Plugins/MSFT_Plugin_Samples/API/OpenAPISpec_APIKey.yaml

openapi: 3.0.0

info:
    title: httpbin.org
    description: A simple HTTP Request & Response Service.
    version: "0.9.2"

servers:
    - url: https://httpbin.org/

paths:
    /headers:
        get: 
            operationId: TestApiKeyAuth
            summary: Returns the provided headers
            responses:
                200:
                    description: Successful request.