ActivityPubinspired

ActivityPubinspired refers to software, frameworks, and architectures that are influenced by the ActivityPub protocol and its concepts. It denotes systems that adopt the federated, user-centric model of ActivityPub and may implement the Activity Streams 2.0 vocabulary, actor objects, and HTTP-based interaction patterns, while varying in degree of formal standard compliance.

Core concepts include a decentralized network of servers that exchange activities via inbox and outbox endpoints, using actors (users and services) and activities such as Create, Update, Like, Follow, and Announce. Data models are typically expressed in JSON-based formats, enabling interoperability across implementations.

Scope and variations: Some projects implement the full ActivityPub protocol; others adopt only its architectural ideas—federation, content distribution, and moderation—without strict standard conformance. The approach is often applied to social networking, content hosting, or collaborative apps, with trade-offs in complexity and interoperability.

Examples: Mastodon, Pleroma, Misskey, PeerTube, and Friendica are widely known platforms that embody ActivityPub-inspired federation; they illustrate different design choices within the same paradigm.

Relation to standard: ActivityPubinspired design aims for interoperability and federation while allowing divergence for practicality, with attention to security, identity, and moderation in a federated environment.