Schema | Cuba-Exec

Cuba-Exec

Describes the environment variables required to run the server.

Name	Required	Description
`CUBA_EXEC_TTL`	No	Idle process TTL in seconds (default: 3600)
`CUBA_EXEC_AUDIT`	No	Enable audit logging (set to 1 to enable).
`CUBA_EXEC_MAX_PROCS`	No	Maximum concurrent processes (default: 20)
`CUBA_EXEC_BUFFER_SIZE`	No	Output buffer size in bytes (default: 64KB)
`CUBA_EXEC_ALLOWED_DIRS`	No	Comma-separated list of allowed working directories.
`CUBA_EXEC_ALLOWED_COMMANDS`	No	Comma-separated list of allowed commands. If set, only these commands can execute.
`CUBA_EXEC_BLOCKED_COMMANDS`	No	Comma-separated list of blocked commands. Overrides default blocklist.
`CUBA_EXEC_SHUTDOWN_TIMEOUT`	No	Graceful shutdown timeout in seconds (default: 5)

Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.

This server publishes no instructions, or was last inspected before Glama recorded them.

Features and capabilities supported by this server

Protocol revision2025-11-25

Capability	Details
`tools`	{ "listChanged": true }
`logging`	{}
`prompts`	{ "listChanged": false }
`resources`	{ "subscribe": false, "listChanged": false }
`extensions`	{ "io.modelcontextprotocol/ui": {} }
`experimental`	{}

Functions exposed to the LLM to take actions

Name	Description
runA	Execute a shell command synchronously and wait for completion. Returns exit code, duration, and captured stdout+stderr. Output is bounded by max_output (default 64KB) using head+tail capture.
startA	Start a background process and return its PID. The process runs asynchronously. Use status() to check output, signal() to send signals, and input() to send stdin.
statusA	Check background process state, exit code, and tail output. Returns process state (running/completed/timed_out), duration, total bytes captured, truncation status, and recent output.
send_signalA	Send a POSIX signal to a process group. SIGTERM triggers graceful shutdown: SIGTERM → wait 5s → SIGKILL. Valid signals: SIGTERM, SIGKILL, SIGINT, SIGHUP, SIGQUIT.
send_inputA	Send text to a running process's stdin. Use this for interactive processes (REPLs, prompts). The text is encoded as UTF-8 and written to the process stdin pipe.
list_processesA	List all managed background processes with state and metadata. Returns PID, state, exit code, duration, bytes captured, and command preview for every background process currently tracked by the server.

Interactive templates invoked by user choice

Name	Description
No prompts

Contextual data attached and managed by the client

Name	Description
No resources

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curl -X GET 'https://glama.ai/api/mcp/v1/servers/LeandroPG19/cuba-exec'

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