# An app adds a surcharge, a fee, or a required add-on at checkout. Will an AI agent's checkout skip it? > App checkout blocks may be skipped in direct checkout. Check required fees; ChatGPT uses your store checkout. September 5, 2026 · Sources checked September 5, 2026 https://app.ai-commerce-ready.com/blog/agent-checkout-and-surcharge-apps/ ## When this applies A checkout block from an app adds a surcharge, a mandatory fee, an insurance or handling line, an upsell, or collects consent or input, and direct checkout is on for Google AI Mode, Gemini, Microsoft Copilot, or Meta. [2][3][1] ## When this does not apply ChatGPT sales complete in your own online store checkout, where Shopify states all your customizations, selling strategies, and payment methods are supported. A charge that lives in a Shopify Function also runs in direct checkout. [4][2] ## Why this matters Fee-adding checkout blocks might not display in direct checkout, while the buyer can still complete the order. [2][3] ## What to do List each required fee and its source. Move block-based fees into price, shipping, or a Function, or turn off the affected channel’s direct checkout until corrected. [2][3][5] ## When you’re done Every required charge is one that Shopify states runs in direct checkout, or direct checkout is off for the channels where it would be skipped, and a test order through the channel shows the expected total. [2][5] ## What this cannot prove A correct total on one test order proves the charge for that path on that day. It does not prove that every channel renders the same blocks, or that a channel will keep its current behavior. [2][1] ## Paid help and free options - When paid help makes sense: Paid help is worth it only when a required charge cannot be expressed as price, shipping, or a discount and a developer must rebuild it as a Shopify Function. That is bounded development work, not a subscription. [2] - What’s already free: Reading your checkout's blocks, moving a fixed fee into price or shipping, and switching a channel's direct checkout off are all admin actions, and Shopify charges no fee for selling in direct checkout beyond payment processing. [3][2] A required fee added by an app's checkout block may be missing from an AI channel's direct checkout. Check how each fee is collected before leaving that checkout on. ## Check where the buyer pays Shopify's [channel overview](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts) separates two routes: - **ChatGPT:** buyers use your online store checkout. Shopify's [ChatGPT page](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt) says this supports your customizations, selling strategies, and payment methods. - **Google AI Mode, Gemini, Copilot, and Meta:** with direct checkout on, buyers can pay inside the channel using Shopify-powered checkout. ## Check how each required fee is added Shopify's [Copilot instructions](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft) say shipping, discount, and cart or checkout validation Functions run. Automatic discounts and discount codes are supported. Checkout blocks that add fees or change cart items might not display, while the buyer can still finish the order. Other affected blocks include loyalty, address autocomplete, client-side validation, consent, chat, header/footer/payment content, and information such as terms or reviews. Google Analytics and custom pixels do not fire there. The [Google instructions](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/google) also support Functions and discounts but warn that some custom fields, upsells, and validations might not display. Google direct checkout is shown only to US buyers. For each required fee, record whether it comes from price, shipping, a Function, or a checkout block. Move block-based fees into a supported method, or turn off direct checkout for the affected channel in [Sales channels > Agentic](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/agentic-home) until the change is ready. Optional offers do not need this fee-preservation work. ## Check the total Where possible, place a test order through the channel. Compare its items and total with the same cart on your storefront. Finish with a fee list, the action for each required block-based charge, and a correct test total. One order confirms only that route on that date; blocks and channel behavior can change. ## Sources 1. [Agentic storefronts help](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts) 2. [Selling on Microsoft Copilot](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/microsoft) 3. [Selling on Google AI Mode and Gemini](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/google) 4. [ChatGPT agentic storefront](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/chatgpt) 5. [Managing agentic storefronts](https://help.shopify.com/en/manual/online-sales-channels/agentic-storefronts/agentic-home)