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List supported countries

List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available.

Host	postal.openverbs.com
Price	$0.002 per call
Network	Base
Paid endpoints listed	4
Calls, last 30 days*	6
Most unique payers on one endpoint (30 days)*	3
Last paid call*	2026-10-06
Tags	supported postal countries, list postcode countries, postal country codes, zip validation coverage, postal code country list, postal code regex, country postcode pattern, zip code pattern lookup

* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.

Endpoints

URL	Method	Price
`https://postal.openverbs.com/v1/countries` List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available.	POST	$0.002
`https://postal.openverbs.com/v1/spec` Return the validation regular expression (source and flags) used for a country's postal codes.	POST	$0.002
`https://postal.openverbs.com/v1/format` Normalise a postal code's casing and whitespace (uppercase, collapse runs of spaces) and report whether the normalised…	POST	$0.002
`https://postal.openverbs.com/v1/validate` Check whether a postal / ZIP code is well-formed for a country (ISO 3166-1 alpha-2). A malformed code is a successful…	POST	$0.002

Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.

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