diff --git a/clearml_agent/backend_api/session/defs.py b/clearml_agent/backend_api/session/defs.py
index d49f920..9f66d7f 100644
--- a/clearml_agent/backend_api/session/defs.py
+++ b/clearml_agent/backend_api/session/defs.py
@@ -18,3 +18,12 @@ ENV_ENABLE_FILES_CONFIG_SECTION = EnvEntry('CLEARML_AGENT_ENABLE_FILES_CONFIG_SE
 ENV_INITIAL_CONNECT_RETRY_OVERRIDE = EnvEntry(
     'CLEARML_AGENT_INITIAL_CONNECT_RETRY_OVERRIDE', default=True, converter=safe_text_to_bool
 )
+
+"""
+Experimental option to set the request method for all API requests and auth login.
+This could be useful when GET requests with payloads are blocked by a server as
+POST requests can be used instead.
+
+However this has not been vigorously tested and may have unintended consequences.
+"""
+ENV_API_DEFAULT_REQ_METHOD = EnvEntry("CLEARML_API_DEFAULT_REQ_METHOD")
\ No newline at end of file
diff --git a/clearml_agent/backend_api/session/request.py b/clearml_agent/backend_api/session/request.py
index 7640b5a..028d9e4 100644
--- a/clearml_agent/backend_api/session/request.py
+++ b/clearml_agent/backend_api/session/request.py
@@ -5,10 +5,16 @@ import six
 
 from .apimodel import ApiModel
 from .datamodel import DataModel
+from .defs import ENV_API_DEFAULT_REQ_METHOD
 
 
+if ENV_API_DEFAULT_REQ_METHOD.get().upper() not in ("GET", "POST"):
+    raise ValueError(
+        "CLEARML_API_DEFAULT_REQ_METHOD environment variable must be 'get' or 'post' (any case is allowed)."
+    )
+
 class Request(ApiModel):
-    _method = 'get'
+    _method = ENV_API_DEFAULT_REQ_METHOD.get(default="get")
 
     def __init__(self, **kwargs):
         if kwargs:
diff --git a/clearml_agent/backend_api/session/session.py b/clearml_agent/backend_api/session/session.py
index b36f980..4a245f6 100644
--- a/clearml_agent/backend_api/session/session.py
+++ b/clearml_agent/backend_api/session/session.py
@@ -15,7 +15,7 @@ from six.moves.urllib.parse import urlparse, urlunparse
 
 from .callresult import CallResult
 from .defs import ENV_VERBOSE, ENV_HOST, ENV_ACCESS_KEY, ENV_SECRET_KEY, ENV_WEB_HOST, ENV_FILES_HOST, ENV_AUTH_TOKEN, \
-    ENV_NO_DEFAULT_SERVER, ENV_DISABLE_VAULT_SUPPORT, ENV_INITIAL_CONNECT_RETRY_OVERRIDE
+    ENV_NO_DEFAULT_SERVER, ENV_DISABLE_VAULT_SUPPORT, ENV_INITIAL_CONNECT_RETRY_OVERRIDE, ENV_API_DEFAULT_REQ_METHOD
 from .request import Request, BatchRequest
 from .token_manager import TokenManager
 from ..config import load
@@ -615,6 +615,7 @@ class Session(TokenManager):
         try:
             data = {"expiration_sec": exp} if exp else {}
             res = self._send_request(
+                method=ENV_API_DEFAULT_REQ_METHOD.get(default="get"),
                 service="auth",
                 action="login",
                 auth=auth,