I am experiencing issues with your cart API endpoint “POST /{locale}/cart/add.js”. This request is returning the error “Required parameter missing or invalid: items”. However, I’ve been using this same cart implementation for several years, and the request hasn’t been modified. I double-checked with…

Experiencing the same issue as well

Also experiencing this issue as of this morning.

Experiencing same issue without any changes made.

Same here, did someone solve it? It’s breaking my app.

Experiencing this issue since Saturday, and on a major promotional holiday weekend

POST /{locale}/cart/add Required parameter missing or invalid: items

Tomnaor September 1, 2024, 3:48pm 7

Hey guys, for me the problem was that posthog override the fetch object.

Topic		Replies	Views
404 when using Shopify Cart API Shopify Plus shopify-scripts	1	57	March 29, 2023
Why can't I add products to my cart on my new ecommerce site? Shopify Apps	0	163	May 17, 2022
Required parameter missing or invalid: items Store Design	1	44	April 24, 2022
Required Parameter Missing Or Invalid: Items Shopify Apps	0	16	July 3, 2022
How to add an item to the cart programmatically using API? Technical Q&A shopify-theme	5	965	March 18, 2025