diff --git a/seatable_api/__init__.py b/seatable_api/__init__.py
index 5d252a7..8d63c02 100644
--- a/seatable_api/__init__.py
+++ b/seatable_api/__init__.py
@@ -2,6 +2,7 @@
 from .context import context
 from .date_utils import dateutils
 from .convert_airtable import AirtableConvertor
+from .scaledb import ScaleDB
 
 
 Base = SeaTableAPI
diff --git a/seatable_api/exception.py b/seatable_api/exception.py
index f83885a..725891e 100644
--- a/seatable_api/exception.py
+++ b/seatable_api/exception.py
@@ -10,3 +10,10 @@ class BaseUnauthError(ConnectionError):
 
     def __str__(self):
         return "The base has not been authorized"
+
+
+class ScaleDBAPIError(ConnectionError):
+
+    def __init__(self, message, status_code=None):
+        super().__init__(message)
+        self.status_code = status_code
diff --git a/seatable_api/scaledb.py b/seatable_api/scaledb.py
new file mode 100644
index 0000000..d960a3d
--- /dev/null
+++ b/seatable_api/scaledb.py
@@ -0,0 +1,276 @@
+import requests
+
+from .exception import ScaleDBAPIError
+from .utils import parse_headers, parse_server_url
+
+
+def check_auth(func):
+
+    def wrapper(obj, *args, **kwargs):
+        if not obj.is_authed:
+            raise ScaleDBAPIError('ScaleDB has not been authenticated, call auth() first.')
+        return func(obj, *args, **kwargs)
+    return wrapper
+
+
+def parse_seadb_response(response):
+    try:
+        raw = response.json()
+    except ValueError:
+        raw = None
+    data = raw if isinstance(raw, dict) else {}
+    error = data.get('error_message') or data.get('error_msg')
+    if response.status_code >= 400 or response.status_code < 200:
+        raise ScaleDBAPIError(error or '%s %s' % (response.status_code, response.text), response.status_code)
+    if data.get('success') is False or error:
+        raise ScaleDBAPIError(error or 'request failed.', response.status_code)
+    if not isinstance(raw, dict):
+        raise ScaleDBAPIError('invalid response: %s' % response.text, response.status_code)
+    return data
+
+
+class ScaleDB(object):
+    """ScaleDB API
+    """
+
+    def __init__(self, token, server_url):
+        """
+        :param token: str
+        :param server_url: str
+        """
+        self.token = token
+        self.server_url = parse_server_url(server_url)
+        self.seadb_server_url = None
+        self.jwt_token = None
+        self.headers = None
+        self.database_uuid = None
+        self.database_name = None
+        self.permission = None
+        self.timeout = 30
+        self.is_authed = False
+
+    def __str__(self):
+        return '<ScaleDB Database [ %s ]>' % self.database_name
+
+    def auth(self):
+        """Auth to ScaleDB
+        """
+        url = self.server_url + '/api/v2.1/seadb/app-access-token/'
+        headers = parse_headers(self.token)
+        response = requests.get(url, headers=headers, timeout=self.timeout)
+        data = parse_seadb_response(response)
+
+        database_uuid = data.get('database_uuid')
+        seadb_server = data.get('seadb_server')
+        access_token = data.get('access_token')
+        if not database_uuid or not seadb_server or not access_token:
+            raise ScaleDBAPIError('auth response is incomplete.')
