Numverify vs Phone Specification

Numverify (an APILayer product) validates phone numbers against international numbering-plan rules and returns carrier, line type, and location data for 232 countries. Its documented base endpoint, apilayer.net/api/validate, answered a live GET with a 200 JSON body carrying access-control-allow-origin: * — resolving the stored "unknown" cors to "yes" — and rejected the request with an invalid_access_key error, confirming auth "API Key"; the same endpoint also answers on https://, confirming the stored https true even though the docs quote the base URL as plain http://. Its pricing page offers a free-forever plan (100 requests/month) alongside paid Basic/Professional/Enterprise tiers — freemium.

Phone Specs API is an open-source, keyless wrapper around GSMArena's device database, returning brand lists, per-phone specifications, and search results as JSON — maintained by a single developer (Azhari Muhammad M) and deployed on Vercel. Both README-documented custom domains (api-mobilespecs.azharimm.dev for v1, phone-specs-api-2.azharimm.dev for v2) no longer resolve, but the underlying Vercel deployment is still live and reachable directly: its root endpoint returned a 200 JSON payload confirming auth "None" and https true, and a live OPTIONS preflight carried Access-Control-Allow-Origin: * (cors reconfirmed "yes"); the /brands and /latest routes intermittently 500 with a 429 from the upstream GSMArena scrape target, a source-side rate-limit rather than the API itself being down.