# Available endpoints to extend with ExtendSchema

To see how to add your data to Store API using ExtendSchema, [check this document](./extend-rest-api-add-data.md).

This is a list of available endpoints that you can extend. If you want to add a new endpoint, [check this document](./extend-rest-api-new-endpoint.md).

## `wc/store/cart`

The main cart endpoint is extensible via ExtendSchema. The data is available via the `extensions` key in the response.

### Passed Parameters:

-   `data_callback`: none.
-   `schema_callback`: none.

### Key:

-   `CartSchema::IDENTIFIER`

## `wc/store/cart/items`

The items endpoint, which is also available on `wc/store/cart` inside the `items` key. The data would be available inside each item of the `items` array.

### Passed Parameters:

-   `data_callback`: `$cart_item`.
-   `schema_callback` none.

### Key:

-   `CartItemSchema::IDENTIFIER`

## `wc/store/products`

The main products endpoint is extensible via ExtendSchema. The data is available via the `extensions` key for each `product` in the response array.

### Passed Parameters:

-   `data_callback`: `$product`.
-   `schema_callback` none.

### Key:

-   `ProductSchema::IDENTIFIER`

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