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There’s already a schema.org spec that defines a JSON-LD structured data that you can embed on every of your product page to provide a machine readable interface of your product.

For example, Google’s indexers already use this to surface pricing data. https://developers.google.com/search/docs/appearance/structu...

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That`s is valid for search engines. But if JSON-LD was sufficient for agents, Google wouldn't have launched UCP (Universal Commerce Protocol) yesterday.

Took a look, UCP looks like presenting an entire shopping lifecycle for agents.

JSON-LD is just read-only metadata for machines.

True. But extracting that metadata requires parsing the full DOM. CommerceTXT is for efficient discovery. Scan inventory cheaply first, then commit to the transaction.

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