2dChart.com is a simple chart image generator with url parameters.
Sample url
<https://api.2dchart.com/v1/type=line/width=640/height=550/labels=["Jan","Feb","Mar","Apr","May","Jun","Jul"]/"a-heading"=[13,51,29,21,-15,39,58]/"b-head"=[3,21,19,41,-5,19,56]/"c-head"=[13,14,9,21,5,9,36]/>
Chart Type:
type=line
type=bar
Dimensions:
width = 500
height = 500
Labels/Legend/X-axis:
labels=["Jan","Feb","Mar","Apr","May","Jun","Jul"]
Datasets:
"a-heading"=[13,51,29,21,-15,39,58]