| Name | Title | Description | Schemas | Dependencies | Health | |
|---|---|---|---|---|---|---|
 | a2a | Agent2Agent (A2A) Protocol | An open protocol enabling communication and interoperability between opaque agentic applications | 9 | - | |
 | apis-json | APIs.json | The API discovery format | 7 | - | |
 | cloudevents | CloudEvents | A specification for describing event data in a common way | 3 | - | |
 | humancellatlas | Human Cell Atlas | An open international collaboration to create comprehensive reference maps of all human cells | 62 | - | |
 | iptc | IPTC | The global standards body of the news media. We provide the technical foundation for the news ecosystem | 14 | - | |
 | jsonld | JSON for Linking Data | Data is messy and disconnected. JSON-LD organizes and connects it, creating a better Web | 2 | - | |
 | jsonschema | JSON Schema | The organisation responsible for the JSON Schema specification | 35 | - | |
 | jsr | JSR | The open-source package registry for modern JavaScript and TypeScript | 1 | - | |
 | manfred | Manfred | The Job Platform for those who are not looking for a job | 4 | - | |
 | modelcontextprotocol | Model Context Protocol (MCP) | An open protocol that standardizes how applications provide context to large language models (LLMs) | 4 | - | |
 | movielabs | Motion Picture Laboratories | A Technology Joint Venture of the Major Hollywood Studios | 1 | - | |
 | nasa | National Aeronautics and Space Administration | The United States' government agency responsible for leading advancements in space exploration, scientific discovery, and aeronautics research | 153 | - | |
 | octue | Octue | Software developer for the renewables industry | 3 | - | |
 | ossf | Open Source Security Foundation | A community of software developers and security engineers who are working together to secure open source software for the greater public good | 20 | - | |
 | sdf | Semantic Definition Format (SDF) | A format for domain experts to use in the creation and maintenance of data and interaction models that describe Things | 2 | - | |
 | sony | Sony | Sony Group Corporation | 1 | - | |
 | sourcemeta | Sourcemeta | A provider of premium tooling and services to support JSON Schema use in production | 1197 | - | |
 | w3c | World Wide Web Consortium | The international community that develops open standards to ensure the long-term growth of the Web | 3 | - |
Special directories
| Name | Title | Description | Schemas | Dependencies | Health | |
|---|---|---|---|---|---|---|
| self | Self | The schemas that define the current version of this instance | 28 | - |