Communication APIs
Programmable Communication at Scale
Your telecom infrastructure should be accessible to every developer on your team, not just the ones who know SIP. We build the API layers that abstract protocol complexity into clean, documented interfaces for voice, SMS, and video.
What We Build
API Development Services
Each type of communication channel requires a different API approach. We cover all of them.
Voice APIs
Voice features shouldn't require SIP expertise to build. Programmable interfaces that abstract the complexity of SIP, RTP, and codec negotiation behind clean, developer-friendly REST and WebSocket APIs.
- Outbound and inbound call control
- Call recording, transcription, and playback
- Conference bridges and multi-party calling
- DTMF detection and IVR flow execution
- Real-time call event webhooks
- Number provisioning and porting APIs
SMS and Messaging APIs
Scale messaging operations without building compliance infrastructure from scratch. High-throughput APIs for SMS, MMS, and OTT channels with delivery receipts, number management, and compliance controls built in.
- SMS and MMS sending and receiving
- Short code and long code provisioning
- Delivery receipt and status callbacks
- Message queuing and rate limiting
- Opt-in/opt-out and compliance management
- Campaign registry integration (10DLC, A2P)
Video and WebRTC APIs
Add video calling to any browser or mobile application without managing media servers. Real-time video APIs leveraging WebRTC for browser-native experiences, with server-side media processing for recording, compositing, and streaming.
- Peer-to-peer and SFU-based video rooms
- Screen sharing and media injection
- Server-side recording and compositing
- Bandwidth estimation and adaptive bitrate
- SRTP encryption and oAuth-based room access
- Live streaming to RTMP endpoints
CPaaS Platform Development
Turn your telecom infrastructure into a product developers can subscribe to. Full CPaaS platform engineering covering API gateway design, developer console, documentation portals, SDK generation, and usage-based billing.
- API gateway and authentication layer
- Developer console and API key management
- SDK generation for multiple languages
- Interactive API documentation (OpenAPI)
- Usage metering and billing integration
- Sandbox environments for developer testing
Architecture
What Production-Ready APIs Actually Require
An API can pass every test in staging and still fall apart in production. The difference is usually in the architecture, not the code.
API Gateway and Routing
One entry point that handles routing, authentication, and rate limiting without exposing the underlying complexity. Centralized protocol translation between REST, WebSocket, and SIP signaling layers.
Event-Driven Architecture
Your systems stay in sync with call events and delivery receipts without polling. Asynchronous event processing via message queues and webhooks at any scale.
Media Server Integration
Recording, transcoding, and real-time audio manipulation without building the media layer yourself. Deep integration with FreeSWITCH, Asterisk, and Janus.
Horizontal Scalability
Traffic growth doesn't require rearchitecting. Stateless API layers backed by distributed session stores that scale horizontally to handle millions of concurrent calls.
Security and Compliance
Security and compliance requirements met at every layer. TLS throughout, API key and OAuth2 authentication, request signing, PCI DSS considerations, and GDPR-compliant data handling.
Observability and Monitoring
Problems surface before they reach users. Structured logging, distributed tracing, and real-time metrics dashboards for API latency, error rates, and throughput across all services.
How It Connects
Integration Patterns
The API should fit your system, not the other way around. Multiple integration patterns ensure it can.
Webhook Delivery
Events reach your system reliably, even during downtime. Retry logic, signature verification, and dead-letter queues for missed events, with filtering and per-endpoint configuration.
Streaming APIs
Real-time communication state without polling. WebSocket and Server-Sent Events for call updates, live transcription streams, and presence notifications.
Batch and Bulk Operations
High-volume jobs run without blocking your system. Bulk messaging, batch number provisioning, and async job processing with progress tracking and result callbacks.
Third-Party Integrations
Communication events flow to the tools your business already uses. Pre-built connectors for CRM platforms (Salesforce, HubSpot), helpdesks (Zendesk, Freshdesk), and business tools (Slack, Microsoft Teams).
Developer Experience
APIs Developers Actually Want to Use
APIs are only as good as the experience of using them. Developers move faster when the tooling around the API does the heavy lifting.
OpenAPI Specs
Documentation, SDKs, and tests stay current automatically. Machine-readable API definitions that drive the full developer toolchain.
Multi-Language SDKs
Developers work in their own language without writing their own client code. Official libraries for Python, Node.js, Go, Java, and .NET, generated from the API specification.
Sandbox Environments
Development and QA without live traffic costs or risk. Isolated test environments with simulated network conditions for realistic testing.
Interactive Docs
Developers can try the API before writing a line of code. Documentation portals where live API calls can be made and responses seen directly in the browser.
Frequently Asked Questions
Need a Communication API?
Tell us what you're building and we'll help you figure out the right API layer.
Related Services
VoIP Software Development
Custom softswitch, SBC, and billing platform engineering that provides the telecom backbone your APIs connect to.
Web and App Development
Full-stack portals, dashboards, and mobile apps that consume your communication APIs and serve end users.
AI Voice Agents
Intelligent conversational AI agents that leverage your voice APIs for automated customer interactions.