diff --git a/lib/Onyx.js b/lib/Onyx.js
index 0c49e3270..c7dd4e3f0 100644
--- a/lib/Onyx.js
+++ b/lib/Onyx.js
@@ -780,6 +780,36 @@ function mergeCollection(collectionKey, collection) {
         });
 }
 
+/**
+ * Insert API responses and lifecycle data into Onyx
+ *
+ * @param {Array} data An array of objects with shape {onyxMethod: oneOf('set', 'merge'), key: string, value: *}
+ */
+function update(data) {
+    // First, validate the Onyx object is in the format we expect
+    _.each(data, ({onyxMethod, key}) => {
+        if (!_.contains(['set', 'merge'], onyxMethod)) {
+            throw new Error(`Invalid onyxMethod ${onyxMethod} in Onyx update.`);
+        }
+        if (!_.isString(key)) {
+            throw new Error(`Invalid ${typeof key} key provided in Onyx update. Onyx key must be of type string.`);
+        }
+    });
+
+    _.each(data, ({onyxMethod, key, value}) => {
+        switch (onyxMethod) {
+            case 'set':
+                set(key, value);
+                break;
+            case 'merge':
+                merge(key, value);
+                break;
+            default:
+                break;
+        }
+    });
+}
+
 /**
  * Initialize the store with actions and listening for storage events
  *
@@ -856,6 +886,7 @@ const Onyx = {
     multiSet,
     merge,
     mergeCollection,
+    update,
     clear,
     init,
     registerLogger,
@@ -883,6 +914,7 @@ function applyDecorators() {
     mergeCollection = decorate.decorateWithMetrics(mergeCollection, 'Onyx:mergeCollection');
     getAllKeys = decorate.decorateWithMetrics(getAllKeys, 'Onyx:getAllKeys');
     initializeWithDefaultKeyStates = decorate.decorateWithMetrics(initializeWithDefaultKeyStates, 'Onyx:defaults');
+    update = decorate.decorateWithMetrics(update, 'Onyx:update');
     /* eslint-enable */
 
     // Re-expose decorated methods
@@ -891,6 +923,7 @@ function applyDecorators() {
     Onyx.clear = clear;
     Onyx.merge = merge;
     Onyx.mergeCollection = mergeCollection;
+    Onyx.update = update;
 
     // Expose stats methods on Onyx
     Onyx.getMetrics = decorate.getMetrics;
diff --git a/tests/unit/onyxTest.js b/tests/unit/onyxTest.js
index d57c066d2..ac7cd4c51 100644
--- a/tests/unit/onyxTest.js
+++ b/tests/unit/onyxTest.js
@@ -306,4 +306,84 @@ describe('Onyx', () => {
                 });
             });
     });
+
+    it('should use update data object to set/merge keys', () => {
+        let testKeyValue;
+        connectionID = Onyx.connect({
+            key: ONYX_KEYS.TEST_KEY,
+            initWithStoredValues: false,
+            callback: (value) => {
+                testKeyValue = value;
+            },
+        });
+
+        let anotherTestKeyValue;
+        connectionID = Onyx.connect({
+            key: ONYX_KEYS.ANOTHER_TEST,
+            initWithStoredValues: false,
+            callback: (value) => {
+                anotherTestKeyValue = value;
+            },
+        });
+
+        return waitForPromisesToResolve()
+            .then(() => {
+                // GIVEN the initial Onyx state: {test: true, anotherTest: {test1: 'test1'}}
+                Onyx.set(ONYX_KEYS.TEST_KEY, true);
+                Onyx.set(ONYX_KEYS.ANOTHER_TEST, {test1: 'test1'});
+                return waitForPromisesToResolve();
+            })
+            .then(() => {
+                expect(testKeyValue).toBe(true);
+                expect(anotherTestKeyValue).toEqual({test1: 'test1'});
+
+                // WHEN we pass a data object to Onyx.update
+                Onyx.update([
+                    {
+                        onyxMethod: 'set',
+                        key: ONYX_KEYS.TEST_KEY,
+                        value: 'one',
+                    },
+                    {
+                        onyxMethod: 'merge',
+                        key: ONYX_KEYS.ANOTHER_TEST,
+                        value: {test2: 'test2'},
+                    },
+                ]);
+                return waitForPromisesToResolve();
+            })
+            .then(() => {
+                // THEN the final Onyx state should be {test: 'one', anotherTest: {test1: 'test1', test2: 'test2'}}
+                expect(testKeyValue).toBe('one');
+                expect(anotherTestKeyValue).toEqual({test1: 'test1', test2: 'test2'});
+            });
+    });
+
+    it('should throw an error when the data object is incorrect in Onyx.update', () => {
+        // GIVEN the invalid data object with onyxMethod='multiSet'
+        const data = [
+            {onyxMethod: 'set', key: ONYX_KEYS.TEST_KEY, value: 'four'},
+            {onyxMethod: 'multiSet', key: ONYX_KEYS.ANOTHER_TEST, value: {test2: 'test2'}}
+        ];
+
+        try {
+            // WHEN we pass it to Onyx.update
+            Onyx.update(data);
+        } catch (error) {
+            // THEN we should expect the error message below
+            expect(error.message).toEqual('Invalid onyxMethod multiSet in Onyx update.');
+        }
+
+        try {
+            // GIVEN the invalid data object with key=true
+            data[1] = {onyxMethod: 'merge', key: true, value: {test2: 'test2'}};
+
+            // WHEN we pass it to Onyx.update
+            Onyx.update(data);
+        } catch (error) {
+            // THEN we should expect the error message below
+            // eslint-disable-next-line max-len
+            expect(error.message).toEqual('Invalid boolean key provided in Onyx update. Onyx key must be of type string.');
+        }
+    });
 });