Microsip Api Documentation Jun 2026

MicroSIP supports multiple SIP accounts by repeating parameters with a dash suffix:

However, while the application is feature-rich, its power for developers and system administrators lies not just in its GUI but in its "API"—a term that encompasses several different integration and control methods. This guide will clarify these distinct yet related concepts, providing the documentation and examples you need to effectively use MicroSIP.

[StructLayout(LayoutKind.Sequential)] public struct COPYDATASTRUCT

: Encrypted or plain text credentials (depending on version). 4. Advanced: PJSIP Library Customization

Use Microsoft DDE Spy (from old SDK tools) or a simple VBS: microsip api documentation

For real-time integration without launching new processes, MicroSIP listens for Windows WM_COPYDATA messages. This allows you to control an existing instance from another app (e.g., C#, C++, AutoHotkey, or Python with win32gui ).

to monitor the application window or logs to detect incoming calls for CRM "screen pops."

"C:\Program Files\MicroSIP\MicroSIP.exe" exit

MicroSIP.exe mute # Toggles mute on/off

Official “API” status MicroSIP does not expose a formal, documented application-level API (e.g., an SDK with callback hooks and rich programmatic control) in the way telephony platforms or PBX software might. Instead, integration usually occurs via one or more of these approaches:

| Action | Command ID (Approximate) | | :--- | :--- | | Answer Call | 40001 | | Hangup / Reject | 40002 | | Redial | 40003 |

// Example C/C++ code to send commands HWND hWnd = FindWindow(NULL, L"MicroSIP"); if (hWnd) // Make a call COPYDATASTRUCT cds; cds.dwData = 1; std::wstring number = L"sip:1234567890@domain.com"; cds.cbData = (number.length() + 1) * sizeof(wchar_t); cds.lpData = (PVOID)number.c_str(); SendMessage(hWnd, WM_COPYDATA, (WPARAM)hWnd, (LPARAM)&cds);

For a full list of CLI commands, visit the MicroSIP Help page . to monitor the application window or logs to

The most common API call: initiate a voice call.

If you are building a wrapper or service that tightly couples with MicroSip, you can wrap the CLI executions into native code snippets. Python Example: Automating a Dial Sequence

The application is built on a modular architecture. The central component is the . This class manages the PJSIP library, coordinates all UI components (Dialer, Calls, Contacts), and handles SIP events via callback functions.

is a lightweight, open-source Windows SIP softphone renowned for its minimal resource usage (under 5MB of RAM) and exceptional audio quality. However, its true hidden power lies not in its GUI, but in its Command Line Interface (CLI) and Windows Messaging API . This class manages the PJSIP library