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International Address Formats – Postal Code Country Classifier
x402
International Address Formats – Postal Code Country Classifier is a paid API for AI agents from address-formats.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Guesses which country or countries a postal code belongs to based on its format/shape, flagging ambiguity when multiple countries match.
Price / call$0.02
Success—
StatusUnknown
How this service works
Guess which country a postal code belongs to from its shape among candidates, flagging ambiguity honestly.
Output
Returns a structured response including the postal code tested, its detected format shape, a list of matching countries with names and codes, a verdict string, an ambiguity flag, reasons for each match, a summary sentence, match count, the number of countries tested, any countries without pattern data, and data source/attribution metadata.
Example use cases
Disambiguating an unknown postal code
“I have the postal code 'EC1A 1BB' and I'm not sure if it's from the UK or Ireland — can you check which country it actually belongs to and tell me if there's any ambiguity?”
Validating international checkout address
“A customer entered '75008' as their postal code but didn't select a country — can you figure out which country that postal code most likely belongs to, checking France, Belgium, and Luxembourg?”
Data cleaning for address database
“I've got a list of postal codes with missing country fields. Start with '10115' — can you identify which country that format matches and flag it if it could belong to more than one country?”
Technical details
Endpoint
GEThttps://address-formats.x402tookit.com/address-parse-hints?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a postal code string but no associated country, and need to infer or validate which country (or countries) it could belong to — particularly useful for e-commerce checkout validation, data cleaning, address parsing pipelines, and fraud detection. Prefer this over a full address validation service when country is unknown. Use the candidates parameter to narrow the search when you have a short list of likely countries, improving precision and reducing ambiguity.
Side effects
- Missing postal_code parameter returns an error
- Postal code that matches no country pattern returns empty matches with ambiguous:false and matchCount:0
- Degraded flag set true when some countries lack pattern data (testedWithoutPattern > 0)
- Ambiguous flag set true when multiple countries match, requiring human review
- Very short or numeric-only codes may match many countries simultaneously
- Invalid ISO country codes in candidates list may be silently skipped or cause errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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