Geocoding — entry 078 of 80
ZipCodeAPI
ZipCodeAPI covers US ZIP codes and Canadian postal codes with distance, radius, and multi-point lookup endpoints (e.g. /rest/<key>/distance.json/<zip1>/<zip2>/<units>), returning JSON or CSV. It's free forever up to 10 requests/hour (50/hour during a two-week trial), with paid plans above that for higher throughput; over a decade in operation with a handful of reported outages.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSUnknownNot documented — test from the browser before relying on it.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, CSVResponses can be requested as JSON or CSV.
GreatAPIs Score
Score81
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/zipcodeapi/"><img src="https://greatapis.com/badge/zipcodeapi.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.