# Privacy and costs

> What is sent where, what costs money and where your files are kept.

## What leaves your machine

Model Hub sends your prompts, and any note text you or a plugin include, only to the providers you add.

| Where | When | What is sent |
|---|---|---|
| OpenRouter (`openrouter.ai`) | You added OpenRouter and a call uses one of its models | The prompt and included text; requests for its model list and prices |
| Anthropic (`api.anthropic.com`) | You added Anthropic and a call uses a Claude model directly | The prompt and included text |
| TypeSafe (`api.typesafe.ai`) | You added TypeSafe and a plugin makes a decision call | The decision's text |
| Ollama or LM Studio | You added one | The prompt, to the server on your own computer |
| Another endpoint | You added it | The prompt, to the address you entered |
| Your OpenTelemetry collector | You turned on **Send traces** | The role, model, tokens and cost of each call; never your text |

Web research sends your question to the provider's web search.

Nothing is sent to the plugin's author. There is no telemetry, no account with us and no ads.

In the note chat, the chip under the header shows whether the open note goes with your question. With a selection, the whole note is sent too.

## What costs money

- **OpenRouter, Anthropic and TypeSafe** bill your account with them for each call. Model Hub is free; the label on its listing is *Optional payments* because of these services.
- **Ollama and LM Studio** cost nothing per call.
- To cap spending, set **Per call** and **Per month** on each tier: see [Set up tiers and limits](tiers-and-limits.md). Both are checked before a call is sent.
- To see spending, open the usage view: see [See what you spent](usage-and-costs.md).

## Where things are kept

| What | Where |
|---|---|
| API keys | Obsidian's keychain. Never in the settings file. |
| Settings (providers, tiers, roles) | `data.json` in the plugin's folder, inside your vault's configuration folder |
| The ledger of calls | `ledger.jsonl` in the same folder |
| Your skills | The vault folder you name under **Skills folder** |

Model Hub reads and writes nothing outside your vault, and runs no other programs.