Anthropic ships Agent Commerce SDK · Claude becomes a buyer
The new SDK lets Claude browse catalogs, compare products and complete purchases in a structured way. Brands that do not expose their catalog to agents lose the next storefront.
Mariano De Vitto · May 2026
Anthropic shipped the Agent Commerce SDK this week, a library that lets Claude · and other agents via an open protocol · browse e-commerce catalogs, compare products, authenticate and complete purchases on the user's behalf. The release lands four weeks after Sonnet 4.7, which had already prioritized reliability as a core attribute. Sonnet 4.7 was the engine. This week's SDK is the steering wheel.
Catalog as API, not as page
The mental shift for marketing is precise · your product stops being an HTML page and becomes an endpoint. An agent does not scan the storefront looking at hero images. It requests JSON · SKUs, variants, real-time stock, returns policy, aggregated reviews and net price. Brands that already invested in clean product feeds · typically those selling on Google Shopping, Amazon and comparison engines · are ready. Brands that rely 100% on direct PDP traffic are a step behind.
Three direct effects on the marketing plan
The first is search budget. Commercial queries that historically ended on a Google SERP with three paid ads at the top increasingly end on an agent response that already filtered offers and pushed the user straight to checkout. Share of impression drops in Google and moves to an aggregator running in the background. If your SEO/SEM retention depended on the first click, it needs renegotiation. The second is structured data. JSON-LD Product schema stops being a "nice-to-have" SEO add-on and becomes a mandatory feed for agent commerce. The brand that does not expose GTIN, price, ratings and stock in structured format is invisible. The third is attribution. The user arrives at checkout without a brand click · they came from a conversation. Last-click breaks in this scenario and MMM models become mandatory.
The open question is margin
The unresolved question is margin. If the agent compares prices cross-retailer and pushes to the best deal, the category effect is a price compression that will hurt in luxury, premium beauty and products where the upcharge was sustained by shopper friction in comparing. The brands that win the next year will be the ones that build differentiation an agent can read · certified sustainability, limited drops, exclusive brand-only bundles · beyond price. What does not differentiate gets commoditized.
The minimum viable test this quarter is to verify that your main catalog is exposed via complete Schema.org Product markup, including offers, availability, aggregateRating and returnPolicy. If you sell on Shopify or any SaaS platform, that is actionable today. If you sell on a proprietary stack, it requires IT work but it is the highest-ROI SEO/GEO investment of the year.
This week's signal: Anthropic just turned Claude into a buyer. If your catalog does not speak to an agent through structured data, you are already losing impressions you will not see in Google Analytics.
The Signal Brief · Mariano De Vitto — Head of Marketing, Barcelona