Communi­cation APIs for Business

CDYNE offers reliable and flexible SMS, voice, phone number verification, and address verification APIs that are easy to integrate and scale for your business.

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Where Connections and Communications Begin

CDYNE is a leading web service solution provider with a focus on communication and data quality enhancement.

Communication APIs


Programmable SMS API

SMS Notify!® API is a text message API designed to reliably send and receive messages globally. All at the world’s best pricing.

Explore SMS API

New Text Marketing Software

Easily send mass text to customers with our new texting software Dash Notify. No coding experience required.

Dash Notify

Voice Broadcast

Programmable Voice API

Phone Notify!® API is a voice API that can send thousands of automated voice messages to customers in minutes.

Explore Voice API

Data Quality APIs

Phone Validator

Verify Phone Numbers

Phone Verify!® API is a phone number verification API that can validate and authenticate mobile & landline numbers.

Explore Phone Verify API

USPS Address Verification

Instantly Validate Addresses

PAV API® is a USPS address validation API that can instantly validate numbers in the US & Canada.

Explore PAV API

Ringless Voicemail

Send calls straight to voicemail with ringless voicemail drops & share your message.

Ringless Voicemail


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Customer Satisfaction

97% of our clients have been satisfied with CDYNE’s services.
3 out of 4 clients use our service everyday.
95% of our clients would recommend CDYNE.
—Based on CDYNE’s 2018 Customer Survey