2 files changed, 10 insertions, 1 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index f9a49451d8..4009add01d 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Any
+from typing import Any, Optional
 
 import attr
 
@@ -120,3 +120,8 @@ class ExperimentalConfig(Config):
 
         # MSC3874: Filtering /messages with rel_types / not_rel_types.
         self.msc3874_enabled: bool = experimental.get("msc3874_enabled", False)
+
+        # MSC3886: Simple client rendezvous capability
+        self.msc3886_endpoint: Optional[str] = experimental.get(
+            "msc3886_endpoint", None
+        )
diff --git a/synapse/config/server.py b/synapse/config/server.py
index f2353ce5fb..ec46ca63ad 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -207,6 +207,9 @@ class HttpListenerConfig:
     additional_resources: Dict[str, dict] = attr.Factory(dict)
     tag: Optional[str] = None
     request_id_header: Optional[str] = None
+    # If true, the listener will return CORS response headers compatible with MSC3886:
+    # https://github.com/matrix-org/matrix-spec-proposals/pull/3886
+    experimental_cors_msc3886: bool = False
 
 
 @attr.s(slots=True, frozen=True, auto_attribs=True)
@@ -935,6 +938,7 @@ def parse_listener_def(num: int, listener: Any) -> ListenerConfig:
             additional_resources=listener.get("additional_resources", {}),
             tag=listener.get("tag"),
             request_id_header=listener.get("request_id_header"),
+            experimental_cors_msc3886=listener.get("experimental_cors_msc3886", False),
         )
 
     return ListenerConfig(port, bind_addresses, listener_type, tls, http_config)