exceptions.py•2.01 kB
# SPDX-License-Identifier: MIT
# Copyright (c) 2025 Roger Gujord
# https://github.com/gujord/OpenAPI-MCP
class MCPServerError(Exception):
"""Base exception for MCP server errors."""
def __init__(self, message: str, code: int = -32603):
super().__init__(message)
self.message = message
self.code = code
def to_json_rpc_error(self, req_id=None):
"""Convert to JSON-RPC error format."""
return {
"jsonrpc": "2.0",
"id": req_id,
"error": {
"code": self.code,
"message": self.message
}
}
class OpenAPIError(MCPServerError):
"""Raised when OpenAPI spec loading or parsing fails."""
def __init__(self, message: str):
super().__init__(f"OpenAPI Error: {message}", -32600)
class AuthenticationError(MCPServerError):
"""Raised when authentication fails."""
def __init__(self, message: str):
super().__init__(f"Authentication Error: {message}", -32401)
class ParameterError(MCPServerError):
"""Raised when parameter validation or parsing fails."""
def __init__(self, message: str):
super().__init__(f"Parameter Error: {message}", -32602)
class ToolNotFoundError(MCPServerError):
"""Raised when a requested tool is not found."""
def __init__(self, tool_name: str, suggestion: str = None):
message = f"Tool '{tool_name}' not found"
if suggestion:
message += f". Did you mean '{suggestion}'?"
super().__init__(message, -32601)
class RequestExecutionError(MCPServerError):
"""Raised when HTTP request execution fails."""
def __init__(self, message: str):
super().__init__(f"Request Execution Error: {message}", -32603)
class ConfigurationError(MCPServerError):
"""Raised when configuration is invalid or missing."""
def __init__(self, message: str):
super().__init__(f"Configuration Error: {message}", -32000)