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BlockCart: Checkout Validation

Block PO boxes, set order limits, MOQ & ZIP code...

by Disco Merchant · Launched: May 2026 · Free plan available.

5.0 (1) on Shopify
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Block invalid Shopify orders with no-code cart and checkout rules. Set order limits, restrict products by ZIP code, enforce B2B rules, and show clear errors.

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About BlockCart: Checkout Validation

Block bad-fit orders before they create cancellations and fulfillment work. Build no-code cart and checkout rules with multiple AND/OR conditions. Set minimum order quantity (MOQ), minimum cart value, and maximum quantity or value limits. Restrict products or collections by ZIP code, postal code, country, customer tag, login status, or company. When a rule matches, BlockCart stops checkout and shows a clear custom error so the buyer can fix the cart and continue.

Last verified: October 21, 2026 · Fresh

App details

Developer
Disco Merchant
Pricing
Free plan available
Launched
May 2026
Rating
5.0 (1) on Shopify

Key features

  • Free for dev stores
  • Free for Shopify Plus sandbox stores
  • Mix Different Conditions
  • Unlimited Checkout Validation Rules
Integrations with:

Checkout Shopify Admin

2 plans · starts free · 7-day free trial

FREE DEV

Free

Standard Plan

$3.99/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 1 Shopify App Store reviews

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Excellent app with genuinely standout support. We had a very specific Shopify B2B checkout validation use case involving custom cart attributes and multiple approved internal codes, and Osman was incredibly responsive throughout the entire setup. He understood exactly what we were trying to accomplish, helped troubleshoot the logic, and even added a new condition to support our workflow. Everythin...
— My Store

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