Synse Server

Synse Server provides a simple JSON API to monitor and control physical and virtual devices. It provides a uniform HTTP interface for back-end plugins implementing various protocols, such as IPMI, SNMP, and Modbus-over-IP. The Synse Server API makes it easy to read from and write to devices, gather device meta-information, and scan for devices across multiple back-ends through a curl-able interface.

Synse Server is created and maintained by Vapor IO under the GPL v3.0 license, and can be found on GitHub.


  • Simple curl-able JSON API
  • Asynchronous request processing
  • Plugin architecture allows Synse Server to interface with any kind of device
  • Internal gRPC API allows for plugins written in any language
  • Read from devices
  • Write to devices
  • Enumerate all devices managed by plugins
  • Get meta information on all devices
  • Dockerized for scalability and deployability
  • Securable via TLS/SSL


Synse Server is a micro-service that provides an HTTP interface for interaction and control of devices. Synse Server does not directly interface with the devices – that job is left to the plugins that Synse Server can interface with. Plugins implement a given protocol to talk to a given collection of devices, whether that is a serial protocol for sensors, or an HTTP protocol for some external REST API is up to the plugin implementation.


Synse Server really acts as the front-end interface for all the different protocols/devices. It gives a uniform API to the user, routes commands to the proper device (e.g. to the plugin that manages the referenced device), and does some aggregation, caching, and formatting of the response data.

The general flow through Synse Server for a device read, for example, is:

  • get an incoming HTTP request
  • validate the specified device exists
  • lookup the device’s managing plugin
  • dispatch a gRPC read request to the plugin for that device
  • await a response from the plugin
  • take the data returned from the plugin and format it into the JSON response scheme
  • return the data to the caller

User Guide

The official guide for using Synse Server. This section goes over various topics useful to the user, from getting it to deploying it. With this information, you should be able to make the most out of Synse Server however you decide to use it.

Community Guide

Learn about the Synse Server ecosystem and community. This section outlines the community guidelines, provides license info, and details how to contribute to Synse Server.


Learn about the development process for Synse Server. If you want to contribute to, play around with, or fork Synse Server, this section will familiarize you with the development workflow, testing practices, and debugging process.