Question 1

How much does PostalDataPI cost?

Accepted Answer

PostalDataPI costs $0.000028 per query. There are no tiers, no monthly fees, and no per-country pricing. Every new account gets 1,000 free queries with no credit card required.

Question 2

Is there a free tier?

Accepted Answer

Yes. Every new account receives 1,000 free queries with no credit card required. After that, queries cost $0.000028 each.

Question 3

How does billing work?

Accepted Answer

PostalDataPI uses a pay-as-you-go model. You recharge your balance at any time (minimum $5). Each query deducts $0.000028 from your balance. You can also set up auto-recharge so you never run out.

Question 4

Is the price the same for all countries?

Accepted Answer

Yes. The same $0.000028 per query rate applies whether you query US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, or any of the 240+ supported countries.

Question 5

What countries does PostalDataPI support?

Accepted Answer

PostalDataPI supports 240+ countries and territories including the United States, United Kingdom, Germany, Japan, Canada, France, Australia, and many more.

Question 6

What data does PostalDataPI return?

Accepted Answer

The /lookup endpoint returns city and state/region. The /metazip endpoint returns full metadata including coordinates (latitude/longitude), county, and timezone. The /validate endpoint checks if a postal code exists. The /city endpoint finds all postal codes for a given city.

Question 7

How fast is PostalDataPI?

Accepted Answer

PostalDataPI delivers sub-5ms response times. Most queries return in 1-3 milliseconds, making it fast enough for autocomplete, form validation, and real-time applications.

Question 8

Does PostalDataPI offer SDKs?

Accepted Answer

Yes. Official SDKs are available for Python and Node.js. Install with pip install postaldatapi or npm install postaldatapi. Both provide typed responses and simple client interfaces.

Question 9

How do I get started?

Accepted Answer

Sign up for a free account, get your API key from the dashboard, and make your first query. You can use the REST API directly or install the Python or Node.js SDK.

Question 10

Can I control rate limits and abuse protection?

Accepted Answer

Yes. PostalDataPI gives you full control over your own rate limits and abuse protection settings from your account dashboard. Set per-minute, per-hour, or per-day limits however you want.

Question 11

What authentication does PostalDataPI use?

Accepted Answer

Every API request includes your API key in the JSON request body. Account login uses OAuth (Google, GitHub, or Microsoft) for security and convenience. No passwords to manage.

Question 12

Is there a rate limit?

Accepted Answer

Default rate limits are generous for normal usage. You can customize your own rate limits from your account dashboard. If your application requires higher limits, contact support.

Frequently Asked Questions