Monitor Mastra with FrontierStack

Mastra is an open-source TypeScript framework for agents, tools and durable workflows. Its server, from mastra dev or mastra start, listens on port 4111. FrontierStack reads its API; the agents, the workflows and how many workflow runs are running or suspended waiting for input; and shows the server on the Agent Platforms board with its health, so a stopped dev server or a pile of suspended runs is visible next to your other agents. When the server has authentication configured, paste the Bearer token it accepts.