A real MCP use case: how Flex built a custom MCP server so a non-technical merchant could manage subscriptions and payments by chatting with an AI, with no API, no dashboard, and no support tickets.
Flex MCP is a new MCP server that connects AI assistants like Claude, Cursor, Codex, and Windsurf directly to your Flex account, so you can look up orders, reconcile payments, manage billing, and run reports without leaving your coding or productivity tools.
We built a Slack agent that can trace a transaction end to end—and, when it finds a bug, open a pull request with a proposed fix.
Our engineering team explains how to listen to and verify webhooks in your Flex-powered checkout to secure order confirmations and reduce fraudulent orders.
