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Greeneris Postal Code Geo Lookup
x402
Greeneris Postal Code Geo Lookup is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Resolves a postal code to city/state/coordinates (forward) or finds a postal code for a city+state pair (reverse) for a given country
Price / call$0.001
Success—
StatusUnknown
How this service works
Postal code resolution for ~60 countries via Zippopotam.us (GeoNames data, CC BY 4.0). Forward: ?country=us&code=90210 -> place names, state, lat/lon. Reverse: ?country=us&state=ca&city=beverly hills -> matching postal codes with coordinates. Unknown codes return found=false (an explicit validation verdict). Cached 30 days.
Output
Returns a JSON object with mode (forward or reverse), found flag, count, and an array of matching places each containing city name, state, state code, latitude, longitude, plus country name, country code, postal code, and the data source attribution.
Example use cases
Example prompt
“What city and state does the postal code 90210 correspond to in the US, and what are its coordinates?”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/geo/postalWhen to prefer
Use this endpoint when you need to resolve a postal code to geographic coordinates and city/state metadata, or perform a reverse lookup from city+state to postal code, for countries supported by GeoNames/Zippopotam data. Prefer this over geocoding APIs that require full addresses when you only have a zip/postal code. Particularly useful for address enrichment, delivery zone validation, and location normalization pipelines. At $0.001 per call with no account required, it is well-suited for high-volume agent workflows using x402 pay-per-call.
Side effects
- Missing required 'country' query parameter returns 400 error
- Invalid or nonexistent postal code returns found:false with empty places array
- Unsupported country code may return no results
- HTTP 402 payment required if x402 payment not included or invalid
- Malformed country code (not ISO 2-letter) may return error
- Reverse mode requires both city and state parameters; missing one may yield no results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mode": "forward",
"count": 1,
"found": true,
"places": [
{
"name": "Beverly Hills",
"state": "California",
"latitude": 34.0901,
"longitude": -118.4065,
"state_code": "CA"
}
],
"source": "Zippopotam.us, data from GeoNames (CC BY 4.0, attribution required)",
"country": "United States",
"postal_code": "90210",
"country_code": "US"
}
}Tags
x402
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