diff --git a/README.md b/README.md
index 9a6868c9..405996c6 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ DbGate is licensed under GPL-3.0 license and is free to use for any purpose.
 * Try it online - [demo.dbgate.org](https://demo.dbgate.org) - online demo application
 * **Download** application for Windows, Linux or Mac from [dbgate.org](https://dbgate.org/download/)
 * Run web version as [NPM package](https://www.npmjs.com/package/dbgate-serve) or as [docker image](https://hub.docker.com/r/dbgate/dbgate)
+* Use nodeJs [scripting interface](https://dbgate.org/docs/scripting.html) ([API documentation](https://dbgate.org/docs/apidoc.html))
 
 ## Supported databases
 * MySQL
diff --git a/packages/api/src/shell/executeQuery.js b/packages/api/src/shell/executeQuery.js
index 4d7bd6c8..8dcdc1ab 100644
--- a/packages/api/src/shell/executeQuery.js
+++ b/packages/api/src/shell/executeQuery.js
@@ -5,6 +5,16 @@ const { getLogger, getLimitedQuery } = require('dbgate-tools');
 
 const logger = getLogger('execQuery');
 
+/**
+ * Executes SQL query
+ * @param {object} options
+ * @param {connectionType} options.connection - connection object
+ * @param {object} options.systemConnection - system connection (result of driver.connect)
+ * @param {object} options.driver - driver object
+ * @param {string} options.sql - SQL query
+ * @param {string} options.sqlFile - SQL file
+ * @param {boolean} options.logScriptItems - whether to log script items instead of whole script
+ */
 async function executeQuery({
   connection = undefined,
   systemConnection = undefined,
diff --git a/packages/api/src/shell/tableReader.js b/packages/api/src/shell/tableReader.js
index cc5f88a9..373b9ce1 100644
--- a/packages/api/src/shell/tableReader.js
+++ b/packages/api/src/shell/tableReader.js
@@ -3,6 +3,15 @@ const requireEngineDriver = require('../utility/requireEngineDriver');
 const connectUtility = require('../utility/connectUtility');
 const logger = getLogger('tableReader');
 
+/**
+ * Creates reader object for {@link copyStream} function. This reader object reads data from table or view.
+ * @param {object} options
+ * @param {connectionType} options.connection - connection object
+ * @param {object} options.systemConnection - system connection (result of driver.connect)
+ * @param {string} options.pureName - table name
+ * @param {string} options.schemaName - schema name
+ * @returns {Promise<readerType>} - reader object
+ */
 async function tableReader({ connection, systemConnection, pureName, schemaName }) {
   const driver = requireEngineDriver(connection);
   const dbhan = systemConnection || (await connectUtility(driver, connection, 'read'));
diff --git a/packages/api/src/shell/tableWriter.js b/packages/api/src/shell/tableWriter.js
index b22bf088..90a5b579 100644
--- a/packages/api/src/shell/tableWriter.js
+++ b/packages/api/src/shell/tableWriter.js
@@ -3,6 +3,20 @@ const requireEngineDriver = require('../utility/requireEngineDriver');
 const connectUtility = require('../utility/connectUtility');
 const logger = getLogger('tableWriter');
 
+/**
+ * Creates writer object for {@link copyStream} function. This writer object writes data to table. Table could be created if not exists.
+ * @param {object} options
+ * @param {connectionType} options.connection - connection object
+ * @param {object} options.systemConnection - system connection (result of driver.connect)
+ * @param {string} options.pureName - table name
+ * @param {string} options.schemaName - schema name
+ * @param {object} options.driver - driver object
+ * @param {boolean} options.dropIfExists - drop table if exists
+ * @param {boolean} options.truncate - truncate table before insert
+ * @param {boolean} options.createIfNotExists - create table if not exists
+ * @param {boolean} options.commitAfterInsert - commit transaction after insert
+ * @returns {Promise<writerType>} - writer object
+ */
 async function tableWriter({ connection, schemaName, pureName, driver, systemConnection, ...options }) {
   logger.info(`Writing table ${fullNameToString({ schemaName, pureName })}`);
 
diff --git a/packages/api/src/shell/types.js b/packages/api/src/shell/types.js
index a3352c3f..ebdc4574 100644
--- a/packages/api/src/shell/types.js
+++ b/packages/api/src/shell/types.js
@@ -1,12 +1,27 @@
 /**
  * Reader (input) object for copyStream function
  * @typedef {Object} readerType
- * 
+ *
  */
 
 /**
- * Wrtiter (output) object for copyStream function
+ * Writer (output) object for copyStream function
  * @typedef {Object} writerType
- * 
+ *
  */
 
+/**
+ * Typ uživatelské role.
+ * @typedef {('mysql@dbgate-plugin-mysql' | 'mariadb@dbgate-plugin-mysql' | 'postgres@dbgate-plugin-postgres'
+ *      |'sqlite@dbgate-plugin-sqlite' | 'oracle@dbgate-plugin-oracle' | 'cockroach@dbgate-plugin-postgres' | 'redshift@dbgate-plugin-postgres')} engineType
+ */
+
+/**
+ * @typedef {Object} connectionType
+ * @property {engineType} engine
+ * @property {string} server
+ * @property {string} user
+ * @property {string} password
+ * @property {string} database
+ * @property {string} port
+ */