Getstream

The API covers feed groups (flat, aggregated, notification), activities (adding, removing, updating), follow/unfollow operations, and feed retrieval. Agents can add activities to user feeds, manage follow relationships, retrieve enriched timelines with verb-based aggregation, and query notification feeds. The enrichment API enables combining feed data with application object data in a single API call.

Reliability is production-grade for the managed feed infrastructure. GetStream handles the fan-out and feed storage scaling required for applications with large social graphs. Teams using GetStream for primary social features should monitor feed delivery latency and implement appropriate fallback for delayed fan-out during high-traffic periods.

GetStream's activity feed API provides the infrastructure for social features — newsfeed timelines, notification feeds, follow/unfollow social graphs, and fan-out activity distribution — as a managed service. Building scalable fan-out for social timelines is notoriously complex at scale; GetStream abstracts the fan-out, feed storage, and retrieval infrastructure. For agents managing social or community features, the feed API enables programmatic activity publication, social graph management, and personalized timeline retrieval.

Authentication uses API keys and secrets for server-side activity management, with user tokens for client-side feed retrieval. The same key/token model as Stream Chat enables consistent credential management for teams using both products. Tokens are generated server-side and scoped per user for client-side access.

Documentation covers the feed types, activity model, and follow graph clearly. The fan-out and aggregation documentation is useful for teams designing their feed architecture. Teams building social features for the first time will find the feed type documentation (flat vs. aggregated vs. notification) helps clarify the appropriate structure for their use case.