# invalid_request

> The request is not right. Something in the call is missing or wrong. `detail` says what, in plain words.

[Errors](https://docs.wheelmachine.ai/errors/index.html) / `invalid_request`

400, 411, 422 **The request is not right**

Something in the call is missing or wrong. `detail` says what, in plain words.

## When it happens

- A field the API does not know, such as `no field "nmae" here`: a misspelt field is refused, never quietly ignored.
- A value out of its range, such as `cpus is 2, 4, 8 or 16` or `wait_s is between 0 and 600`.
- A body that is not one JSON object.
- A path in a machine that does not begin `home/` or `work/`, or that climbs out with `..`.
- 411: a file written without its length in `Content-Length`.
- 422: an `Idempotency-Key` sent again with a different request.

## What to do

Put the call right as `detail` says. For a 422, give the new request a new `Idempotency-Key`.

**Send it again?** Not unchanged: the same call gets the same answer.

Every code, and how to read a refusal: [Errors](https://docs.wheelmachine.ai/errors/index.html).