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

# Bad Request

> The request is malformed or contains invalid parameters

## Cause

The request cannot be processed due to malformed syntax, invalid parameters, or missing required fields.

## Fix

Review the request format and ensure all required parameters are provided with valid values.

## Retry safety

Not retryable until the underlying state or request changes.

## Raised by

Many operations return this problem. Check the error responses on the operation you called.

Examples:

* [Create an appointment](/api-reference/appointments/create-an-appointment)
* [Get an appointment](/api-reference/appointments/get-an-appointment)
* [Patch an appointment](/api-reference/appointments/patch-an-appointment)
* [Authorize an appointment payment](/api-reference/appointments/authorize-an-appointment-payment)
* [Get an appointment calendar event](/api-reference/appointments/get-an-appointment-calendar-event)

## Example

```json theme={null}
{
  "type": "https://docs.guile.app/problems/badRequest",
  "title": "Bad Request",
  "status": 400,
  "detail": "The request cannot be processed due to malformed syntax, invalid parameters, or missing required fields."
}
```