diff --git a/.gitignore b/.gitignore
index 2700ad5c2..b7a7398ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@ web_custom_versions/
 openapi.yaml
 filtered-openapi.yaml
 uv.lock
+.comfy_environment
diff --git a/comfy/deploy_environment.py b/comfy/deploy_environment.py
new file mode 100644
index 000000000..b4684b363
--- /dev/null
+++ b/comfy/deploy_environment.py
@@ -0,0 +1,33 @@
+import logging
+import os
+
+import folder_paths
+
+logger = logging.getLogger(__name__)
+
+_DEFAULT_DEPLOY_ENV = "local_git"
+_ENV_FILENAME = ".comfy_environment"
+
+_cached_value: str | None = None
+
+
+def get_deploy_environment() -> str:
+    global _cached_value
+    if _cached_value is not None:
+        return _cached_value
+
+    env_file = os.path.join(folder_paths.base_path, _ENV_FILENAME)
+    try:
+        with open(env_file, encoding="utf-8") as f:
+            first_line = f.readline().strip()
+            value = "".join(c for c in first_line if 32 <= ord(c) < 127)
+            if value:
+                _cached_value = value
+                return _cached_value
+    except FileNotFoundError:
+        pass
+    except Exception as e:
+        logger.warning("Failed to read %s: %s", env_file, e)
+
+    _cached_value = _DEFAULT_DEPLOY_ENV
+    return _cached_value
diff --git a/comfy_api_nodes/util/client.py b/comfy_api_nodes/util/client.py
index 9d730b81a..f09383dc1 100644
--- a/comfy_api_nodes/util/client.py
+++ b/comfy_api_nodes/util/client.py
@@ -19,6 +19,8 @@ from comfy import utils
 from comfy_api.latest import IO
 from server import PromptServer
 
+from comfy.deploy_environment import get_deploy_environment
+
 from . import request_logger
 from ._helpers import (
     default_base_url,
@@ -617,6 +619,7 @@ async def _request_base(cfg: _RequestConfig, expect_binary: bool):
         payload_headers = {"Accept": "*/*"} if expect_binary else {"Accept": "application/json"}
         if not parsed_url.scheme and not parsed_url.netloc:  # is URL relative?
             payload_headers.update(get_auth_header(cfg.node_cls))
+            payload_headers["X-Comfy-Env"] = get_deploy_environment()
         if cfg.endpoint.headers:
             payload_headers.update(cfg.endpoint.headers)