The Plaid AI Development Toolkit is designed to help developers build quickly and test their ideas immediately. The toolkit includes AI Integration Guides, which provide context for building Plaid integrations, and a sandbox MCP server, which allows local development and testing of Plaid's sandbox APIs in a safe environment. The guides cover common use cases such as transactions, transfers, and risk assessment, and the sandbox MCP server enables users to generate custom test users, trigger webhook events, and more. With this toolkit, developers can accelerate building, iterating, and testing their integrations, while the AI handles setup and the sandbox environment provides a safe space for experimentation and refinement.