# Sources

## What is a source?

Everything Vistazo shows is read from a source. There are three kinds. A widget, a notebook cell and
the built-in assistant read each of them the same way, and every read is read-only. **Settings → Connections** lists all three.

## What kinds of source are there?

| Kind | What it is | Where it comes from |
|---|---|---|
| [Connections](/docs/data/connections) | A data source of your own, served over MCP | You connect it under **Settings → Connections** |
| [Curated sources](/docs/data/curated-sources) | Five public sources Vistazo hosts and keeps current, with no account or key | Included in every workspace |
| [Datasets](/docs/data/datasets) | A table Vistazo read out of a file you uploaded | Made when you attach a file in a chat, or when your agent uploads one |