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

# Errors

> HTTP status codes the API returns and what they mean.

The API uses standard HTTP status codes. Bodies follow FastAPI's shape — a `detail`
field describing the problem.

| Status | Meaning              | Common cause                                                     |
| ------ | -------------------- | ---------------------------------------------------------------- |
| `200`  | OK                   | Request succeeded.                                               |
| `401`  | Unauthorized         | Missing, malformed, unknown, revoked, or expired API key.        |
| `403`  | Forbidden            | The key lacks the scope required for this endpoint.              |
| `404`  | Not found            | The record doesn't exist **or belongs to another organisation**. |
| `422`  | Unprocessable entity | A query parameter failed validation (e.g. `limit` over 100).     |
| `429`  | Too many requests    | You exceeded the [rate limit](/rate-limits).                     |

## A note on `404`

Requesting a record that belongs to a **different organisation** returns `404`, not `403`.
This is deliberate: it prevents callers from probing which IDs exist outside their own org.
From your key's perspective, anything outside your organisation simply does not exist.

## Example

```json theme={null}
{
  "detail": { "code": 404, "message": "Not found", "data": {} }
}
```

<Tip>
  A `401` right after creating a key usually means the `Authorization` header is wrong.
  It must be exactly `Token token=ei_live_...` — not `Bearer ...`.
</Tip>