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agentsvc.io Postal Code Lookup
x402
agentsvc.io Postal Code Lookup is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-10).
Looks up geographic details (place name, state, coordinates) for a postal code or city/state combination, supporting international queries via ISO country codes.
Price / call$0.0025
Success—
StatusUnknown
How this service works
86 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.
Output
Returns a JSON object with a 'found' boolean, a 'places' array containing objects with latitude, longitude, place name, state, and state code, plus the source data attribution, country code, and the queried postal code.
Example use cases
Validate shipping address postal code
“I need to confirm that postal code 80331 is a real place in Germany and find out what city and region it maps to before I ship this package.”
Enrich user profile with location data
“A user signed up with city 'Austin' and state 'TX' in the US — can you look up their zip code and coordinates so I can store their full location info?”
Reverse-look up place name from foreign postcode
“I have the postal code SW1A 1AA for the UK — what city and region does it belong to, and what are the coordinates?”
Technical details
Endpoint
POSThttps://agentsvc.io/api/v1/proxy/postal-code?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need lightweight, pay-per-call postal code resolution without managing API keys or subscriptions — ideal for agents enriching address data, validating postal codes, or geocoding city/state inputs internationally. Prefer this over full geocoding APIs when you only need postal-level granularity and want zero-setup USDC micropayment billing.
Side effects
- Postal code not found in GeoNames database — returns found: false with empty places array
- Invalid or unsupported country code — may return not found or error
- Missing required field combination (e.g. city without state for US) — may return ambiguous or no results
- Network timeout or upstream GeoNames outage — service error response
- Malformed input (non-string types) — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| city | string | |
| state | string | State abbreviation, required with city |
| country | string | ISO 3166-1 alpha-2 |
| postal_code | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"found": true,
"places": [
{
"lat": 48.1345,
"lon": 11.571,
"place": "München",
"state": "Bayern",
"state_code": "BY"
}
],
"source": "zippopotam.us (GeoNames)",
"country": "DE",
"postal_code": "80331"
},
"success": true
}
}Tags
x402
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