Free Telephony & SMS Services APIs
SMS delivery, phone number formatting, and carrier lookup endpoints
Telephony & SMS Services API Comparison Overview
Top EndpointsAvailable Endpoints (10)
Numverify
Global phone number validation, international carrier lookup, and line type
Phone Validation
Validate international telephone numbers, detect formatting, and identify mobile carriers
Veriphone
Global phone number verification, telecom carrier lookup, and country format check
Cloudmersive Validate
Validate and standardize phone numbers across 200+ countries with carrier detection
Phone Specification
Comprehensive mobile phone technical specifications, battery stats, and camera specs
E.164 International Phone Validator
Zero-dependency ITU-T E.164 international phone number validator, country detector, and national format normalizer.
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.
Fedora Messaging API
Retrieve historical messages sent via Fedora Messaging using HTTP GET requests. Query by username, package, message source, topic, etc.
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.