Dredd (https://github.com/apiaryio/dredd) is HTTP API Testing Framework.
Dredd reads your API description and step by step validates whether your API implementation replies with responses as they are described in the documentation.
node app.js
# API Blueprint definition
dredd api-description.apib http://127.0.0.1:3000
# Swagger definition
dredd api-description.yml http://127.0.0.1:3000