diff --git a/changelog.d/19896.misc b/changelog.d/19896.misc
new file mode 100644
index 0000000000..2c6a8740ef
--- /dev/null
+++ b/changelog.d/19896.misc
@@ -0,0 +1 @@
+Change the [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814) dehydrated device `/events` endpoint from `POST` to `GET`.
diff --git a/synapse/rest/client/devices.py b/synapse/rest/client/devices.py
index 0231ed374d..76043e6120 100644
--- a/synapse/rest/client/devices.py
+++ b/synapse/rest/client/devices.py
@@ -33,6 +33,7 @@ from synapse.http.servlet import (
     RestServlet,
     parse_and_validate_json_object_from_request,
     parse_integer,
+    parse_string,
 )
 from synapse.http.site import SynapseRequest
 from synapse.rest.client._base import client_patterns, interactive_auth_handler
@@ -249,17 +250,49 @@ class DehydratedDeviceEventsServlet(RestServlet):
         self.auth = hs.get_auth()
         self.store = hs.get_datastores().main
 
+    async def on_GET(
+        self, request: SynapseRequest, device_id: str
+    ) -> tuple[int, JsonDict]:
+        requester = await self.auth.get_user_by_req(request)
+
+        next_batch = parse_string(request, "next_batch")
+        limit = parse_integer(request, "limit", 100)
+
+        msgs = await self.message_handler.get_events_for_dehydrated_device(
+            requester=requester,
+            device_id=device_id,
+            since_token=next_batch,
+            limit=limit,
+        )
+
+        return 200, msgs
+
     class PostBody(RequestBodyModel):
+        """
+        This is deprecated: you should use GET instead.
+
+        The POST version is provided temporarily for backwards compatibility
+        with a previous unstable draft of MSC3814.
+        """
+
         next_batch: StrictStr | None = None
 
     async def on_POST(
         self, request: SynapseRequest, device_id: str
     ) -> tuple[int, JsonDict]:
+        """
+        This is deprecated: you should use GET instead.
+
+        The POST version is provided temporarily for backwards compatibility
+        with a previous unstable draft of MSC3814.
+        """
+
         requester = await self.auth.get_user_by_req(request)
 
         next_batch = parse_and_validate_json_object_from_request(
             request, self.PostBody
         ).next_batch
+
         limit = parse_integer(request, "limit", 100)
 
         msgs = await self.message_handler.get_events_for_dehydrated_device(
diff --git a/tests/rest/client/test_devices.py b/tests/rest/client/test_devices.py
index 2cf293a962..bdf9ad1786 100644
--- a/tests/rest/client/test_devices.py
+++ b/tests/rest/client/test_devices.py
@@ -224,9 +224,8 @@ class DehydratedDeviceTestCase(unittest.HomeserverTestCase):
 
         # make sure we can fetch the message with our dehydrated device id
         channel = self.make_request(
-            "POST",
+            "GET",
             f"_matrix/client/unstable/org.matrix.msc3814.v1/dehydrated_device/{device_id}/events",
-            content={},
             access_token=token,
             shorthand=False,
         )
@@ -236,9 +235,8 @@ class DehydratedDeviceTestCase(unittest.HomeserverTestCase):
 
         # fetch messages again and make sure that the message was not deleted
         channel = self.make_request(
-            "POST",
+            "GET",
             f"_matrix/client/unstable/org.matrix.msc3814.v1/dehydrated_device/{device_id}/events",
-            content={},
             access_token=token,
             shorthand=False,
         )
@@ -248,11 +246,9 @@ class DehydratedDeviceTestCase(unittest.HomeserverTestCase):
 
         # make sure fetching messages with next batch token works - there are no unfetched
         # messages so we should receive an empty array
-        content = {"next_batch": next_batch_token}
         channel = self.make_request(
-            "POST",
-            f"_matrix/client/unstable/org.matrix.msc3814.v1/dehydrated_device/{device_id}/events",
-            content=content,
+            "GET",
+            f"_matrix/client/unstable/org.matrix.msc3814.v1/dehydrated_device/{device_id}/events?next_batch={next_batch_token}",
             access_token=token,
             shorthand=False,
         )