Walmart opens an MCP gateway for shopping agents, with per-agent spending limits next month

Walmart announced three pieces on 21 October for AI agents that shop for people: a gateway agents can call directly, a separate profile for each agent inside a customer’s account, and a set of terms agents must follow. The gateway starts as a beta for companies and developers; the profiles arrive “in the next month”.

The Agent Gateway

Today an agent that shops on Walmart.com drives the website like a person, which Walmart calls “slow and error-prone”. The Walmart Agent Gateway instead gives agents an MCP interface, the Model Context Protocol many agent tools already speak, to search and buy at Walmart and Sam’s Club. Walmart says the gateway can also help an agent reorder a customer’s usual items, such as a favourite brand of milk, without sharing the customer’s wider purchase history with the agent.

Agent Profiles

Right now an agent signs in as the customer, so its orders mix with everything else. With Agent Profiles, Walmart creates a profile for each agent the first time it shops through the gateway, and the customer links it by signing in to their Walmart account. Customers can then:

• see each agent’s purchases separately;
• require approval for every purchase, or let the agent buy within a spending limit they set, with $50, $100 or $200 as Walmart’s examples;
• delete an agent’s profile at any time.

Walmart says agents see the same prices a person sees on Walmart.com, with offers and fees shown before purchase.

The terms for agents

Walmart’s rules, in short:

• customers must approve agent purchases by default, and Walmart may ask for extra approval even inside a spending limit;
• agents must not act beyond what the shopper intends;
• agents never receive card details and cannot add or change payment methods;
• agents get only the information a task needs and the customer allows;
• Walmart’s returns process applies, “including if an agent doesn’t act as intended”;
• agents that break the terms “will be blocked from Walmart’s site”.

What this means if you build agents

This is one of the first large retailers to publish both an API for agents and rules for them, at a time when some sites block agents outright. For builders, the practical points are that the beta runs over MCP, that Walmart holds the payment details, and that per-purchase approval is the default you should design for. The beta page was behind a bot check when we tried it, so we could not confirm the signup terms.