diff --git a/api/client-server/content-repo.yaml b/api/client-server/content-repo.yaml
index 03a25fd9..f76b2fb9 100644
--- a/api/client-server/content-repo.yaml
+++ b/api/client-server/content-repo.yaml
@@ -95,6 +95,15 @@ paths:
           required: true
           description: |
             The media ID from the ``mxc://`` URI (the path component)
+        - in: query
+          type: boolean
+          name: allow_remote
+          x-example: false
+          required: false
+          description: |
+            Indicates to the server that it should not attempt to fetch the media if it is deemed
+            remote. This is to prevent routing loops where the server contacts itself. Defaults to 
+            true if not provided.
       responses:
         200:
           description: "The content that was previously uploaded."
@@ -140,6 +149,15 @@ paths:
           required: true
           description: |
             The filename to give in the Content-Disposition
+        - in: query
+          type: boolean
+          name: allow_remote
+          x-example: false
+          required: false
+          description: |
+            Indicates to the server that it should not attempt to fetch the media if it is deemed
+            remote. This is to prevent routing loops where the server contacts itself. Defaults to 
+            true if not provided.
       responses:
         200:
           description: "The content that was previously uploaded."
@@ -198,6 +216,15 @@ paths:
           name: method
           x-example: "scale"
           description: The desired resizing method.
+        - in: query
+          type: boolean
+          name: allow_remote
+          x-example: false
+          required: false
+          description: |
+            Indicates to the server that it should not attempt to fetch the media if it is deemed
+            remote. This is to prevent routing loops where the server contacts itself. Defaults to 
+            true if not provided.
       responses:
         200:
           description: "A thumbnail of the requested content."
diff --git a/changelogs/client_server.rst b/changelogs/client_server.rst
index 144bd1e8..92d13103 100644
--- a/changelogs/client_server.rst
+++ b/changelogs/client_server.rst
@@ -48,6 +48,8 @@ Unreleased changes
     (`#1142 <https://github.com/matrix-org/matrix-doc/pull/1142>`_).
   - Add the ``/register/available`` endpoint for username availability
     (`#1151 <https://github.com/matrix-org/matrix-doc/pull/1151>`_).
+  - Add ``allow_remote`` to the content repo to avoid routing loops
+    (`#1265 <https://github.com/matrix-org/matrix-doc/pull/1265>`_).
   - Add report content API
     (`#1264 <https://github.com/matrix-org/matrix-doc/pull/1264>`_).
   - Document ``/logout/all`` endpoint