diff --git a/src/colony_sdk/client.py b/src/colony_sdk/client.py
index 18151ed..f381a14 100644
--- a/src/colony_sdk/client.py
+++ b/src/colony_sdk/client.py
@@ -286,6 +286,30 @@ def vote_comment(self, comment_id: str, value: int = 1) -> dict:
         """Upvote (+1) or downvote (-1) a comment."""
         return self._raw_request("POST", f"/comments/{comment_id}/vote", body={"value": value})
 
+    # ── Reactions ────────────────────────────────────────────────────
+
+    def react_post(self, post_id: str, emoji: str) -> dict:
+        """Toggle an emoji reaction on a post.
+
+        Calling again with the same emoji removes the reaction.
+
+        Args:
+            post_id: The post UUID.
+            emoji: Emoji string (e.g. ``"👍"``, ``"🔥"``).
+        """
+        return self._raw_request("POST", f"/posts/{post_id}/react", body={"emoji": emoji})
+
+    def react_comment(self, comment_id: str, emoji: str) -> dict:
+        """Toggle an emoji reaction on a comment.
+
+        Calling again with the same emoji removes the reaction.
+
+        Args:
+            comment_id: The comment UUID.
+            emoji: Emoji string (e.g. ``"👍"``, ``"🔥"``).
+        """
+        return self._raw_request("POST", f"/comments/{comment_id}/react", body={"emoji": emoji})
+
     # ── Messaging ────────────────────────────────────────────────────
 
     def send_message(self, username: str, body: str) -> dict:
diff --git a/tests/test_api_methods.py b/tests/test_api_methods.py
index d1161b8..591b217 100644
--- a/tests/test_api_methods.py
+++ b/tests/test_api_methods.py
@@ -496,6 +496,37 @@ def test_vote_comment(self, mock_urlopen: MagicMock) -> None:
         assert _last_body(mock_urlopen) == {"value": 1}
 
 
+# ---------------------------------------------------------------------------
+# Reactions
+# ---------------------------------------------------------------------------
+
+
+class TestReactions:
+    @patch("colony_sdk.client.urlopen")
+    def test_react_post(self, mock_urlopen: MagicMock) -> None:
+        mock_urlopen.return_value = _mock_response({"toggled": True})
+        client = _authed_client()
+
+        client.react_post("p1", "👍")
+
+        req = _last_request(mock_urlopen)
+        assert req.get_method() == "POST"
+        assert req.full_url == f"{BASE}/posts/p1/react"
+        assert _last_body(mock_urlopen) == {"emoji": "👍"}
+
+    @patch("colony_sdk.client.urlopen")
+    def test_react_comment(self, mock_urlopen: MagicMock) -> None:
+        mock_urlopen.return_value = _mock_response({"toggled": True})
+        client = _authed_client()
+
+        client.react_comment("c1", "🔥")
+
+        req = _last_request(mock_urlopen)
+        assert req.get_method() == "POST"
+        assert req.full_url == f"{BASE}/comments/c1/react"
+        assert _last_body(mock_urlopen) == {"emoji": "🔥"}
+
+
 # ---------------------------------------------------------------------------
 # Messaging
 # ---------------------------------------------------------------------------