+
+        self.seadb_server_url = parse_server_url(seadb_server)
+        self.jwt_token = access_token
+        self.headers = {
+            'Authorization': 'Bearer ' + self.jwt_token,
+            'Content-Type': 'application/json',
+        }
+        self.database_uuid = database_uuid
+        self.database_name = data.get('database_name')
+        self.permission = data.get('permission')
+        self.is_authed = True
+
+    def _query_url(self):
+        return self.seadb_server_url + '/api/v1/' + self.database_uuid + '/query'
+
+    def _rows_url(self):
+        return self.seadb_server_url + '/api/v1/' + self.database_uuid + '/rows'
+
+    def _tables_url(self):
+        return self.seadb_server_url + '/api/v1/' + self.database_uuid + '/tables'
+
+    def _columns_url(self):
+        return self.seadb_server_url + '/api/v1/' + self.database_uuid + '/columns'
+
+    def _column_options_url(self):
+        return self.seadb_server_url + '/api/v1/' + self.database_uuid + '/column-options'
+
+    @check_auth
+    def add_table(self, table_name):
+        """
+        :param table_name: str
+        :return: str, table id
+        """
+        url = self._tables_url()
+        json_data = {
+            'table_name': table_name,
+        }
+        response = requests.post(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        data = parse_seadb_response(response)
+        return data.get('table_id')
+
+    @check_auth
+    def rename_table(self, table_name, new_table_name):
+        """
+        :param table_name: str
+        :param new_table_name: str
+        :return: dict
+        """
+        url = self._tables_url()
+        json_data = {
+            'table_name': table_name,
+            'new_table_name': new_table_name,
+        }
+        response = requests.put(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def delete_table(self, table_name):
+        """
+        :param table_name: str
+        :return: dict
+        """
+        url = self._tables_url()
+        json_data = {
+            'table_name': table_name,
+        }
+        response = requests.delete(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def insert_column(self, table_name, column_name, column_type, column_data=None):
+        """
+        :param table_name: str
+        :param column_name: str
+        :param column_type: str, text/int64/float64/float32/bool/datetime/single-select/multiple-select/list
+        :param column_data: dict
+        :return: str, column key
+        """
+        url = self._columns_url()
+        json_data = {
+            'table_name': table_name,
+            'column_name': column_name,
+            'column_type': column_type,
+        }
+        if column_data:
+            json_data['column_data'] = column_data
+        response = requests.post(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        data = parse_seadb_response(response)
+        return data.get('column_key')
+
+    @check_auth
+    def rename_column(self, table_name, column_name, new_column_name):
+        """
+        :param table_name: str
+        :param column_name: str
+        :param new_column_name: str
+        :return: dict
+        """
+        url = self._columns_url()
+        json_data = {
+            'table_name': table_name,
+            'column_name': column_name,
+            'new_column_name': new_column_name,
+        }
+        response = requests.put(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def delete_column(self, table_name, column_name):
+        """
+        :param table_name: str
+        :param column_name: str
+        :return: dict
+        """
+        url = self._columns_url()
+        json_data = {
+            'table_name': table_name,
+            'column_name': column_name,
+        }
+        response = requests.delete(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def add_column_option(self, table_name, column_name, option_name, option_data=None):
+        """
+        :param table_name: str
+        :param column_name: str
+        :param option_name: str
+        :param option_data: dict
+        :return: str, option id
+        """
+        url = self._column_options_url()
+        json_data = {
+            'table_name': table_name,
+            'column_name': column_name,
+            'option_name': option_name,
+        }
+        if option_data:
+            json_data['option_data'] = option_data
+        response = requests.post(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        data = parse_seadb_response(response)
+        return data.get('option_id')
+
+    @check_auth
+    def query(self, sql, convert=True, parameters=None):
+        """
+        :param sql: str
+        :param convert: bool
+        :param parameters: list
+        :return: list
+        """
+        if not sql:
+            raise ValueError('sql can not be empty.')
+        url = self._query_url()
+        json_data = {
+            'sql': sql,
+            'parameters': parameters or [],
+            'convert_keys': bool(convert),
+        }
+        response = requests.post(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        data = parse_seadb_response(response)
+        return data.get('results') or []
+
+    @check_auth
+    def insert_rows(self, table_name, rows, replace=False):
+        """
+        :param table_name: str
+        :param rows: list
+        :param replace: bool
+        :return: dict
+        """
+        url = self._rows_url()
+        json_data = {
+            'table_name': table_name,
+            'rows': rows,
+            'replace': replace,
+        }
+        response = requests.post(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def update_rows(self, table_name, updates):
+        """
+        :param table_name: str
+        :param updates: list, [{'pk': int, 'row': dict}]
+        :return: dict
+        """
+        url = self._rows_url()
+        json_data = {
+            'table_name': table_name,
+            'updates': updates,
+        }
+        response = requests.put(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)
+
+    @check_auth
+    def delete_rows(self, table_name, pks):
+        """
+        :param table_name: str
+        :param pks: list
+        :return: dict
+        """
+        url = self._rows_url()
+        json_data = {
+            'table_name': table_name,
+            'pks': pks,
+        }
+        response = requests.delete(url, json=json_data, headers=self.headers, timeout=self.timeout)
+        return parse_seadb_response(response)