyz/verify/gstin-format/:gstinWhen to prefer
Use this endpoint when you need lightweight, offline-style format validation of a GSTIN before submitting it to a government API or using it on a tax invoice. It checks structural correctness (state code, PAN, entity type, checksum) without making a live lookup against the GST portal — ideal for fast pre-validation in form submissions or data pipelines.
Side effects
- GSTIN not exactly 15 characters — returns format error
- invalid state code prefix — flagged in response
- malformed PAN segment in characters 3–12 — validation fails
- unrecognized entity type character at position 13 — flagged
- checksum mismatch (Luhn-mod-36 failure) — returns invalid
- payment not provided or insufficient — HTTP 402 returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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