Telephony & SMS Services10 Verified APIs

Free Telephony & SMS Services APIs

SMS delivery, phone number formatting, and carrier lookup endpoints

Interactive In-Browser Tools for this Category:Test endpoints and format data with zero setup

Telephony & SMS Services API Comparison Overview

Top Endpoints
API ServiceAuth TypeRate LimitSecurityDirect Link
NumverifyFree Key100 istek/ayHTTPS • CORSDocs
Phone ValidationFree Key500 istek/ayHTTPS • CORSDocs
VeriphoneFree KeyDeğişkenHTTPS • CORSDocs
Cloudmersive ValidateFree Key800 istek/ayHTTPS • CORSDocs
Phone SpecificationNo KeySınırsızHTTPS • CORSDocs
E.164 International Phone ValidatorNo KeySınırsızHTTPS • CORSDocs

Available Endpoints (10)

GET

Numverify

Global phone number validation, international carrier lookup, and line type

Telephony & SMS ServicesAPI KeyCORS
GET

Phone Validation

Validate international telephone numbers, detect formatting, and identify mobile carriers

Telephony & SMS ServicesAPI KeyCORS
GET

Veriphone

Global phone number verification, telecom carrier lookup, and country format check

Telephony & SMS ServicesAPI KeyCORS
GET

Cloudmersive Validate

Validate and standardize phone numbers across 200+ countries with carrier detection

Telephony & SMS ServicesAPI KeyCORS
GET

Phone Specification

Comprehensive mobile phone technical specifications, battery stats, and camera specs

Telephony & SMS ServicesNo AuthCORS
GET

E.164 International Phone Validator

Zero-dependency ITU-T E.164 international phone number validator, country detector, and national format normalizer.

Telephony & SMS ServicesNo AuthCORS
GET

Dutch Customer Data API

Verify and standardize Dutch customer and business data, including addresses, phone numbers, emails, URLs, VAT, IBAN, Chamber of Commerce (KvK) numbers, and postal codes.

Telephony & SMS ServicesNo AuthCORS
GET

Fedora Messaging API

Retrieve historical messages sent via Fedora Messaging using HTTP GET requests. Query by username, package, message source, topic, etc.

Telephony & SMS ServicesNo AuthCORS
GET

Phone Number Validator

This API validates phone numbers, providing details such as the local and international format. It identifies the country, carrier, and line type for the given number, ensuring accurate communication.

Telephony & SMS ServicesNo AuthCORS
GET

LeakCheck Breach Checker

Security and data breach verification API that checks if an email or username appeared in known public data breaches.

Telephony & SMS ServicesNo AuthCORS

About Free Telephony & SMS Services APIs

This directory curates 10 verified public APIs in the Telephony & SMS Services domain. Developers can build dashboards, mobile applications, automation bots, and microservices with these ready-to-integrate endpoints without upfront billing.

Do I need an API key?

Several APIs listed here operate as Zero-Auth services where you can execute queries directly. Others provide free developer tiers with an instant key upon registration.

Does FreeAPI support CORS?

Yes, all endpoints can be called through FreeAPI Smart Edge Gateway to bypass browser CORS headers and inspect live responses.