diff --git a/config.sample.json b/config.sample.json
index 1a26289f88..6d9ebe034d 100644
--- a/config.sample.json
+++ b/config.sample.json
@@ -15,6 +15,13 @@
     "brand": "Riot",
     "integrations_ui_url": "https://scalar.vector.im/",
     "integrations_rest_url": "https://scalar.vector.im/api",
+    "integrations_widgets_urls": [
+        "https://scalar.vector.im/_matrix/integrations/v1",
+        "https://scalar.vector.im/api",
+        "https://scalar-staging.vector.im/_matrix/integrations/v1",
+        "https://scalar-staging.vector.im/api",
+        "https://scalar-staging.riot.im/scalar/api"
+    ],
     "integrations_jitsi_widget_url": "https://scalar.vector.im/api/widgets/jitsi.html",
     "bug_report_endpoint_url": "https://riot.im/bugreports/submit",
     "defaultCountryCode": "GB",
diff --git a/docs/labs.md b/docs/labs.md
index 4399d36268..8250bf917c 100644
--- a/docs/labs.md
+++ b/docs/labs.md
@@ -50,3 +50,7 @@ That's it. Now should see your new counter under the header.
 
 An experimental, faster, message composer which should be more reliable and less prone to problems when 
 using your chosen input method.
+
+## Multiple integration managers (`feature_many_integration_managers`)
+
+Exposes a way to access all the integration managers known to Riot. This is an implementation of [MSC1957](https://github.com/matrix-org/matrix-doc/pull/1957).
diff --git a/electron_app/riot.im/config.json b/electron_app/riot.im/config.json
index a995a4e9e3..a2df3da047 100644
--- a/electron_app/riot.im/config.json
+++ b/electron_app/riot.im/config.json
@@ -6,9 +6,11 @@
     "integrations_ui_url": "https://scalar.vector.im/",
     "integrations_rest_url": "https://scalar.vector.im/api",
     "integrations_widgets_urls": [
+        "https://scalar.vector.im/_matrix/integrations/v1",
+        "https://scalar.vector.im/api",
+        "https://scalar-staging.vector.im/_matrix/integrations/v1",
         "https://scalar-staging.vector.im/api",
-        "https://scalar-staging.riot.im/scalar/api",
-        "https://scalar.vector.im/api"
+        "https://scalar-staging.riot.im/scalar/api"
     ],
     "hosting_signup_link": "https://modular.im/?utm_source=riot-web&utm_medium=web",
     "bug_report_endpoint_url": "https://riot.im/bugreports/submit",
diff --git a/riot.im/app/config.json b/riot.im/app/config.json
index fc67720530..164b81c1ae 100644
--- a/riot.im/app/config.json
+++ b/riot.im/app/config.json
@@ -5,8 +5,10 @@
     "integrations_ui_url": "https://scalar.vector.im/",
     "integrations_rest_url": "https://scalar.vector.im/api",
     "integrations_widgets_urls": [
-        "https://scalar-staging.vector.im/api",
+        "https://scalar.vector.im/_matrix/integrations/v1",
         "https://scalar.vector.im/api",
+        "https://scalar-staging.vector.im/_matrix/integrations/v1",
+        "https://scalar-staging.vector.im/api",
         "https://scalar-staging.riot.im/scalar/api"
     ],
     "hosting_signup_link": "https://modular.im/?utm_source=riot-web&utm_medium=web",
diff --git a/riot.im/develop/config.json b/riot.im/develop/config.json
index 69f42dd62e..982d796f89 100644
--- a/riot.im/develop/config.json
+++ b/riot.im/develop/config.json
@@ -5,9 +5,11 @@
     "integrations_ui_url": "https://scalar-staging.vector.im/",
     "integrations_rest_url": "https://scalar-staging.vector.im/api",
     "integrations_widgets_urls": [
-        "https://scalar-staging.riot.im/scalar/api",
+        "https://scalar.vector.im/_matrix/integrations/v1",
+        "https://scalar.vector.im/api",
+        "https://scalar-staging.vector.im/_matrix/integrations/v1",
         "https://scalar-staging.vector.im/api",
-        "https://scalar.vector.im/api"
+        "https://scalar-staging.riot.im/scalar/api"
     ],
     "hosting_signup_link": "https://modular.im/?utm_source=riot-web&utm_medium=web",
     "bug_report_endpoint_url": "https://riot.im/bugreports/submit",
@@ -26,7 +28,8 @@
         "feature_sas": "labs",
         "feature_room_breadcrumbs": "labs",
         "feature_state_counters": "labs",
-        "feature_cider_composer": "labs"
+        "feature_cider_composer": "labs",
+        "feature_many_integration_managers": "labs"
     },
     "welcomeUserId": "@riot-bot:matrix.org",
     "piwik": {