What is agentic commerce? A plain-English guide

Agentic commerce is when an AI assistant completes a purchase or booking on a real customer’s behalf: choosing the item, presenting proof of authorization, and paying, without the customer visiting your website. The customer says “order my usual from the ramen place” and their agent handles catalog lookup, checkout, and payment.

How is this different from normal e-commerce?

In traditional e-commerce, a person browses your site and clicks Buy. In agentic commerce, software acts at the “point of intent”: the conversation where the customer expresses what they want. The agent then needs three things from your business:

1. A machine-readable catalog so it can find and price what you sell
2. A checkout or booking endpoint it can call programmatically
3. A way to prove the customer authorized the purchase (a signed mandate)

If any of the three is missing, the agent either gives up or recommends a competitor that has them.

How big is agentic commerce right now?

Small but compounding fast. The honest picture, with sources:

• AI platforms drove roughly $20.6B of US retail e-commerce in 2026, about 1.5% of the total (eMarketer)
• Adobe measured 693% year-over-year growth in AI-driven traffic to US retail sites during the 2025 holiday season
• Shopify reported orders originating from AI search up about 13x year over year in Q1 2026
• Gartner projects machine customers will influence or participate in $30 trillion of purchases by 2030
• McKinsey estimates $3 to 5 trillion in global agentic-commerce revenue by 2030

Meanwhile the old channel is shrinking: 68% of US Google searches now end without a click (Search Engine Land, 2026), and Gartner expects organic search traffic to fall 25% as discovery moves into AI chat.

Who are the major players?

The stack settled into layers during 2025 and 2026:

• Checkout protocols: ACP (OpenAI and Stripe) powers ChatGPT Instant Checkout; UCP (Google) covers catalog, cart, and identity
• Authorization: AP2 (Google plus 60+ partners) defines cryptographically signed intent and cart mandates
• Card networks: Visa Intelligent Commerce and Mastercard Agent Pay verify agents at the payment layer
• Machine payments: x402 (Coinbase) handles HTTP-native stablecoin payments
• Tooling: MCP, the open standard agents use to call tools like “search catalog” or “book table”

No single protocol has won, which is exactly why most businesses integrate through infrastructure that abstracts them rather than betting on one.

What should a business do about it?

Three practical moves, in order of effort:

1. Stop blocking AI crawlers. Publishers that blocked them lost 23.1% of total traffic without reducing citations (Rutgers/Wharton, Dec 2025). Allow GPTBot, ClaudeBot, PerplexityBot, and Google-Extended in robots.txt.
2. Publish structured data. Schema.org markup, clean HTML, and an llms.txt file make you legible to answer engines today.
3. Expose a transactable surface. A catalog feed, an MCP endpoint, and protocol-compliant checkout make you purchasable tomorrow. This is the layer Errand provides as a single integration.

Frequently asked

Is agentic commerce safe for merchants? Yes, when authorization is explicit. Protocols like AP2 attach a signed user mandate to every purchase, giving merchants stronger proof of intent than a normal card-not-present order.

Do customers actually want this? Adoption follows convenience. The same pattern played out with mobile checkout and delivery apps: once assistants complete purchases reliably, the friction of doing it manually becomes the anomaly.

Does this replace my website? No. It adds a second front door. Your website serves people; your agent surface serves the software acting for them.