Custom 3CX API Development

We build robust RESTful and real-time WebSocket (SignalR) APIs that allow your CRM or application to fully control 3CX PBX functions.

What You Get

HTTP REST backend with endpoints for make/answer/transfer calls, manage IVRs, users, extensions, recordings and more.
Optional SignalR listener service for real‑time call state updates and event delivery.
Documentation and well‑commented codebase.
Support for CDR, CFD and custom softphone integration.
Source code delivery and deployment guidance.

Technology & Expertise

Built using ASP.NET/C# or Node.js depending on your stack. We focus on performance optimization, security, and maintainability.

Use Cases

Click‑to‑dial from CRM records.
Real‑time call logging and analysis.
Automated call routing and IVR control.
Integration with external databases and services.

Getting Started

An 8SC+ Enterprise 3CX license is required. Provide API key obtained from the 3CX Admin Console. We'll handle the integration and provide sample client code.

Service Tiers & Add‑Ons

We offer multiple tiers to match your needs:

Starter – Basic integration with source code and 3 revisions.
Standard – Includes detailed comments and up to 5 revisions.
Advanced – Full customisation, unlimited revisions and priority support.

Add‑ons include:

Click-to-call support (+1 day)
Call history logging (+800)
Call recording integration (+500)
Fast delivery options and training packages

Why Choose Our 3CX Solutions?

Stable, fast, and extensible APIs built in C# or Node.js.
Performance and security optimisations suitable for enterprise use.
Clear documentation and code that you (or future teams) can maintain.
Flexible architecture supporting CDR, CFD and softphone integrations.
Requirement gathering, sprint‑based delivery plans, and QA support.

Workflow & Project Approach

Most projects follow a multi‑sprint plan (8–10 weeks) covering:

User and call management, core call functionality, in‑call experience.
Real‑time call logging, monitoring dashboards, agent break management.
Reporting, escalations, and intervention features.
Internal QA, bug fixing, followed by UAT and deployment.

We work closely with your CRM administrators, QA engineers and DevOps staff to align the integration with your business processes and compliance needs.

Frequently Asked Questions

Is 3CX deployed on Windows supported? Yes.
Is 3CX deployed on Linux supported? Yes.
Do I need an Enterprise license to integrate? No, but an 8SC+ Enterprise license is required for Call Control API.
Can I get an API for older 3CX versions? We can support most versions; contact us with details.
Can I listen to SignalR from Node.js or non‑Microsoft stack? Yes, we can design cross-platform listeners.
Can I automate calls while agents use web clients? Absolutely; our API supports concurrent web client activity.