diff --git a/api/server-server/openid.yaml b/api/server-server/openid.yaml
index 0eac48c8..0761618d 100644
--- a/api/server-server/openid.yaml
+++ b/api/server-server/openid.yaml
@@ -33,7 +33,7 @@ paths:
         User ID of the owner.
       operationId: exchangeOpenIdToken
       parameters:
-        - in: path
+        - in: query
           name: access_token
           type: string
           description: |-
diff --git a/changelogs/server_server/newsfragments/1904.clarification b/changelogs/server_server/newsfragments/1904.clarification
new file mode 100644
index 00000000..94174ebd
--- /dev/null
+++ b/changelogs/server_server/newsfragments/1904.clarification
@@ -0,0 +1 @@
+Fix the `access_token` parameter in the open_id endpoint.