diff --git a/AGENTS.md b/AGENTS.md
index 5754ffe..8394f35 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -463,7 +463,7 @@ mc.subscribe(EventType.ACK, handler)
 |----------|---------|-------------|
 | `MESHCORE_SERIAL_PORT` | auto-detect | Serial port for radio |
 | `MESHCORE_TCP_HOST` | *(none)* | TCP host for radio (mutually exclusive with serial/BLE) |
-| `MESHCORE_TCP_PORT` | `4000` | TCP port (used with `MESHCORE_TCP_HOST`) |
+| `MESHCORE_TCP_PORT` | `5000` | TCP port (used with `MESHCORE_TCP_HOST`) |
 | `MESHCORE_BLE_ADDRESS` | *(none)* | BLE device address (mutually exclusive with serial/TCP) |
 | `MESHCORE_BLE_PIN` | *(required with BLE)* | BLE PIN code |
 | `MESHCORE_SERIAL_BAUDRATE` | `115200` | Serial baud rate |
diff --git a/README.md b/README.md
index ccd51a4..97e411e 100644
--- a/README.md
+++ b/README.md
@@ -177,7 +177,7 @@ Only one transport may be active at a time. If multiple are set, the server will
 | `MESHCORE_SERIAL_PORT` | (auto-detect) | Serial port path |
 | `MESHCORE_SERIAL_BAUDRATE` | 115200 | Serial baud rate |
 | `MESHCORE_TCP_HOST` | | TCP host (mutually exclusive with serial/BLE) |
-| `MESHCORE_TCP_PORT` | 4000 | TCP port |
+| `MESHCORE_TCP_PORT` | 5000 | TCP port |
 | `MESHCORE_BLE_ADDRESS` | | BLE device address (mutually exclusive with serial/TCP) |
 | `MESHCORE_BLE_PIN` | | BLE PIN (required when BLE address is set) |
 | `MESHCORE_LOG_LEVEL` | INFO | `DEBUG`, `INFO`, `WARNING`, `ERROR` |
@@ -193,7 +193,7 @@ Common launch patterns:
 MESHCORE_SERIAL_PORT=/dev/ttyUSB0 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
 
 # TCP
-MESHCORE_TCP_HOST=192.168.1.100 MESHCORE_TCP_PORT=4000 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+MESHCORE_TCP_HOST=192.168.1.100 MESHCORE_TCP_PORT=5000 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
 
 # BLE
 MESHCORE_BLE_ADDRESS=AA:BB:CC:DD:EE:FF MESHCORE_BLE_PIN=123456 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
diff --git a/app/config.py b/app/config.py
index 6bc5e0d..36ed5a1 100644
--- a/app/config.py
+++ b/app/config.py
@@ -14,7 +14,7 @@ class Settings(BaseSettings):
     serial_port: str = ""  # Empty string triggers auto-detection
     serial_baudrate: int = 115200
     tcp_host: str = ""
-    tcp_port: int = 4000
+    tcp_port: int = 5000
     ble_address: str = ""
     ble_pin: str = ""
     log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR"] = "INFO"
diff --git a/tests/test_config.py b/tests/test_config.py
index a917cd4..a893483 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -33,7 +33,7 @@ class TestTransportExclusivity:
 
     def test_tcp_default_port(self):
         s = Settings(tcp_host="192.168.1.1")
-        assert s.tcp_port == 4000
+        assert s.tcp_port == 5000
 
     def test_ble_only(self):
         s = Settings(ble_address="AA:BB:CC:DD:EE:FF", ble_pin="123456")