6 COMMON WAYS TO BUILD APIS
There are 6 common ways to build APIS
6 COMMON WAYS TO BUILD APIS
REST
What it is: Representational State Transfer; a stateless, resource-based approach using HTTP.
How it works: A client (often a browser or app) sends HTTP requests to a server; the server responds with resources (usually in JSON or XML).
Key details from the diagram:
Client and server exchange HTTP requests and responses.
Emphasizes the request/response model over a single connection.
GraphQL
What it is: A query language and runtime for APIs that lets clients request exactly the data they need.
How it works: A client talks to a GraphQL server (often via HTTP) which queries a graph of services/databases; the server resolves the query and returns precisely the requested data.
Key details from the diagram:
Client communicates with a central GraphQL node (often a gateway) that routes to multiple backend services or databases (depicted as a cluster of servers).
Flexible data retrieval in a single request, reducing over-fetching.
WebSocket
What it is: A protocol that provides a persistent, full-duplex connection between client and server, enabling real-time communication.
How it works: After an initial handshake over HTTP, a single long-lived connection is kept open, allowing both sides to send messages anytime.
Key details from the diagram:
Shows a client establishing a web socket connection to the server, then messages flow back and forth over the same connection.
gRPC
What it is: A high-performance RPC framework built on HTTP/2 with protocol buffers (protobuf) for serialization.
How it works: A gRPC client makes a “proto req” to a gRPC server, which returns a “proto res.” Multiple servers can be involved behind a gRPC server.
Key details from the diagram:
Client -> Proto Req -> Proto Res -> GRPC Server, with a chain-like flow to multiple nodes.
MQTT
What it is: A lightweight publish/subscribe messaging protocol designed for low-bandwidth, high-latency or unreliable networks (IoT).
How it works: There are publishers (devices producing messages), subscribers (clients consuming messages), and a broker that routes messages based on topics.
Key details from the diagram:
Shows a broker in the center connected to publishers and subscribers via topics.
Serverless
What it is: An execution model where you run code in response to events without managing servers (functions-as-a-service).
How it works: A client makes a request (REQ); the system triggers a serverless function (API) that processes the request and returns a response (RES).
Key details from the diagram:
Shows a client calling an API, which is implemented via serverless functions. The API is managed by a platform (no server you manage directly).
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