A trivial Web API returning SVG image status badges displaying AppVeyor test results: http://teststatusbadge.azurewebsites.net/api/status/{account}/{project}
For instance, with mmaitre314 as account and securestringcodegen as project:
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(https://ci.appveyor.com/project/mmaitre314/securestringcodegen)
Using the markdown:
[
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(https://ci.appveyor.com/project/mmaitre314/securestringcodegen)