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Version: 1.1

websocket_communication_protocol

File: plugins/communication_protocols/websocket/src/utcp_websocket/websocket_communication_protocol.py

class WebSocketCommunicationProtocol (CommunicationProtocol)​

Documentation

WebSocket communication protocol implementation for UTCP client.

Handles real-time bidirectional communication with WebSocket-based tool providers, supporting various authentication methods and message formats. Enforces security by requiring WSS or localhost connections.

Features

  • Real-time WebSocket communication with persistent connections
  • Tool discovery via WebSocket handshake using UTCP messages
  • Flexible message formats (JSON or text-based with templates)
  • Connection pooling and automatic keep-alive
  • OAuth2 token caching and automatic refresh
  • Security validation of connection URLs

Attributes

  • _connections: Active WebSocket connections by provider key.
  • _sessions: aiohttp ClientSessions for connection management.
  • _oauth_tokens: Cache of OAuth2 tokens by client_id.

Methods:​

async register_manual(self, caller, manual_call_template: CallTemplate) -> RegisterManualResult

Register a manual and its tools via WebSocket discovery.

Expects a UtcpManual response with tools.

Args

  • caller: The UTCP client that is calling this method.
  • manual_call_template: The call template of the manual to register.

Returns

RegisterManualResult object containing the call template and manual.

async deregister_manual(self, caller, manual_call_template: CallTemplate) -> None

Deregister a manual by closing its WebSocket connection.

Args

  • caller: The UTCP client that is calling this method.
  • manual_call_template: The call template of the manual to deregister.
async call_tool(self, caller, tool_name: str, tool_args: Dict[str, Any], tool_call_template: CallTemplate) -> Any

Execute a tool call through WebSocket.

Provides Maximum Flexibility To Support Any Websocket Response Format

  • If response_format is specified, parses accordingly
  • Otherwise, returns the raw response (string or bytes)
  • No enforced response structure - works with any WebSocket endpoint

Args

  • caller: The UTCP client that is calling this method.
  • tool_name: Name of the tool to call.
  • tool_args: Dictionary of arguments to pass to the tool.
  • tool_call_template: Call template of the tool to call.

Returns

The tool's response (format depends on response_format setting).

async call_tool_streaming(self, caller, tool_name: str, tool_args: Dict[str, Any], tool_call_template: CallTemplate) -> AsyncGenerator[Any, None]

Execute a tool call through WebSocket with streaming responses.

Args

  • caller: The UTCP client that is calling this method.
  • tool_name: Name of the tool to call.
  • tool_args: Dictionary of arguments to pass to the tool.
  • tool_call_template: Call template of the tool to call.

Yields

Streaming responses from the tool.