diff --git a/deltachat-ffi/deltachat.h b/deltachat-ffi/deltachat.h
index e8bdb1c4e..6b3e9dd4a 100644
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -982,6 +982,64 @@ uint32_t        dc_send_text_msg             (dc_context_t* context, uint32_t ch
 uint32_t dc_send_videochat_invitation (dc_context_t* context, uint32_t chat_id);
 
 
+/**
+ * An w30 instance send a status update to its other members.
+ *
+ * In js-land, that would be mapped to sth. as:
+ * ```
+ * success = window.webxdc.sendUpdate('move A3 B4', '{"action":"move","src":"A3","dest":"B4"}');
+ * ```
+ * `context` and `msg_id` is not needed in js as that is unique within an w30 instance.
+ * See dc_get_w30_status_updates() for the receiving counterpart.
+ *
+ * If the w30 instance is a draft, the update is not send immediately.
+ * Instead, the updates are collected and sent out in batch when the instance is actually sent.
+ * This allows preparing w30 instances,
+ * eg. defining a poll with predefined answers.
+ *
+ * Other members will be informed by #DC_EVENT_W30_STATUS_UPDATE that there is a new update.
+ * You will also get the #DC_EVENT_W30_STATUS_UPDATE yourself
+ * and the update you're sent will also be included in dc_get_w30_status_updates().
+ *
+ * @memberof dc_context_t
+ * @param context The context object
+ * @param msg_id id of the message with the w30 instance
+ * @param descr user-visible description of the json-data,
+ *     in case of a chess game, eg. the move.
+ * @param json program-readable data, the actual payload
+ * @return 1=success, 0=error
+ */
+int dc_send_w30_status_update (dc_context_t* context, uint32_t msg_id, const char* descr, const char* json);
+
+
+/**
+ * Get status updates.
+ * The status updates may be sent by yourself or by other members using dc_send_w30_status_update().
+ * In both cases, you will be informed by #DC_EVENT_W30_STATUS_UPDATE
+ * whenever there is a new update.
+ *
+ * In js-land, that would be mapped to sth. as:
+ * ```
+ * window.webxdc.setUpdateListener((update) => {
+ *    if (update.payload.action === "move") {
+ *       print(update.payload.src)
+ *       print(update.payload.dest)
+ *    }
+ * });
+ * ```
+ *
+ * @memberof dc_context_t
+ * @param context The context object
+ * @param msg_id id of the message with the w30 instance
+ * @param status_update_id Can be used to filter out only a concrete status update.
+ *     When set to 0, all known status updates are returned.
+ * @return JSON-array containing the requested updates,
+ *     each element was created by dc_send_w30_status_update()
+ *     on this or other devices.
+ *     If there are no updates, an empty JSON-array is returned.
+ */
+char* dc_get_w30_status_updates (dc_context_t* context, uint32_t msg_id, uint32_t status_update_id);
+
 /**
  * Save a draft for a chat in the database.
  *
@@ -4774,6 +4832,16 @@ int64_t          dc_lot_get_timestamp     (const dc_lot_t* lot);
  */
 #define DC_MSG_VIDEOCHAT_INVITATION 70
 
+
+/**
+ * w30-Message.
+ * Message with HTML5, CSS and related content.
+ *
+ * To send data to a w30 instance, use dc_send_w30_status_update()
+ */
+#define DC_MSG_W30    80
+
+
 /**
  * @}
  */
@@ -5467,6 +5535,21 @@ void dc_event_unref(dc_event_t* event);
 #define DC_EVENT_SELFAVATAR_CHANGED               2110
 
 
+/**
+ * w30 status update received.
+ * To get the received status update, use dc_get_w30_status_updates().
+ * To send status updates, use dc_send_w30_status_update().
+ *
+ * Note, that you do not get events that arrive when the app is not running;
+ * instead, you can use dc_get_w30_status_updates() to get all status updates
+ * and catch up that way.
+ *
+ * @param data1 (int) msg_id
+ * @param data2 (int) status_update_id
+ */
+#define DC_EVENT_W30_STATUS_UPDATE                2120
+
+
 /**
  * @}
  */