REST Client & API Testing

Search for REST Client by Huachao Mao in the Extensions view. Create a file with the .http or .rest extension to start writing requests.

Define reusable variables and environment-specific configs in settings.json:

"rest-client.environmentVariables": {
  "dev": { "host": "localhost:3000" },
  "prod": { "host": "api.example.com" }
}

Save responses and use values from them in subsequent requests:

# @name login
POST {{host}}/auth/login

###
GET {{host}}/profile
Authorization: Bearer {{login.response.body.token}}

Thunder Client is another popular extension that provides a GUI (similar to Postman) for API testing inside VS Code. It stores request collections in .json files you can commit to your repo.