How to Sell on ChatGPT in 2026: Complete ACP Merchant Setup Guide

ChatGPT is now a shopping destination. As of February 2026, OpenAI's Agentic Commerce Protocol (ACP) is live for all US users — including the Free tier — letting 800–900 million weekly active users discover and buy products without leaving the chat interface. If you sell online and you're not set up on ACP yet, you're missing a fast-growing channel.

This guide covers everything a merchant needs to know: what ACP is, how to get listed, the fee structure, and how to optimize your product data for ChatGPT's recommendation engine.

What Is the Agentic Commerce Protocol (ACP)?

ACP is an open-source REST API standard, co-developed by OpenAI and Stripe under the Apache 2.0 license. It defines how AI agents discover products, compare options, and complete purchases on behalf of users.

When a ChatGPT user says "find me a standing desk under $400", the assistant queries ACP-connected merchant feeds, surfaces relevant products with images and pricing, and allows checkout via Stripe's Shared Payment Tokens — all inside the conversation.

Google has a competing standard called the Universal Commerce Protocol (UCP), but ACP currently dominates by user reach. Both are worth implementing.

Who Can Use ACP?

ACP is open to any merchant who sells physical or digital products online. As of April 2026:

• Shopify — native integration, over 1 million merchants in the onboarding pipeline
• Etsy — first marketplace live on ACP
• PayPal merchants — tens of millions of small businesses via PayPal's ACP server
• WooCommerce / Magento / custom stores — via direct API integration

Setup: Shopify Merchants (Easiest Path)

If your store runs on Shopify, setup takes under 10 minutes:

1. Log in to your Shopify Admin
2. Go to Sales Channels → Add Sales Channel
3. Search for "ChatGPT" and click Add
4. Connect your Stripe account (or create one)
5. Review and publish your product feed

Shopify merchants receive a 30-day free trial from their first qualifying order — no transaction fees during the trial period.

After setup, your products are eligible to appear in ChatGPT within 24–48 hours as the feed indexes.

Setup: Non-Shopify Merchants (API Integration)

Non-Shopify stores must implement ACP directly. The protocol uses a four-endpoint REST API: Create Checkout, Update Checkout, Complete Checkout, and Cancel Checkout.

Steps:

1. Build a product feed — structured JSON catalog with title, description, price, images, inventory, and category tags
2. Register as an ACP merchant at platform.openai.com (Commerce section)
3. Integrate Stripe using Shared Payment Tokens (SPTs) — these are single-use, time-limited tokens that keep raw payment data off your server
4. Expose the four ACP endpoints on your server and pass the endpoint URLs to OpenAI during registration
5. Test with the ACP sandbox before going live

Full API documentation is available on GitHub under the openai/agentic-commerce-protocol repository.

Fee Structure

On a $100 order, total fees are approximately $7.20 (4% to OpenAI + 2.9% + $0.30 to Stripe). That's comparable to Amazon's referral fees and significantly lower than most marketplace fees.

How Product Ranking Works

ChatGPT ranks products by relevance, inventory status, and product data quality — not by who pays more. The 4% fee has no effect on your visibility.

To rank well, focus on:

• Descriptive titles — include key attributes (size, material, use case)
• Detailed descriptions — write for intent, not just keywords
• High-resolution images — ChatGPT surfaces product images in results
• Accurate inventory — out-of-stock items are deprioritized
• Competitive pricing — the model compares prices across merchants
• Category tagging — use ACP's standard taxonomy for accurate matching

ACP vs Google UCP: Should You Do Both?

ACP (OpenAI) and UCP (Google) serve different intent patterns:

• ACP excels at conversational discovery — users describe what they want in natural language, and ChatGPT finds matches
• UCP targets high-intent search queries — users searching Google with shopping intent

Both are free to implement, so there's no reason to skip either. Priority: implement ACP first due to ChatGPT's user base, then add UCP via Google Merchant Center once you're live.

Tips to Maximize Sales on ChatGPT

• Use conversational product descriptions — think about how a customer would describe what they want, and mirror that language in your catalog
• Enable instant checkout — products with full Stripe integration convert better than those requiring external checkout
• Keep inventory real-time — stale stock data hurts rankings and frustrates buyers
• Add returns/shipping info — ChatGPT surfaces this data when users ask about policies
• Monitor ACP analytics — OpenAI provides impression, click, and conversion data in the merchant dashboard

Using AI to Manage Your ChatGPT Store

Once your store is live, AI tools can help you optimize it continuously. Happycapy can automate catalog management tasks — rewriting product descriptions for conversational search, identifying low-performing SKUs, and generating optimized category tags from your existing product data.

For example, you can prompt Happycapy to "Rewrite these 50 product descriptions to be more conversational and ACP-optimized" and get a ready-to-upload batch in minutes. See our guide on using AI for e-commerce for more workflows.

Frequently Asked Questions

What is ChatGPT ACP and how does it work for merchants?

ACP (Agentic Commerce Protocol) is an open standard by OpenAI and Stripe that lets merchants list products inside ChatGPT. When users ask ChatGPT to find or buy something, ACP-enabled stores appear in results, and users can complete checkout without leaving the chat.

How much does it cost to sell on ChatGPT?

OpenAI charges a 4% transaction fee per completed purchase. You also pay standard Stripe processing fees (2.9% + $0.30). No monthly fees, no upfront costs. Shopify merchants get a 30-day free trial.

Do I need to be on Shopify to sell on ChatGPT?

No. Shopify has the easiest setup, but non-Shopify merchants can integrate via the ACP REST API and Stripe. WooCommerce, Magento, and custom stores are all supported.

How many users can see my products on ChatGPT?

ChatGPT has 800–900 million weekly active users in the US as of April 2026, with international expansion planned for later in 2026. ACP shopping is available to all tiers including Free users.