India utility APIs compared
Side-by-side facts for GSTIN verification and pincode lookup on APISeeker.
Updated 4 Sept 2026
These APIs solve different jobs — identity/compliance vs address enrichment — but often ship together in Indian onboarding flows.
Values are from published APISeeker catalog plans and docs.
| Feature | APISeeker | Typical market |
|---|---|---|
| Primary job | GSTIN verify + pincode lookup | Often sold separately |
| Auth | API key (X-API-Key) | API key |
| Free tiers | Yes on both listings | Mixed |
| Versioned REST | /v1 paths | Varies |
| Operator label | Shown on listing | Often unclear |