November 2026

OpenAPI Specification

•General· Listed by a fan

OpenAPI is a standard for describing HTTP APIs in a machine-readable form. An API description records operations, parameters, request and response structures, and other interface details so people and tools can understand a service. It supports documentation, client generation and integration tooling across programming languages. This listing identifies the specification rather than a particular API platform, editor or hosting service.

JSON Schema

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JSON Schema is a vocabulary for describing and validating the structure of JSON data. It lets developers specify expected properties, data types and constraints, helping applications exchange consistent information and reject invalid inputs. The project website provides learning material, specifications and implementation resources. It is a standard used by validation tools and applications, rather than a hosted database or a single software product.

Atom Syndication Format

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Atom is an XML-based syndication format for web feeds, defined in RFC 4287. It provides a standard way to represent a feed and its entries, including identifying information, authors, dates and linked content. Publishers and feed-reader developers can use the specification to exchange updates consistently. The RFC is the technical reference for the format; using Atom requires a publishing system or reader that implements it.

ActivityPub

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ActivityPub is a W3C standard for decentralised social networking. It describes how clients interact with social services and how independently operated servers exchange activities, enabling federated publishing and social interactions. The official specification is useful for developers building compatible social platforms or understanding federation. It defines the protocol rather than operating a social network or providing a ready-made application.