The 52°North Series API provides a thin access layer to series datasets via RESTful Web binding. It provides different output formats like json, pdf or png.
Query the sensor status and get all the metadata you want with a simple REST interface. It is lightweight and can be utilized in many workflows. For example you can get a list of platforms.
Plot the highly customizable graphs and use it within your apps.
The all sorts of sensor data can be queried with a Sensor REST-API. See the docs for a complete reference.