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The Agentic Development Kit (ADK) gives merchants a practical way to make their products purchasable directly inside AI platforms—without rebuilding their existing payment infrastructure. Built on the Model Context Protocol (MCP), the ADK enables embedded shopping and checkout experiences within conversational interfaces, with Gr4vy handling payment orchestration through a single API.

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Supported platforms

ChatGPT

Build an AI-native storefront inside ChatGPT. Let customers browse products, manage a cart, and check out with Gr4vy Embed—all within a conversation.

Gemini

Coming soon. Build an AI-native storefront inside Google Gemini.

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How it works

Each ADK integration follows the same pattern:
  1. MCP server: Your server exposes tools (actions the AI can invoke) and resources (UI widgets it can embed) over the Model Context Protocol.
  2. Widgets: Self-contained HTML widgets render inside the AI platform as inline frames, giving you full control over the shopping experience.
  3. Gr4vy Embed: A PCI-compliant payment form loads inside the checkout widget, backed by Gr4vy orchestration, real-time routing, and webhook verification.
  4. Single API: Once live, your storefront connects to Gr4vy through a single integration, giving you access to 400+ payment methods and PSPs using your existing payment stack.

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Reference implementations

ChatGPT - TypeScript

Reference implementation using Node.js, Express, React, and the MCP SDK.

ChatGPT - Python

Reference implementation using Python and FastMCP.