diff --git a/docs/rbtools/rbt/commands/close.rst b/docs/rbtools/rbt/commands/close.rst
index ec97ffe83def04c75104d7f9771ed2d75b6bc6d0..30dbb57c956cefe7a6abbd0f1b993ba082aabb61 100644
--- a/docs/rbtools/rbt/commands/close.rst
+++ b/docs/rbtools/rbt/commands/close.rst
@@ -11,4 +11,86 @@ option.
 
 
 .. rbt-command-usage::
+
+
+.. _rbt-close-json:
+
+JSON Output
+===========
+
+.. versionadded:: 3.0
+
+When running with :option:`--json`, the result of the close operation will be
+outputted as JSON. This can be used by programs that wrap RBTools in order to
+automate closing review requests.
+
+
+Successful Payloads
+-------------------
+
+When closing is successful, the results are in the form of:
+
+.. code-block:: javascript
+
+   {
+       "status": "success",
+
+       // The resulting close type ("submitted" or "discarded").
+       "close_type": "<string>",
+
+       // The provided close description.
+       "description": "<string>",
+
+       // The ID of the review request.
+       "review_request_id": <int>,
+
+       // The URL of the review request.
+       "review_request_url": "<string>"
+   }
+
+For example:
+
+.. code-block:: console
+
+   $ rbt close --json --description "Committed to release-6.x" 123
+   {
+       "close_type": "submitted",
+       "description": "Committed to release-6.x",
+       "review_request_id": 123,
+       "review_request_url": "https://example.com/r/123/"
+   }
+
+
+Error Payloads
+--------------
+
+When there's an error closing a review request (for instance, if it's already
+closed), the results will be in the form of:
+
+.. code-block:: javascript
+
+   {
+       "status": "failed",
+
+       // A list of errors from the operation.
+       "errors": [
+           "<string>",
+           ...
+       ]
+   }
+
+For example:
+
+.. code-block:: console
+
+   $ rbt close --json 123
+
+   {
+       "errors": [
+           "Review request #123 is already submitted."
+       ],
+       "status": "failed"
+   }
+
+
 .. rbt-command-options::