We have been receiving more and more complaints of merchants seeing their cart crash due to 429 errors, not only on the /cart/add.js and other mutation endpoints, but on the /cart.js endpoint as well. The issue is particularly visible when connecting through a VPN (I have used NordVPN P2P connectio…

429 errors affecting real shoppers have been resolved. The remaining issue is CLI-specific, and we’re still working on a proper fix. Thanks to @bakin11 for sharing a great workaround, which I’d recommend following to get unblocked in the meantime. To keep CLI discussion in one place, I’m going to c…

Yes, we are developing a custom theme using vite and page reload, and lately it’s been a pain, after 30 minutes of work it starts blocking us.

Thanks for sharing! We’re working on an update to resolve this issue and will provide an update here when it’s available.

I’ve not seen this error for a few months but my colleague and I have both experienced it this morning. Very frustrating for such a major bug to return. I don’t care if the screen shows up, just display the cloudflare captcha too!

Noticed this popping up today randomly for multiple people, and we are blocked out of the local development store. The Cloudflare captcha tool is not visible either. On the latest version 3.94.3. We’ve cleared any data, restart dev servers, re-authed, closed and tried different browsers, and still …

Same issue here, cannot work at all with the CLI. It s not showing the cloudflare captcha, and repeated on all stores / themes I tried

@Paige-Shopify I did upgrade but to no avail. I commented on the other thread for their help as per your recommendation. I understand you are support staff so I am not angry with you personally and appreciate your assistance. Separately, I am very infuriated with the situation as it has made it ext…

I’ve noticed this issue at the start of this week, but in my case I can’t access any page on shopify theme dev, I immediately get redirected to /cart and hit with the 429

After refreshing the page a few times… It gets stuck in an endless loop of “429 Too Many Requests.” It completely kills my productivity—I can’t get any work done at all!

i can’t use cli at all. as soon as i run it. i am really getting tired of this. ** Update: Sharing a workaround that got me unblocked today, in case it helps others hitting the same wall. ** My CLI was on 3.94.3 (well past the 3.92.1 rate-limit fix), and the 429s had cleared. However, as soon as …

Aggressive bot detection with 429 errors AJAX Cart API

Online Store and Theme Development

ayoub May 20, 2026, 8:09pm 91

Hey @Paige-Shopify

The specific 403 issue has been reported here: Shopify Ajax API returning Cloudflare 403 verification errors

Topic		Replies	Views
429 Too many requests Shopify CLI and Libraries theme-commands , app-dev-on-localhost	50	1247	June 2, 2026
CLI > Theme Dev > cart ajax 401 Shopify CLI and Libraries theme-commands	66	1386	May 20, 2026
Bug: 429 page errors are too aggressive Shopify App Store dev-stores	52	2016	May 13, 2026
Your connection needs to be verified before you can proceed Shopify CLI and Libraries theme-commands	33	1295	May 26, 2026
Ajax API aggresive 429 status responses when running theme locally Online Store and Theme Development theme-troubleshootin , ajax-api	2	75	February 18, 2026

Aggressive bot detection with 429 errors AJAX Cart API

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