diff --git a/changes/2698.fix.md b/changes/2698.fix.md
new file mode 100644
index 0000000000..1b8977cabf
--- /dev/null
+++ b/changes/2698.fix.md
@@ -0,0 +1 @@
+Add missing implementation of wsproxy and manager CLI's log-level customization options
diff --git a/src/ai/backend/manager/cli/__main__.py b/src/ai/backend/manager/cli/__main__.py
index b34e2d65f8..f5fd2dc37e 100644
--- a/src/ai/backend/manager/cli/__main__.py
+++ b/src/ai/backend/manager/cli/__main__.py
@@ -64,6 +64,8 @@ def main(
     Manager Administration CLI
     """
     setproctitle("backend.ai: manager.cli")
+    if debug:
+        log_level = LogLevel.DEBUG
     ctx.obj = ctx.with_resource(CLIContext(config_path, log_level))
 
 
diff --git a/src/ai/backend/manager/cli/context.py b/src/ai/backend/manager/cli/context.py
index 0ab08e6410..46bad1b52d 100644
--- a/src/ai/backend/manager/cli/context.py
+++ b/src/ai/backend/manager/cli/context.py
@@ -52,7 +52,13 @@ def __enter__(self) -> Self:
         # If we duplicate the local logging with it, the process termination may hang.
         click_ctx = click.get_current_context()
         if click_ctx.invoked_subcommand != "start-server":
-            logging_config = {}
+            logging_config = {
+                "level": self.log_level,
+                "pkg-ns": {
+                    "": LogLevel.WARNING,
+                    "ai.backend": self.log_level,
+                },
+            }
             try:
                 # Try getting the logging config but silently fallback to the default if not
                 # present (e.g., when `mgr gql show` command used in CI without installation as
diff --git a/src/ai/backend/wsproxy/cli/__main__.py b/src/ai/backend/wsproxy/cli/__main__.py
index bca4e0bb01..583d1ab30e 100644
--- a/src/ai/backend/wsproxy/cli/__main__.py
+++ b/src/ai/backend/wsproxy/cli/__main__.py
@@ -1,6 +1,7 @@
 import asyncio
 import importlib
 import json
+import logging
 from pathlib import Path
 from typing import Any
 
@@ -15,9 +16,30 @@
 from ..config import ServerConfig, generate_example_json
 from ..openapi import generate_openapi
 from ..utils import ensure_json_serializable
+from .context import CLIContext
+
+log = logging.getLogger(__spec__.name)  # type: ignore[name-defined,union-attr]
 
 
 @click.group(invoke_without_command=False, context_settings={"help_option_names": ["-h", "--help"]})
+@click.option(
+    "-f",
+    "--config-path",
+    "--config",
+    type=click.Path(
+        file_okay=True,
+        dir_okay=False,
+        exists=True,
+        path_type=Path,
+    ),
+    default=None,
+    help="The config file path. (default: ./manager.conf and /etc/backend.ai/manager.conf)",
+)
+@click.option(
+    "--debug",
+    is_flag=True,
+    help="Set the logging level to DEBUG",
+)
 @click.option(
     "--log-level",
     type=click.Choice([*LogLevel], case_sensitive=False),
@@ -27,12 +49,17 @@
 @click.pass_context
 def main(
     ctx: click.Context,
-    log_level: str,
+    config_path: Path,
+    log_level: LogLevel,
+    debug: bool,
 ) -> None:
     """
     Backend.AI WSProxy CLI
     """
     setproctitle("backend.ai: wsproxy.cli")
+    if debug:
+        log_level = LogLevel.DEBUG
+    ctx.obj = ctx.with_resource(CLIContext(config_path, log_level))
 
 
 @main.command()
diff --git a/src/ai/backend/wsproxy/cli/context.py b/src/ai/backend/wsproxy/cli/context.py
index 213fdc1a2f..99663e36e9 100644
--- a/src/ai/backend/wsproxy/cli/context.py
+++ b/src/ai/backend/wsproxy/cli/context.py
@@ -31,7 +31,13 @@ def __enter__(self) -> Self:
         # If we duplicate the local logging with it, the process termination may hang.
         click_ctx = click.get_current_context()
         if click_ctx.invoked_subcommand != "start-server":
-            self._logger = LocalLogger({})
+            self._logger = LocalLogger({
+                "level": self.log_level,
+                "pkg-ns": {
+                    "": LogLevel.WARNING,
+                    "ai.backend": self.log_level,
+                },
+            })
             self._logger.__enter__()
         return self
 
diff --git a/src/ai/backend/wsproxy/server.py b/src/ai/backend/wsproxy/server.py
index d462d689d0..aa689fdf56 100644
--- a/src/ai/backend/wsproxy/server.py
+++ b/src/ai/backend/wsproxy/server.py
@@ -408,6 +408,11 @@ async def server_main_logwrapper(
     default=None,
     help=("The config file path. (default: ./wsproxy.toml and /etc/backend.ai/wsproxy.toml)"),
 )
+@click.option(
+    "--debug",
+    is_flag=True,
+    help="This option will soon change to --log-level TEXT option.",
+)
 @click.option(
     "--log-level",
     type=click.Choice([*LogLevel], case_sensitive=False),
@@ -415,11 +420,16 @@ async def server_main_logwrapper(
     help="Set the logging verbosity level",
 )
 @click.pass_context
-def main(ctx: click.Context, config_path: Path, log_level: LogLevel) -> None:
+def main(
+    ctx: click.Context,
+    config_path: Path,
+    log_level: str,
+    debug: bool = False,
+) -> None:
     """
     Start the wsproxy service as a foreground process.
     """
-    cfg = load_config(config_path, log_level)
+    cfg = load_config(config_path, LogLevel.DEBUG if debug else LogLevel[log_level])
 
     if ctx.invoked_subcommand is None:
         cfg.wsproxy.pid_file.touch(exist_ok=True)