Voice API

Voice API

QuestBlue’s programmable voice API lets you create a custom voice calling solution that works for you and your customers. Incoming and outgoing calls are built right into your app or product.

Provide a new reach to your customer's voice

Integrate and automate your voice calling needs with our powerful and programmable Voice API

Simple to use API

Enjoy maximum flexibility and make sure your voice calls always take the shortest and quickest route with our SIP platform

Access our global IP network

Our expansive tier 1 network is the highest quality with 99.999% service availability and 25 geo-redundant points of presence across the U.S

We do the work

Install, maintenance & 24/7 monitoring is managed by our Engineers so you can focus on running your business

Simplified pricing & billing

Receive reduced costs compared to in-person meetings without any upfront payments nor hidden charges - pay for what you use, when you use it.

Reach out globally and enhance user experience with voice conversations

Bring an enterprise-grade SIP trunking provider to your organization with the reliable, software-driven voice calling you need


Frequently Asked Questions

A voice API, or application programming interface, is a software connection that enables companies to embed the ability to make and receive voice calls into their applications, software, and networks.
No. We allow you to use numbers from other providers. That being said, QuestBlue has an industry-leading porting and number management experience, so you’ll want to have your numbers with us.
Getting set up couldn’t be easier. Just sign up for an account, then follow one of our Bring Your Own Carrier guides to integrate with your PBX or softphone client.
Yes. With the our Voice API you can enable calling in your application. This includes toll-free voice, as well as inbound and outbound (or termination and origination if you prefer the telecom terminology) voice calling from your application or software.
We support outbound calling to international numbers, provided your account has an international product provisioned. We don’t currently support calling from international numbers.

what are you looking for?

Sign up for our newsletter

Receive our monthly newsletter to stay in touch with the latest QuestBlue news, updates, and special promotions.

Zero spam. Unsubscribe any time.

We serve cookies on this site to analyze traffic, remember your preferences, and optimize your experience. Learn more.