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

# missing_required_parameter

> HTTP 400 — Required field is absent from the request.

## HTTP status

`400 invalid_request_error`

## Typical cause

A required request field is absent. The `param` field on the response names the missing field.

## Resolution

Add the named parameter to the request payload and retry.