These approaches solve different communication problems and often belong in the same system. Start with the direction and timing of the data flow.

Choose REST for clear resource operations

REST is a dependable default for public APIs, CRUD workflows, and integrations that benefit from HTTP caching and conventional tooling.

Choose GraphQL for varied client data needs

GraphQL helps when several clients need different shapes of related data. It also adds schema governance, query-cost controls, resolver performance work, and more complex caching.

Choose webhooks for server-to-server events

Sign every request, include a stable event identifier, retry with backoff, and expect duplicate or out-of-order delivery. Receivers should acknowledge quickly and process work asynchronously.

Choose realtime transport for live interaction

WebSockets or server-sent events fit chat, presence, collaborative editing, live tracking, and operational dashboards. Plan for reconnects, missed-event recovery, and authorization.

A simple decision sequence

• Does a client request a resource or command? Start with REST
• Do several clients need highly variable connected data? Evaluate GraphQL
• Must one server notify another after an event? Use a webhook
• Must an open screen update within seconds? Use SSE or WebSockets

Prefer the smallest number of communication styles that satisfies the product.