diff --git a/changelogs/client_server/newsfragments/3238.clarification b/changelogs/client_server/newsfragments/3238.clarification
new file mode 100644
index 00000000..63e54ba6
--- /dev/null
+++ b/changelogs/client_server/newsfragments/3238.clarification
@@ -0,0 +1 @@
+Clarify that all request bodies are required.
diff --git a/data/api/client-server/receipts.yaml b/data/api/client-server/receipts.yaml
index 716946ac..66610092 100644
--- a/data/api/client-server/receipts.yaml
+++ b/data/api/client-server/receipts.yaml
@@ -61,6 +61,7 @@ paths:
           description: |-
             Extra receipt information to attach to `content` if any. The
             server will automatically set the `ts` field.
+          required: true
           schema:
             type: object
             example: {
diff --git a/data/api/client-server/report_content.yaml b/data/api/client-server/report_content.yaml
index 380995ea..19d6b6d0 100644
--- a/data/api/client-server/report_content.yaml
+++ b/data/api/client-server/report_content.yaml
@@ -49,6 +49,7 @@ paths:
           x-example: "$something:example.org"
         - in: body
           name: body
+          required: true
           schema:
             type: object
             example: {
diff --git a/data/api/client-server/room_send.yaml b/data/api/client-server/room_send.yaml
index c22fcfe4..18658f61 100644
--- a/data/api/client-server/room_send.yaml
+++ b/data/api/client-server/room_send.yaml
@@ -65,6 +65,7 @@ paths:
           x-example: "35"
         - in: body
           name: body
+          required: true
           schema:
             type: object
             example: {
diff --git a/data/api/client-server/room_state.yaml b/data/api/client-server/room_state.yaml
index 381c5c57..016a8273 100644
--- a/data/api/client-server/room_state.yaml
+++ b/data/api/client-server/room_state.yaml
@@ -74,6 +74,7 @@ paths:
           x-example: "@alice:example.com"
         - in: body
           name: body
+          required: true
           schema:
             type: object
             example: {
diff --git a/data/api/client-server/users.yaml b/data/api/client-server/users.yaml
index 255c538b..31bc971c 100644
--- a/data/api/client-server/users.yaml
+++ b/data/api/client-server/users.yaml
@@ -47,6 +47,7 @@ paths:
       parameters:
         - in: body
           name: body
+          required: true
           schema:
             type: object
             properties: