Reqover is language agnostic tool that gives a picture about coverage of APIs based on Open API (Swagger) or GraphQL.
For basic exmple you can user https://petstore.swagger.io
docker run -p 3000:3000 reqover/reqover:latest
Setup API URL, Swagger specification url and save
curl --location --request GET 'http://localhost:3000/v2/pet/9222968140497128105'
Open your browser:
http://localhost:3000/reqover/swagger/report
Report example: