Your feed uses values ChatGPT cannot read

It concerns ACP, the chatgpt checkout. The Agentic Commerce Protocol, from OpenAI and Stripe. It is how ChatGPT completes a purchase on your store.

Agents can usually carry on, but more slowly or less sure of what they found, and an unsure agent is likelier to recommend another store.

ACP requires a title of at most 150 characters, a description of at most 5,000, a price with an ISO 4217 currency code, and an availability value. Items missing these are dropped from the index rather than shown incorrectly, so the catalogue silently shrinks.

Run the check that reported ACP_FEED_ATTRIBUTE_INVALID again after the change. The scan needs no account; an issue found during an AI shopping test needs that test run again.

$ npx @tragent/cli scan https://your-store.com

• ChatGPT checkout could not start a session
• Paying on a customer's behalf was refused
• Your ChatGPT product feed cannot be read