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Phone — entry 003 of 7

Cloudmersive Validate

Verified Jul 2026

Cloudmersive's Phone Number Validation API parses and standardizes global phone numbers, returning line type, E.164/international/national formats, and country data, with client libraries for over 10 languages. A live OPTIONS preflight against its real API host, api.cloudmersive.com/validate/phonenumber/basic, returned Access-Control-Allow-Origin: * (cors reconfirmed "yes"), and a follow-up unauthenticated POST returned a 401 "Invalid API key or exceeded limits" over HTTPS, reconfirming auth "API Key" and https true. Its pricing page offers 600 free calls/month with no expiration alongside a $2,000/month paid tier — freemium.

phone-validatione164internationalsdkfreemium
Visit cloudmersive.com ↗Read the docs ↗More Phone
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score75out of 100
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months

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Scored 75 on greatapis.com
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Auth quickstart

  1. Sign up with the provider to get an API key.
  2. Send it on every request as a headerAuthorization: <key>
  3. 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.

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Cloudmersive Validate vs Phone Specification

Phone Specification needs no API key, while Cloudmersive Validate requires API Key — pick Phone Specification to start without signup.

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Cloudmersive Validate vs Numlookup

Numlookupapi.com (an Everapi GmbH product) validates phone numbers and returns formatting, country, location, carrier, and line type via a REST endpoint that takes the number as a path parameter. A live OPTIONS preflight against its real API host, api.numlookupapi.com/v1/validate/, returned access-control-allow-origin echoing the request Origin plus access-control-allow-credentials: true, resolving the stored "unknown" cors to "yes"; a follow-up unauthenticated GET returned a 401 with www-authenticate: Key and a missing_api_key JSON error, confirming auth "API Key" over HTTPS. Its pricing page offers a Free plan (100 requests/month) alongside paid Basic/Pro/Scale tiers — freemium.

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Cloudmersive Validate vs Numverify

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.

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Cloudmersive Validate vs Phone Validation

AbstractAPI's Phone Validation API checks whether a number is real, and returns its carrier, line type, risk score, and registered location, from a single GET request. The stored url redirected (301) to /api/phone-validation-api, now recorded as the canonical link. A live GET against its real host, phonevalidation.abstractapi.com/v1/, returned Access-Control-Allow-Origin: * (cors reconfirmed "yes") and a 400 validation error demanding the api_key parameter, confirming auth "API Key" over HTTPS. Its landing page advertises 100 free requests with no credit card required, ahead of paid usage tiers — freemium.

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Cloudmersive Validate vs Veriphone

Veriphone validates phone numbers and returns carrier, line type (mobile/fixed/VoIP), and formatted output for 243 countries, either via a single lookup or bulk CSV upload. Its own docs state "CORS is enabled on all endpoints," and a live OPTIONS preflight plus an unauthenticated GET against api.veriphone.io/v3/verify both returned Access-Control-Allow-Origin echoing the request Origin, reconfirming cors "yes"; the GET also returned a 400 JSON error demanding the key parameter, reconfirming auth "API Key" over HTTPS. Its pricing page offers 1,000 free validations/month with no credit card required, alongside one-time credit packs and monthly subscription tiers — freemium.

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Cloudmersive Validate vs VeriRoute Intel

Cloudmersive Validate is freemium, while VeriRoute Intel is metered — Cloudmersive Validate is the cheaper way in.

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