Create a world

Sign up at onlyworlds.com and create your first world.

Connecting tools — keys and PIN. Mint an API key for your world in the account portal. Keys come in two kinds: ow_w_… (read and write) and ow_r_… (read only). Older 10-digit keys still work and never expire, but new ones are no longer issued — use the prefixed keys above. Each key is scoped to one world.

Your world’s PIN is its wall: any world with a PIN requires it on every write. Prefixed keys (ow_w_ and ow_r_) read without a PIN; older 10-digit keys need the PIN to read a private world. Pass the key and PIN as API-Key / API-Pin headers (or paste them into a tool’s settings).

Build and explore

The full getting-started guide lives at onlyworlds.com/start: which surface fits how you work, how to bring in existing material, and where to go deeper.

The short version: Atlas is the recommended workspace (your world as plain files on your own disk), the Obsidian plugin serves the notes-native, and council is where the schema evolves.

Want to build your own tool — with an AI assistant or by hand? Start at onlyworlds.com/develop.

Find all available tools in the tool directory.