Does Webflow have endpoints to add products to the cart via E-commerce API?

Yes, Webflow does have endpoints to add products to the cart via the E-commerce API. The E-commerce API allows developers to interact with the Webflow E-commerce functionality programmatically. By utilizing the API endpoints, you can integrate and customize various e-commerce features on your website or application.

To add products to the cart via the E-commerce API, you'll need to make a POST request to the appropriate endpoint. First, you'll need to retrieve the ID of the product variant you want to add to the cart. You can do this by making a GET request to the API endpoint that fetches all the products or a specific product.

Once you have the variant ID, you can include it in your POST request to the cart endpoint. Typically, the endpoint for adding products to the cart is something like: `/v1/carts/{cart_id}/items`. In the request body, you'll include the variant ID, quantity, and any other relevant details.

Here's an example of how a POST request to add a product to the cart via the E-commerce API might look like:

```
POST /v1/carts/{cart_id}/items HTTP/1.1
Host: api.webflow.com
Authorization: Bearer {your_api_key}
Content-Type: application/json

{
"variantId": "{variant_id}",
"quantity": 1,
"properties": {
"size": "XL",
"color": "Blue"
}
}
```

In the example above, you'll need to replace `{cart_id}` with the ID of the cart you want to add the product to, `{your_api_key}` with your actual API key, and `{variant_id}` with the ID of the specific product variant you wish to add.

Remember to include the necessary authorization header with your API key to authenticate the request.

By making this API call, the specified product variant will be added to the cart with the specified quantity. You can also include additional properties, such as size or color, as shown in the example.

It's worth mentioning that the Webflow E-commerce API documentation provides more detailed information on the available endpoints, request/response structures, and authentication methods. Make sure to refer to the official documentation for the most up-to-date and accurate instructions.