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MCP Lab

Fault Tools

ping

Section titled “ping”

Returns a deterministic health payload with status: "ok" and a timestamp. Use it for discovery, smoke tests, and observer verification.

delay

Section titled “delay”

Accepts delayMs from 0 through 30000, waits for that duration, then returns successfully. The implementation is bounded and cancellation-aware.

{ "delayMs": 500 }

hang

Section titled “hang”

Intentionally never returns a response. It remains pending until the client cancels, making timeout and cancellation cleanup paths reproducible without leaving server work running.

disconnect

Section titled “disconnect”

Closes the active MCP transport while its request is in flight. The client receives a connection failure rather than a tool result, exercising transport-loss handling.