diff --git a/.hark/changes/2026-09-15_zacchua_add-stripe-suppress-notices.change.md b/.hark/changes/2026-09-15_zacchua_add-stripe-suppress-notices.change.md
new file mode 100644
index 000000000..40261bc43
--- /dev/null
+++ b/.hark/changes/2026-09-15_zacchua_add-stripe-suppress-notices.change.md
@@ -0,0 +1,7 @@
+---
+title: Allow suppressing Stripe notices
+pr_url: https://github.com/stripe/stripe-python/pull/1909
+semver_level: minor
+---
+
+Set the `STRIPE_SUPPRESS_NOTICES` environment variable to `true` to suppress Stripe notices in test and sandbox environments when not running under a detected AI agent. Notices remain enabled by default and continue to be shown to AI agents.
diff --git a/stripe/_api_requestor.py b/stripe/_api_requestor.py
index e0f22186d..37f2011db 100644
--- a/stripe/_api_requestor.py
+++ b/stripe/_api_requestor.py
@@ -72,12 +72,31 @@
 _default_proxy: Optional[str] = None
 
 
-def _maybe_emit_stripe_notice(rheaders: Mapping[str, str]) -> None:
+def _maybe_emit_stripe_notice(
+    rheaders: Mapping[str, str],
+    environ: Optional[Mapping[str, str]] = None,
+) -> None:
     notice = rheaders.get("Stripe-Notice")
-    if notice:
-        import warnings
+    if not notice:
+        return
+
+    environ = os.environ if environ is None else environ
+    ai_agent = _APIRequestor._detect_ai_agent(environ)
+    if (
+        not ai_agent
+        and environ.get("STRIPE_SUPPRESS_NOTICES", "").lower() == "true"
+    ):
+        return
+
+    if not ai_agent:
+        notice += (
+            "\nTo suppress Stripe notices in test and sandbox environments, "
+            "set the STRIPE_SUPPRESS_NOTICES environment variable to true."
+        )
+
+    import warnings
 
-        warnings.warn(notice)
+    warnings.warn(notice)
 
 
 def is_v2_delete_resp(method: str, api_mode: ApiMode) -> bool:
diff --git a/tests/test_api_requestor.py b/tests/test_api_requestor.py
index c49803c46..744930ed9 100644
--- a/tests/test_api_requestor.py
+++ b/tests/test_api_requestor.py
@@ -11,7 +11,11 @@
 
 import stripe
 import io
-from stripe._api_requestor import _api_encode, _APIRequestor
+from stripe._api_requestor import (
+    _api_encode,
+    _APIRequestor,
+    _maybe_emit_stripe_notice,
+)
 from stripe._customer import Customer
 from stripe._request_options import RequestOptions
 from stripe._requestor_options import (
@@ -1077,6 +1081,55 @@ def test_stripe_notice_header_emits_warning(
         with pytest.warns(UserWarning, match="test notice value"):
             requestor.request("get", self.v1_path, {}, base_address="api")
 
+    def test_stripe_notice_tells_humans_how_to_suppress_notices(self):
+        with pytest.warns(UserWarning) as warning:
+            _maybe_emit_stripe_notice(
+                {"Stripe-Notice": "test notice value"}, {}
+            )
+
+        assert str(warning[0].message) == (
+            "test notice value\n"
+            "To suppress Stripe notices in test and sandbox environments, "
+            "set the STRIPE_SUPPRESS_NOTICES environment variable to true."
+        )
+
+    @pytest.mark.parametrize("suppression_value", ["true", "TRUE"])
+    def test_stripe_notice_can_be_suppressed_for_humans(
+        self, suppression_value
+    ):
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("error")
+            _maybe_emit_stripe_notice(
+                {"Stripe-Notice": "test notice value"},
+                {"STRIPE_SUPPRESS_NOTICES": suppression_value},
+            )
+
+    @pytest.mark.parametrize(
+        "suppression_value", ["", "false", "1", "invalid"]
+    )
+    def test_stripe_notice_is_not_suppressed_for_other_values(
+        self, suppression_value
+    ):
+        with pytest.warns(UserWarning):
+            _maybe_emit_stripe_notice(
+                {"Stripe-Notice": "test notice value"},
+                {"STRIPE_SUPPRESS_NOTICES": suppression_value},
+            )
+
+    def test_stripe_notice_is_not_suppressed_for_ai_agents(self):
+        with pytest.warns(UserWarning) as warning:
+            _maybe_emit_stripe_notice(
+                {"Stripe-Notice": "test notice value"},
+                {
+                    "STRIPE_SUPPRESS_NOTICES": "true",
+                    "CODEX_SANDBOX": "1",
+                },
+            )
+
+        assert str(warning[0].message) == "test notice value"
+
     @pytest.mark.anyio
     async def test_stripe_notice_header_emits_warning_async(
         self, requestor, http_client_mock