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Postal Code Regex Spec Lookup
x402
Postal Code Regex Spec Lookup is a paid API for AI agents from postal.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns the validation regular expression (pattern source and flags) used to validate postal codes for a given country.
Price / call$0.002
Success—
StatusUnknown
How this service works
Return the validation regular expression (source and flags) used for a country's postal codes.
Output
The endpoint returns the regular expression source string and associated flags used to validate postal codes for the requested country, enabling the caller to reconstruct and apply the exact regex pattern programmatically.
Example use cases
Build country-aware postal validation
“I'm building a checkout form that needs to validate postal codes differently for each country — can you get me the regex spec for France so I can implement the validation logic on the client side?”
Audit postal validation rules
“We're auditing our address validation system — can you pull the official postal code regex spec for Canada so I can compare it against what we currently have?”
Generate postal code test cases
“I need to write unit tests for postal code validation in Japan — can you fetch the regex pattern and flags for JP so I know exactly what format to test against?”
Technical details
Endpoint
POSThttps://postal.openverbs.com/v1/specWhen to prefer
Use this endpoint when you need the raw regex specification (pattern source + flags) for a country's postal code format, rather than simply validating a specific code. It is ideal for building client-side validators, generating test cases, or auditing existing validation logic. Prefer this over the sibling validation endpoint when you need the rule itself, not a pass/fail answer for a particular postal code.
Side effects
- Unsupported country code — if the ISO 3166-1 alpha-2 code has no known postal pattern, the endpoint may return an error or empty result
- Invalid country code format — supplying a code shorter than 2 characters or a non-ISO code will fail schema validation
- Payment failure — missing or invalid x402 payment header will result in a 402 response
- Network timeout — transient connectivity issues may cause request failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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