REST, GraphQL, and gRPC are 3 popular forms client-server and server-to-server communication. Choosing can be difficult, so this concise guide can help. In each section, an example will be provided to illustrate retrieving a user. REST Notes HTTP paths describing data, e.g. /users as a collection of users Easily discoverable data, e.g. user ID 3 would be at /users/3. All of the CRUD (Create Read U