API guides/India
Free Indian PIN code API options: unofficial postalpincode.in for quick lookups vs official data.gov.in datasets. Step-by-step examples for post office, district, and state.
2 providers · 6 min · Limits change — verify before you ship
India
A 6-digit Indian PIN code maps to one or more post offices, a district, and a state. For prototypes, the unofficial Postal Pincode API is the fastest free HTTP call. For production, prefer an official data.gov.in catalogue you can cache — and validate PAN/GSTIN/IFSC shapes locally with India fixtures when you are only checking format.
Two common paths. Use the table, then follow the steps for the path you pick.
| Postal Pincode API | data.gov.in | |
|---|---|---|
| Official? | No — community wrapper | Yes — government open data |
| API key | None | Free registered key |
| CORS | Usually yes (browser OK for demos) | No — call from a server |
| SLA | None | Per-dataset quotas |
| Best for | Prototypes, forms, demos | Production caches, compliance |
Fastest path when you just need district/state for a PIN in a prototype.
Better when you need an attributable government source and can proxy through your backend.
PIN lookup pairs with bank and format helpers when you build Indian address or onboarding flows.
| Provider | Pricing | Key | HTTPS | CORS |
|---|---|---|---|---|
| Postal Pincode API (unofficial) | Free | No key | Yes | Usually yes |
| data.gov.in (official catalogues) | Freemium | Required | Yes | Backend only |
GET https://api.postalpincode.in/pincode/{PIN}
HTTPS
Yes
API key
No key
CORS
Usually yes
Use
Free tier
Limits. No SLA. Community-run. Cache responses; do not use as a payment-critical dependency.
Commercial. Unofficial. Read the site before commercial use.
Note. This is not India Post’s official product. Confirm the current host and terms on their site.
curl -sS "https://api.postalpincode.in/pincode/110001"GET https://api.data.gov.in/resource/{resource_id}?api-key=YOUR_KEY&format=json
HTTPS
Yes
API key
Required
CORS
Backend only
Use
See limits
Limits. Free registered key with per-resource quotas. See each dataset’s API tab.
Commercial. Government open data. Follow the dataset licence.
Note. Search data.gov.in for “all India pincode” (or similar) and copy the resource id from that dataset. Full key walkthrough: PureDevKit data.gov.in guide.
curl -sS "https://api.data.gov.in/resource/RESOURCE_ID?api-key=YOUR_KEY&format=json&limit=10"PureDevKit does not host or proxy these APIs. Pricing, rate limits, CORS, authentication, and JSON shapes can change without notice. Always confirm the current rules on the provider’s official documentation before you ship.
data.gov.in API key — register, query datasets & examples
How to get a free data.gov.in API key, find a dataset resource ID, and run your first JSON request. India open data portal — server-side only.
IFSC to bank details API (India)
Look up Indian bank branch details from an 11-character IFSC using Razorpay’s free IFSC API. No key. Confirm limits on their site.
Free Geocoding API Comparison (2026) — Nominatim, Google, Mapbox
Compare free and freemium geocoding APIs in 2026: Nominatim (OpenStreetMap), Google Geocoding, and Mapbox. Rate limits, CORS, commercial use, and copy-paste examples.