# Update participant info for cart item

Use this endpoint to provide info for each participant in a cart item.

Cart items which do not require participant info will return a 404 status code.

The exact properties for each participant info vary depending on the cart item requirements.

Endpoint: PUT /carts/{cartUuid}/items/{cartItemUuid}/participants
Version: 3.5.0

## Path parameters:

  - `cartUuid` (string, required)
    The UUID of the cart.

  - `cartItemUuid` (string, required)
    The UUID of the cart item.

## Header parameters:

  - `X-Musement-Application` (string)
    A partner's application value, used for analyzing API usage and to identify areas of improvement.

  - `X-Musement-Version` (string)
    The API version to use for the request.

When absent, the latest version is used by default, however the latest version may not be stable. Partners are encouraged to use the latest stable version: 3.4.0.
    Example: "3.4.0"

## Response 404 fields (application/json):

  - `code` (string, required)
    The internal Musement code for the error.
    Example: "1400"

  - `message` (string, required)
    A message with a brief explanation of the error.
    Example: "This cart item does not require participant info"

## Response 423 fields (application/json):

  - `code` (string, required)
    The internal Musement code for the error.
    Example: "-1"

  - `message` (string, required)
    A message with a brief explanation of the error.
    Example: "Cart is already connected to order with state 'closed'"

## Response default fields (application/json):

  - `code` (string, required)
    The internal Musement code for the error.
    Example: "0"

  - `message` (string, required)
    A message with a brief explanation of the error.
    Example: "There was an error"