Facebook vs Slack

Meta's Graph API is the single HTTP interface behind Facebook Login, Page management, and Social Plugins, exposing versioned endpoints under graph.facebook.com that read and write data about people, Pages, and Groups once a user grants OAuth permissions. Most scopes that touch another person's data or a business Page require Meta's app review process before they work outside development mode, and the same Graph API infrastructure also underlies Instagram's Business API stack.

Slack's Web API lets registered apps read and post messages, manage channels, and react to workspace events, authenticated with OAuth 2.0 bot or user tokens scoped to a single Slack workspace. Methods are rate-limited across four tiers and most write actions cap out around one request per second per workspace, so high-throughput integrations typically move to the Events API or Socket Mode instead of polling.