diff --git a/apps/api/src/core/logging.py b/apps/api/src/core/logging.py
index be200204..f198b8c7 100644
--- a/apps/api/src/core/logging.py
+++ b/apps/api/src/core/logging.py
@@ -11,6 +11,7 @@ Features:
 """
 
 import logging
+import re
 import sys
 from typing import Any
 
@@ -19,6 +20,28 @@ from structlog.types import Processor
 
 from src.core.config import settings
 
+_TELEGRAM_BOT_URL_RE = re.compile(r"(api\.telegram\.org/bot)[^/\s]+")
+
+
+def _redact_sensitive_log_text(text: str) -> str:
+    """遮蔽可能出現在第三方 logger 訊息中的敏感 URL。"""
+    return _TELEGRAM_BOT_URL_RE.sub(r"\1<redacted>", text)
+
+
+class SensitiveURLRedactionFilter(logging.Filter):
+    """標準 logging filter：避免 httpx 等第三方 logger 把 token URL 打進 log。"""
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        record.msg = _redact_sensitive_log_text(str(record.msg))
+        if isinstance(record.args, tuple):
+            record.args = tuple(_redact_sensitive_log_text(str(arg)) for arg in record.args)
+        elif isinstance(record.args, dict):
+            record.args = {
+                key: _redact_sensitive_log_text(str(value))
+                for key, value in record.args.items()
+            }
+        return True
+
 
 def setup_logging() -> None:
     """Configure structlog for the application"""
@@ -68,6 +91,15 @@ def setup_logging() -> None:
         stream=sys.stdout,
         level=logging.getLevelName(settings.LOG_LEVEL),
     )
+    redaction_filter = SensitiveURLRedactionFilter()
+    root_logger = logging.getLogger()
+    root_logger.addFilter(redaction_filter)
+    for handler in root_logger.handlers:
+        handler.addFilter(redaction_filter)
+
+    # httpx INFO 會輸出完整 request URL；Telegram Bot API URL 內含 token。
+    logging.getLogger("httpx").setLevel(logging.WARNING)
+    logging.getLogger("httpcore").setLevel(logging.WARNING)
 
 
 def get_logger(name: str | None = None, **initial_context: Any) -> structlog.BoundLogger:
diff --git a/apps/api/tests/test_logging_redaction.py b/apps/api/tests/test_logging_redaction.py
new file mode 100644
index 00000000..64c62821
--- /dev/null
+++ b/apps/api/tests/test_logging_redaction.py
@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+import logging
+
+from src.core.logging import SensitiveURLRedactionFilter
+
+
+def test_sensitive_url_redaction_filter_redacts_log_record_args() -> None:
+    record = logging.LogRecord(
+        name="httpx",
+        level=logging.INFO,
+        pathname=__file__,
+        lineno=1,
+        msg="HTTP Request: %s",
+        args=("https://api.telegram.org/bot123456:SECRET/getWebhookInfo",),
+        exc_info=None,
+    )
+
+    assert SensitiveURLRedactionFilter().filter(record) is True
+
+    rendered = record.getMessage()
+    assert "SECRET" not in rendered
+    assert "bot<redacted>" in rendered
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index 537fa8c6..2e889972 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -3839,18 +3839,19 @@ ruff check apps/api/tests/test_approval_execution_mcp_audit.py
 | `failover_alerter.py` | 失敗時不再使用 `logger.exception()` 輸出 chained traceback，改記錄已遮蔽的錯誤文字與錯誤類型 |
 | MarkdownV2 | `_lines_from_list()` 將編號句點改為 `1\\.`，並補上 compact 省略文字的 MarkdownV2 escape，避免治理告警清單觸發 Telegram parse 400 |
 | `telegram_gateway.py` | HTTPStatusError 不再 `raise ... from e`，OTel span 也只記 sanitized gateway error，避免 httpx exception 字串帶出 Bot URL |
+| `core/logging.py` | 新增敏感 URL redaction filter，並將 `httpx/httpcore` logger 壓到 WARNING，避免成功 request log 輸出 Telegram Bot API token URL |
 | 測試 | 新增 Telegram error sanitizer 與 MarkdownV2 編號 escape 回歸測試 |
 
 ### 驗證
 
 ```text
-pytest apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py apps/api/tests/test_heartbeat_dedup_p0_4.py -q
-# 17 passed
+pytest apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py apps/api/tests/test_heartbeat_dedup_p0_4.py apps/api/tests/test_logging_redaction.py -q
+# 18 passed
 
-py_compile apps/api/src/services/failover_alerter.py apps/api/src/services/telegram_gateway.py apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py
+py_compile apps/api/src/core/logging.py apps/api/src/services/failover_alerter.py apps/api/src/services/telegram_gateway.py apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py apps/api/tests/test_logging_redaction.py
 # 通過
 
-ruff check apps/api/src/services/failover_alerter.py apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py
+ruff check apps/api/src/core/logging.py apps/api/src/services/failover_alerter.py apps/api/tests/test_failover_alerter.py apps/api/tests/test_telegram_gateway_error_sanitizer.py apps/api/tests/test_logging_redaction.py
 # All checks passed
 ```