# OnlyWorlds Docs

[Build an app](/docs/development/packages)
  [Connect an agent](/docs/development/ai)
  [Understand the schema](/docs/schema/)
  [Build a world without code](https://www.onlyworlds.com/start)
## Quickstart

List the Characters in Hyperion, the public example world. Its demo key `0000000000` is read-only and reads without a PIN; Moppetopia's demo key is listed on [Keys and PINs](/docs/getting-started/keys#demo-keys).

```bash
curl -H "API-Key: 0000000000" \
  "https://www.onlyworlds.com/api/v2/character/?fields=id,name"
```

```json
{
  "data": [
    { "id": "068e92dc-10ec-7225-8000-7efd678bd862", "name": "Mr. Steinway" },
    { "id": "068e92db-4c40-79eb-8000-8ef44c0d52b4", "name": "Rachmaninov" },
    { "id": "068e2ddb-83c6-71a7-8000-a45b8b711e25", "name": "The Consul" }
  ],
  "has_more": false,
  "next_cursor": null
}
```

Swap in a key for your own world and the same call reads it. [Getting Started](/docs/getting-started/) walks through keys and the first write.

Looking for tools to build a world with, rather than to build on? Start at [onlyworlds.com/start](https://www.onlyworlds.com/start), or open [Atlas](https://atlas.onlyworlds.com).