OnlyWorlds is open source, license free, and encourages developers to use its infrastructure and tools for integration into existing or new tools. Feedback, co-development and other contributions from developers are appreciated.

Schema Repo

Primary GitHub repo with the core schema specifications (in YAML) and contribution guidelines

API Platform

API details for world data exchange

Packages

NPM and Python SDKs

AI integration

Custom GPTs and MCP server to enable AI-powered development

Technical Notes

Identifiers: onlyworlds currently uses UUIDv7 for world and element IDs

Format: JSON API with YAML schema definitions

Authentication: API-Key and API-Pin headers for all requests

Discovery: Listed in Context7 library for documentation search