A WebSocket API creates a live channel where both sides can send and receive updates instantly. Unlike traditional APIs that rely on repeated polling, WebSockets maintain a single open connection. This makes them ideal for fast-moving data such as prices, alerts, or live status updates.
Developers use WebSocket APIs when they need low-latency communication. As soon as new data appears on the server, it can be pushed to the client in milliseconds. This reduces bandwidth use and improves responsiveness, especially for trading platforms, dashboards, and applications that show continuous updates.
WebSockets also support event-driven design. Instead of checking for new information, clients subscribe to specific events or data streams. The server sends updates only when needed, making the workflow efficient and scalable even with many users.
WebSocket APIs enable real-time applications by delivering data instantly and efficiently. They help developers build smoother user experiences, especially in markets and environments where speed matters.
A REST API requires clients to send repeated requests to check for new data, while a WebSocket API keeps a persistent connection open. This allows the server to push updates immediately without waiting for a request. WebSockets provide lower latency and lower bandwidth usage for live data. REST remains better for one-time queries and static information. Many applications use both, depending on the task.
Financial markets move quickly, and traders need updates the moment they occur. WebSocket APIs deliver live quotes, order-book updates, and trade events in real time. This supports high-frequency strategies, fast decision-making, and modern trading interfaces. Real-time feeds also help prevent delays that could lead to missed opportunities or stale pricing. The speed and efficiency make WebSockets essential in market-driven tools.
Developers use load balancing, message queues, and connection monitoring to manage thousands of concurrent WebSocket streams. They design systems that can handle reconnects gracefully and distribute data efficiently. Some platforms compress messages or send only incremental updates to reduce bandwidth. Proper scaling ensures real-time performance stays reliable even under heavy load.
A trading app displays live currency prices that update every second. Instead of polling the server dozens of times per minute, it subscribes to a WebSocket feed. New prices stream in immediately, giving users a fluid, real-time experience.
FinFeedAPI’s Currencies API offers real-time FX data that can be integrated into WebSocket-based systems for live dashboards or trading tools.
Developers can stream currency movements instantly, monitor volatility in real time, or display live rate panels without relying on constant REST calls.
This helps build fast, efficient applications where up-to-the-second pricing is essential.
