CPaaS — Programmable Communication APIs
Voice API & Programmable Voice
NobleStack's Voice API turns every application into a communication channel. With a few lines of code, your product, CRM, or internal tool can place and receive calls, run interactive menus, mask numbers for privacy, and record conversations — all backed by carrier-grade infrastructure and India-wide plus international connectivity.
Click-to-callIVRMaskingRecording
Programmable voice, built for developers
Our programmable voice platform gives your engineering team full control over the call lifecycle through clean REST APIs and real-time webhooks. Whether you are building click-to-call inside a web app or an automated reminder system that reaches thousands of customers, the Voice API scales with your business without you managing a single telephony server.
Key capabilities
- Click-to-call and in-app calling using REST APIs, SIP, and WebRTC
- Programmable IVR flows configured in code, with DTMF input capture
- Number masking and call anonymisation to protect customer and agent privacy
- Automatic call recording with secure cloud storage and retrieval
- Real-time call control — bridge, transfer, hold, and conference on the fly
- Global and India-wide call termination with virtual and DID numbers
- Detailed call detail records (CDRs) and delivery analytics via API
- Webhooks for live call events so your systems always stay in sync
Why businesses choose the NobleStack Voice API
- High-availability infrastructure engineered for consistent call quality
- Transparent, usage-based pricing that scales from startup to enterprise
- Clear documentation, SDKs, and sandbox access for fast integration
- Security-first design with encryption in transit and access controls
Popular use cases
- Privacy-protected calling for cab, delivery, and marketplace platforms
- Automated appointment and payment reminders at scale
- Customer-support callbacks triggered directly from your CRM
- Two-factor voice verification as a fallback to SMS OTP