Ziplore: City-to-ZIP Code Lookup with Demographics

Use this endpoint when you need to resolve a US city name into its associated ZIP codes along with enriched geographic and demographic context in a single call. Prefer this over raw Census APIs when you want a simple, low-cost per-call lookup that bundles ZIP, county, time zone, and demographics together. Best for enriching address data, building sales territories, or powering location-aware applications that start from a city name rather than a ZIP code.

• City name not found — returns empty results or 404 if city doesn't exist in the database
• Missing required 'city' query parameter — returns a 400 bad request error
• Ambiguous city name without state filter — may return results from multiple states
• Limit parameter out of range (below 1 or above 50) — returns validation error
• Payment not processed — returns 402 Payment Required if x402 payment header is missing or insufficient