About
zipcodestack provides a ZIP Code and postal code REST API for global address validation and postal code search. It exposes endpoints for searching postal codes and calculating distance between codes, with documentation and API key-based access.
The service covers 210+ countries and updates postal code data regularly. The free plan includes 300 credits and 10 requests per minute, making it suitable for lightweight development, testing, and low-volume production use where global postal code validation is needed.
- ZIP Code and postal code REST API
- 210+ countries of coverage
- Postal code search endpoint
- Distance calculation endpoint
- 300 credits on the free plan
- 10 requests per minute
- API key authentication
- Regular data updates
Free Tier Value
This free tier is a capped starter plan with 300 credits, one API key, and a 10 requests/minute limit, so it has real utility but only for light testing or very small projects. The cheapest paid plan is $34.99/month and removes the rate limit while raising the credit allowance sharply, so the free tier is worth only a small fraction of that—roughly $2/month in practical value. A credit card is not required, which lowers friction, but the monthly cap keeps it well below the paid plans.
What's included in the free tier
- 300 Credits per month.
- 1 API key.
- 10 requests per minute.
See zipcodestack pricing for current limits.
Paid plans
Small
- credits
- 70,000
- api_keys
- 1
- For commercial use
- 1 API key
- No rate limit
- E-mail support
Medium
- credits
- 250,000
- api_keys
- 2
- For commercial use
- 2 API keys
- Sandbox API keys
- No rate limit
- E-mail support
- Team management
Large
- credits
- 2,500,000
- api_keys
- 5
- For commercial use
- 5 API keys
- Sandbox API keys
- No rate limit
- E-mail support
- Team management
- IP white- & blacklisting
- URL whitelisting
Custom
- For commercial use
- Custom API keys
- Sandbox API keys
- No rate limit
- Tailored support
- Team management
- Custom SLA
- Overages
Pricing extracted from zipcodestack's pricing page. Always verify current pricing before committing.
