Claude Code CLI MCP Server

Environment

• CLAUDE_MCP_MODE

  Server access mode (safe or permissive).

• CLAUDE_MCP_MAX_RUNS

  History size of completed tasks in the run store.

• CLAUDE_MCP_FORCE_BARE

  Pass --bare to disable local workspace profiles and hooks.

• CLAUDE_MCP_CLAUDE_PATH

  Path or command to invoke the claude CLI.

• CLAUDE_MCP_ALLOWED_ROOTS

  JSON list of allowed workspace roots.

• CLAUDE_MCP_LOGFIRE_TOKENsecret

  Optional Logfire token for application telemetry.

• CLAUDE_MCP_ALLOWED_MODELS

  JSON set of permitted model names or aliases.

• CLAUDE_MCP_ALLOW_ENV_KEYSsecret

  JSON list of allowed env keys to pass in permissive mode.

• CLAUDE_MCP_ALLOW_EXTRA_ARGS

  JSON list of allowed CLI arguments in permissive mode.

• CLAUDE_MCP_MAX_STDERR_BYTES

  Maximum stderr bytes captured from the child process.

• CLAUDE_MCP_MAX_STDOUT_BYTES

  Maximum stdout bytes captured from the child process.

• CLAUDE_MCP_DEFAULT_TIMEOUT_S

  Maximum allowed execution time for tasks in seconds.

• CLAUDE_MCP_MAX_CONCURRENT_RUNS

  Maximum concurrent background executions allowed.

• CLAUDE_MCP_PERSISTENCE_ENABLED

  Enables the persistent markdown memory layer.

• CLAUDE_MCP_PERSISTENCE_BASE_DIR

  Base directory for the persistence layer.

• CLAUDE_MCP_CLAUDE_PATH_FALLBACKS

  Fallback absolute paths to search for the binary.

• CLAUDE_MCP_DEFAULT_PERMISSION_MODE

  Permission mode flag (default, acceptEdits, plan, dontAsk, bypassPermissions).

• CLAUDE_MCP_POLL_DEFAULT_WAIT_SECONDS

  Default wait time between polling iterations.

• CLAUDE_MCP_FORCE_SANDBOX_IN_SAFE_MODE

  Enforce sandbox execution in safe mode.

• CLAUDE_MCP_PERSISTENCE_MAX_FILE_BYTES

  Maximum file size for persistence files before rejecting writes.

• CLAUDE_MCP_PERSISTENCE_SEED_TEMPLATES

  Seed default markdown files if missing on init.

• CLAUDE_MCP_PERSISTENCE_BACKUP_ON_WRITE

  Create a .bak backup copy of files before modification.