api-tier-architecture

Real-time data access across web and mobile using Convex is handled through a 3-tier API architecture that utilizes Convex WebSocket for live web updates, SSE for mobile streams, and REST for reliable fallbacks.

A DAL pattern is a Data Access Layer that enforces ownership, validation, and consistent response envelopes. You need it for cross-platform API architecture to ensure secure, scalable server access and avoid direct client Convex calls.

Build a hybrid data hook by applying platform detection to evaluate client capabilities, then automatically switch data fetching strategies between Convex WebSocket, SSE, and REST based on the detected context and connection reliability.

Yes, the 3-tier API architecture works for offline mobile clients by providing robust REST fallbacks that ensure reliable data fetching when WebSocket or SSE connections are unstable or unavailable.

You should avoid direct client Convex calls in your API architecture to enforce authenticated server paths, ensuring that the DAL layer properly handles data ownership, validation, and secure access control across all platforms.

Yes, you can use SSE for near-real-time updates on mobile devices, as the 3-tier architecture employs SSE specifically for mobile streaming scenarios while reserving Convex WebSocket for full real-time web desktop synchronization.