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diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/restapi/RestModifyView.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/restapi/RestModifyView.java
new file mode 100644
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+++ b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/restapi/RestModifyView.java
@@ -0,0 +1,46 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.extensions.restapi;
+
+/**
+ * RestView that supports accepting input and changing a resource.
+ * <p>
+ * The input must be supplied as JSON as the body of the HTTP request. Modify
+ * views can be invoked by any HTTP method that is not {@code GET}, which
+ * includes {@code POST}, {@code PUT}, {@code DELETE}.
+ *
+ * @param <R> type of the resource the view modifies.
+ * @param <I> type of input the JSON parser will parse the input into.
+ */
+public interface RestModifyView<R extends RestResource, I> extends RestView<R> {
+  /**
+   * Process the view operation by altering the resource.
+   *
+   * @param resource resource to modify.
+   * @param input input after parsing from request.
+   * @return result to return to the client. Use {@link BinaryResult} to avoid
+   *         automatic conversion to JSON.
+   * @throws AuthException the client is not permitted to access this view.
+   * @throws BadRequestException the request was incorrectly specified and
+   *         cannot be handled by this view.
+   * @throws ResourceConflictException the resource state does not permit this
+   *         view to make the changes at this time.
+   * @throws Exception the implementation of the view failed. The exception will
+   *         be logged and HTTP 500 Internal Server Error will be returned to
+   *         the client.
+   */
+  Object apply(R resource, I input) throws AuthException, BadRequestException,
+      ResourceConflictException, Exception;
+}