> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sentfrom.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

> API keys, the base URL, and how requests are authenticated.

## Base URL

```
https://api.sentfrom.ai/v1
```

All product endpoints live under `/v1`. Requests and responses are JSON.

## API keys

SentFromAI authenticates with a **Bearer API key**. Create and revoke keys from the
[dashboard](https://console.sentfrom.ai) under **API keys**. A key looks like:

```
sf_live_3Sg…
```

Pass it on every request:

```bash theme={null}
curl https://api.sentfrom.ai/v1/inboxes \
  -H "Authorization: Bearer sf_live_…"
```

<Warning>
  Keys grant full access to your workspace's inboxes and mail. **Never** ship a
  key in client-side code or commit it to source control. Store it in an
  environment variable or a secrets manager.
</Warning>

## Key management

* **Multiple keys** per workspace — issue a separate key per service or environment.
* **Rotate freely** — create a new key, roll it out, then revoke the old one. Revocation is instant.
* **Last-used tracking** — the dashboard shows when each key was last seen, so stale keys are easy to spot.

## Errors

A missing or invalid key returns `401`:

```json theme={null}
{ "error": "invalid token" }
```

See [Error handling](/guides/errors) for the full list of status codes.