Smarty
Zipcodestack
PostalDataPI
Geoco.io
Melissa Data Quality
Loqate
usZIPCodes.org
REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah
OpenRouter
liteLLM
MandAPI
APIVAI
Portkey
OpenAI
boldrouter
OpenAI-compatible AI API gateway for GPT, Claude & Grok. Change baseURL, keep your code. Pay-as-you-go USDT; $0.20 auto credit on signup.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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API
APIClan.us
|
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|---|---|---|
| Website | zip-codes.com | apiclan.us |
| Pricing | — | |
| Company | Startup from the United States · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.
API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America — no separate APIs by country or data type. What it does Address validation and standardization — production-grade parser with ZIP+4 append, refreshed monthly Radius search — centroid haversine and...
No description of APIClan.us yet.
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An editorial look at what each product does well and who it suits.
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OpenAI-compatible multi-model API for GPT, Claude, Gemini, DeepSeek and more.
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