We put our x402 shop behind an MCP server

Description and use

The MCP server lets agents use the x402 shop without manual account setup or API keys, automatically handling pricing, wallet checks, and live product updates.

Problem

x402 buyers do not appear on their own; each buyer requires manual setup by a person.

Outcome

The MCP server enables agents to use the x402 shop without manual setup, automatically handling pricing, wallet checks, and live product updates.

Workflow

• 1. Agent accesses the MCP server URL.
• 2. Server reads the price from the shop and compares it to the wallet owner’s limit.
• 3. If a wallet is configured, the server pays on Base; otherwise it only displays the price.
• 4. Products are read live from the shop, so new items appear automatically.

Evidence

x402 buyers don't show up on their own. Behind every agent that buys, there's a person who set it up.

Source

Before signing anything, it reads the price and compares it with the limit set by the wallet's owner. It pays on Base, and if no wallet is configured it doesn't pay, it only shows the price.

Source

The tools are read live from the shop, so a new product shows up without updating anything.

Source