Mongoose Embedded Web Server Library - Mongoose is more than an embedded webserver. It is a multi-protocol embedded networking library with functions including TCP, HTTP client and server, WebSocket client and server, MQTT client and broker and much more.
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Latest commit c722cfe Oct 22, 2016 @alashkin alashkin committed with cesantabot Fix c++11 mg compilation

Mongoose - Embedded Web Server / Embedded Networking Library

Mongoose is ideal for embedded environments. It has been designed for connecting devices and bringing them online. On the market since 2004, used by vast number of open source and commercial products - it even runs on the International Space station! Mongoose makes embedded network programming fast, robust, and easy.

Looking for a complete IoT solution with firmware and cloud components? Check out Mongoose IoT Firmware and Cloud.



  • Cross-platform: works on Linux/UNIX, MacOS, QNX, eCos, Windows, Android, iPhone, FreeRTOS (TI CC3200, ESP8266), etc
  • Supported hardware platforms: TI CC3200, TI MSP432, NRF52, STM32, PIC32, ESP8266, ESP32 and more
  • Builtin protocols:
    • plain TCP, plain UDP, SSL/TLS (over TCP, one-way or two-way)
    • HTTP client, HTTP server
    • WebSocket client, WebSocket server
    • MQTT client, MQTT broker
    • CoAP client, CoAP server
    • DNS client, DNS server, async DNS resolver
  • Single-threaded, asynchronous, non-blocking core with simple event-based API
  • Native support for PicoTCP embedded TCP/IP stack, LWIP embedded TCP/IP stack
  • Tiny static and run-time footprint
  • Source code is both ISO C and ISO C++ compliant
  • Very easy to integrate: just copy mongoose.c and mongoose.h files to your build tree


Mongoose is released under Commercial and GNU GPL v.2 open source licenses.

Commercial Projects: Contact us for commercial license.

Dashboard Example

Mongoose is often used to implement device dashboards and real-time data exchange over Websocket. Here is a dashboard example that illustrates the functionality:

Developing a new product? Contact us today to discuss how Mongoose can help.


To submit contributions, sign Cesanta CLA and send GitHub pull request. You retain the copyright on your contributions.

Looking for a pre-compiled Mongoose web server Windows or Mac binary?