Quickshop

Credpay Checkout Agent is a checkout-as-a-service API that lets developers add real-world purchasing capabilities to their AI agents.

A dev building a shopping assistant, a personal agent (like OpenClaw), or any AI-powered tool can integrate Credpay so their agent can actually buy things — not just recommend products. The agent sends item URLs, shipping details, and a USDC payment authorization via the x402 protocol, and Credpay handles the entire Shopify checkout autonomously.

Payment uses an "upto" scheme: the calling agent authorizes a maximum USDC amount upfront, and only the actual cost is settled on-chain after the purchase completes, so agents never overspend. Devs get a /quote endpoint to show users cost breakdowns before committing, and a polling endpoint to track order status. The result: any developer can turn their agent from an advisor into a buyer with a single API integration and a crypto wallet

The service is a TypeScript Hono REST API built for developer integration. A dev's agent hits /config to discover supported chains and pricing, /quote to get a cost breakdown they can surface to their user, and POST /checkout with an x402 payment header to execute a purchase.

Payment flows through the x402 protocol — the dev's agent signs a USDC authorization from the user's wallet, and Credpay verifies it on-chain before proceeding. We use an "upto" payment scheme so the user authorizes a max amount (goods + service fee), and only the actual spend is settled.

Checkout status lives in Redis (with in-memory fallback for dev environments) so agents can poll asynchronously.