diff --git a/apps/api/api/app.py b/apps/api/api/app.py
index 62a04f3..7246f25 100644
--- a/apps/api/api/app.py
+++ b/apps/api/api/app.py
@@ -3,7 +3,7 @@ from gevent.pywsgi import WSGIServer
 from helpers import access_token_required
 import config
 
-from checkers import HttpChecker, ICMPChecker
+from checkers import HttpChecker, ICMPChecker, TCPPortChecker
 
 app = Flask(__name__)
 
@@ -22,6 +22,20 @@ def http_check():
     return jsonify(checker.check())
 
 
+@app.route('/tcp_port')
+@access_token_required
+def tcp_port_check():
+    target = request.args.get("target", None)
+    port = int(request.args.get("port", 80))
+
+    if not target:
+        abort(400)
+
+    checker = TCPPortChecker(target, port)
+
+    return jsonify(checker.check())
+
+
 @app.route('/icmp')
 @access_token_required
 def icmp_check():
diff --git a/apps/api/api/checkers/__init__.py b/apps/api/api/checkers/__init__.py
index b03b13b..bf6f8b1 100644
--- a/apps/api/api/checkers/__init__.py
+++ b/apps/api/api/checkers/__init__.py
@@ -1,2 +1,3 @@
 from .http import HttpChecker
 from .icmp import ICMPChecker
+from .tcp_port import TCPPortChecker
diff --git a/apps/api/api/checkers/tcp_port.py b/apps/api/api/checkers/tcp_port.py
index 4efc487..369ef63 100644
--- a/apps/api/api/checkers/tcp_port.py
+++ b/apps/api/api/checkers/tcp_port.py
@@ -1,11 +1,42 @@
-from core.coretypes import Response
+from core.coretypes import Response, PortResponse, ResponseStatus, ErrorPayload, ErrorCodes
 from .base import BaseChecker
+import socket
 
 
 class TCPPortChecker(BaseChecker):
 
-    def __init__(self, target: str):
+    def __init__(self, target: str, port: int):
+        self.port = port
         super().__init__(target)
 
     def check(self) -> Response:
-        pass
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        # 2 seconds timeout...
+        sock.settimeout(2)
+
+        try:
+            res = sock.connect_ex((self.target, self.port))
+        except socket.gaierror:
+            return Response(
+                status=ResponseStatus.ERROR,
+                payload=ErrorPayload(
+                    message="Invalid hostname",
+                    code=ErrorCodes.InvalidHostname
+                ),
+                node=self.node_info
+            )
+        if res == 0:
+            sock.close()
+            return Response(
+                status=ResponseStatus.OK,
+                payload=PortResponse(open=True),
+                node=self.node_info
+            )
+        sock.close()
+        return Response(
+            status=ResponseStatus.OK,
+            payload=PortResponse(open=False),
+            node=self.node_info
+        )
+
+
diff --git a/apps/core/core/coretypes.py b/apps/core/core/coretypes.py
index a8d89dd..9aabf66 100644
--- a/apps/core/core/coretypes.py
+++ b/apps/core/core/coretypes.py
@@ -14,8 +14,7 @@ class ResponseStatus(str, Enum):
 class ErrorCodes(IntEnum):
     ConnectError = 1
     ICMPHostNotAlive = 2
-    TCPPortClosed = 3
-    UDPPortClosed = 4
+    InvalidHostname = 3
 
 
 @dataclass
@@ -46,6 +45,11 @@ class APINodeInfo:
     location: str
 
 
+@dataclass
+class PortResponse(Payload):
+    open: bool
+
+
 @dataclass
 class Response:
     status: ResponseStatus
diff --git a/apps/core/pyproject.toml b/apps/core/pyproject.toml
index 8173bbe..4d44170 100644
--- a/apps/core/pyproject.toml
+++ b/apps/core/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "core"
-version = "0.6.0"
+version = "0.7.0"
 description = "Types and other core functionality"
 authors = ["kiriharu <kiriharu@yandex.ru>"]