diff --git a/.gitignore b/.gitignore
index 8b1f9b5..e92b37b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,8 +14,8 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
-lib64/
+#lib/
+#lib64/
 parts/
 sdist/
 var/
diff --git a/src/app/lib/__init__.py b/src/app/lib/__init__.py
new file mode 100644
index 0000000..b3a9ca5
--- /dev/null
+++ b/src/app/lib/__init__.py
@@ -0,0 +1 @@
+from .tbank_client import TBankClient
\ No newline at end of file
diff --git a/src/app/lib/base_client/__init__.py b/src/app/lib/base_client/__init__.py
new file mode 100644
index 0000000..433ca53
--- /dev/null
+++ b/src/app/lib/base_client/__init__.py
@@ -0,0 +1,3 @@
+from .client import BaseClient
+from .httpx_client import HTTPXClient
+from .niquests_client import NiquestsClient
diff --git a/src/app/lib/base_client/client.py b/src/app/lib/base_client/client.py
new file mode 100644
index 0000000..45ad8f4
--- /dev/null
+++ b/src/app/lib/base_client/client.py
@@ -0,0 +1,18 @@
+from abc import ABC, abstractmethod
+from typing import Optional
+
+
+class BaseClient(ABC):
+    @abstractmethod
+    async def _method(self, method: str, path: str, data: Optional[dict] = None, params: Optional[dict] = None) -> dict:
+        raise NotImplementedError("_method must be implemented by subclasses")
+
+    @property
+    @abstractmethod
+    def base_url(self) -> str:
+        raise NotImplementedError("Subclasses must implement base_url property")
+
+    @property
+    @abstractmethod
+    def headers(self) -> dict:
+        raise NotImplementedError("Subclasses must implement headers property")
diff --git a/src/app/lib/base_client/httpx_client.py b/src/app/lib/base_client/httpx_client.py
new file mode 100644
index 0000000..859c1d6
--- /dev/null
+++ b/src/app/lib/base_client/httpx_client.py
@@ -0,0 +1,22 @@
+from abc import ABC
+from typing import Optional
+
+import httpx
+
+from .client import BaseClient
+
+
+class HTTPXClient(BaseClient, ABC):
+    async def _method(self, method: str, path: str, data: Optional[dict] = None, params: Optional[dict] = None) -> dict:
+        async with httpx.AsyncClient() as client:
+            url = self.base_url + path
+            headers = self.headers
+            request = client.build_request(
+                method,
+                url,
+                json=data,
+                params=params,
+                headers=headers
+            )
+            response = await client.send(request)
+            return response.json()
diff --git a/src/app/lib/base_client/niquests_client.py b/src/app/lib/base_client/niquests_client.py
new file mode 100644
index 0000000..2973fac
--- /dev/null
+++ b/src/app/lib/base_client/niquests_client.py
@@ -0,0 +1,14 @@
+from abc import ABC
+from typing import Optional
+
+import niquests.async_api
+
+from .client import BaseClient
+
+
+class NiquestsClient(BaseClient, ABC):
+    async def _method(self, method: str, path: str, data: Optional[dict] = None, params: Optional[dict] = None) -> dict:
+        url = self.base_url + path
+        headers = self.headers
+        response = await niquests.async_api.request(method, url, params=params, json=data, headers=headers)
+        return response.json()
diff --git a/src/app/lib/tbank_client/__init__.py b/src/app/lib/tbank_client/__init__.py
new file mode 100644
index 0000000..1d90892
--- /dev/null
+++ b/src/app/lib/tbank_client/__init__.py
@@ -0,0 +1 @@
+from .client import TBankClient
\ No newline at end of file
diff --git a/src/app/lib/tbank_client/client.py b/src/app/lib/tbank_client/client.py
new file mode 100644
index 0000000..c8b6139
--- /dev/null
+++ b/src/app/lib/tbank_client/client.py
@@ -0,0 +1,19 @@
+from typing import Any, Coroutine
+
+from ..base_client import BaseClient, NiquestsClient
+
+
+class TBankClient(NiquestsClient):
+    @property
+    def headers(self) -> dict:
+        return {'Authorization': 'Bearer ' + self.api_key}
+
+    @property
+    def base_url(self) -> str:
+        return "https://business.tbank.ru/openapi/api"
+
+    def __init__(self, api_key: str):
+        self.api_key = api_key
+
+    async def get_counterparty_excerpt_by_inn(self, inn: str) -> dict:
+        return await self._method('GET', '/v1/counterparty/excerpt/by-inn', params={'inn': inn})