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Postal OpenVerbs - List Supported Countries
x402
Postal OpenVerbs - List Supported Countries is a paid API for AI agents from postal.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Returns every ISO 3166-1 alpha-2 country code for which a postal-code validation pattern is available.
Price / call$0.002
Success—
StatusUnknown
How this service works
List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available.
Output
An array or list of ISO 3166-1 alpha-2 country codes (e.g. 'US', 'GB', 'DE') representing every country for which the service has a postal-code validation pattern or regex available.
Example use cases
Pre-flight address validation setup
“Before I run postal code validation on my customer database, can you pull the list of countries that have supported postal patterns so I know which ones I can validate?”
Building a country selector UI
“I need to build a dropdown that only shows countries where postal code validation is available — can you fetch me the full list of supported ISO country codes?”
Checking coverage for international shipping
“We ship to about 40 countries — can you get the list of all countries with postal code patterns available so I can cross-check which of our destinations are covered?”
Technical details
Endpoint
POSThttps://postal.openverbs.com/v1/countriesWhen to prefer
Use this endpoint first, before calling any postal-code validation or normalization endpoints, to discover which countries are supported. It is the discovery/enumeration step in a postal validation workflow — ideal when building dynamic UIs, checking coverage, or filtering a dataset to only validatable countries.
Side effects
- Service unavailable (5xx) if the backend is down
- Payment required / x402 error if USDC payment is not provided
- Empty or null response if no countries are configured
- Network timeout on slow connections
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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