docs/api: add missing info on post feature input

1 files changed, 8 insertions, 0 deletions

diff --git a/API.md b/API.md
index 40898d6..f4a1f61 100644
--- a/API.md
+++ b/API.md
@@ -865,6 +865,14 @@ data.
 
     `POST /featured-post`
 
+- **Input**
+
+    ```json5
+    {
+        "id": <post-id>
+    }
+    ```
+
 - **Output**
 
     A [detailed post resource](#detailed-post).