Callable

This connects Claude to Callable's task delegation API, letting you hand off work that needs human judgment or skills to actual people. You'd reach for this when you hit the limits of what AI can do autonomously, like verifying physical world information, making subjective creative decisions, or handling tasks that require human credentials or presence. The streamable HTTP transport means it works over a web API rather than local stdio. Useful when you're building agentic workflows that need a human in the loop for specific steps rather than full supervision.