Magento 2 rest API add bundle product in the cart

Question

Magento 2.4.6 REST API – Bundle Product Cart Issue

I'm using the Magento 2.4.6 REST API to add a bundle product to the guest cart.

Create Quote POST /rest/V1/guest-carts Response (quote_id): test

Add Bundle Product to Cart POST /rest/V1/guest-carts/{{quote_id}}/items Payload:

{
 "cartItem": {
 "sku": "MK-bundle",
 "qty": 1,
 "quote_id": "test",
 "product_option": {
 "extension_attributes": {
 "bundle_options": [
 { "option_id": 15, "option_qty": 1, "option_selections": [63] },
 { "option_id": 16, "option_qty": 1, "option_selections": [66] }
 ]
 }
 }
 }
}

Response: Product added successfully with correct data.

Issue: When trying to fetch cart items or totals using:

GET /rest/V1/guest-carts/{{quote_id}}/items

GET /rest/V1/guest-carts/{{quote_id}}/totals

I get this error:

"The product that was requested doesn't exist. Verify the product and try again." Since the item is added successfully, why is this error occurring when fetching cart data? How can I correctly retrieve the cart items?

how to solve this or how we can add bundle products in the cart ?

Answer 1

To add a bundle product to a guest cart in Magento 2 via REST API:

Create a guest cart

POST /rest/V1/guest-carts → returns cartId.

Get bundle options

GET /rest/V1/bundle-products/{sku}/options/all

→ use option_id and product_links.id from response.

Add bundle to cart

POST /rest/V1/guest-carts/{cartId}/items
{
 "cartItem": {
 "quote_id": "{cartId}",
 "sku": "MK-bundle",
 "qty": 1,
 "product_option": {
 "extension_attributes": {
 "bundle_options": [
 { "option_id": 15, "option_qty": 1, "option_selections": [63] },
 { "option_id": 16, "option_qty": 1, "option_selections": [66] }
 ]
 }
 }
 }
}

Use GET /rest/V1/guest-carts/{cartId}/items and /totals

Ensure all option_id and option_selections are correct—errors occur if they’re missing or invalid.