EX MCP Server

"""Custom API provider implementation.""" import logging import os from typing import Optional from .base import ( ModelCapabilities, ModelResponse, ProviderType, RangeTemperatureConstraint, ) from .openai_compatible import OpenAICompatibleProvider from .openrouter_registry import OpenRouterModelRegistry class CustomProvider(OpenAICompatibleProvider): """Custom API provider for local models. Supports local inference servers like Ollama, vLLM, LM Studio, and any OpenAI-compatible API endpoint. """ FRIENDLY_NAME = "Custom API" # Model registry for managing configurations and aliases (shared with OpenRouter) _registry: Optional[OpenRouterModelRegistry] = None def __init__(self, api_key: str = "", base_url: str = "", **kwargs): """Initialize Custom provider for local/self-hosted models. This provider supports any OpenAI-compatible API endpoint including: - Ollama (typically no API key required) - vLLM (may require API key) - LM Studio (may require API key) - Text Generation WebUI (may require API key) - Enterprise/self-hosted APIs (typically require API key) Args: api_key: API key for the custom endpoint. Can be empty string for providers that don't require authentication (like Ollama). Falls back to CUSTOM_API_KEY environment variable if not provided. base_url: Base URL for the custom API endpoint (e.g., 'http://localhost:11434/v1'). Falls back to CUSTOM_API_URL environment variable if not provided. **kwargs: Additional configuration passed to parent OpenAI-compatible provider Raises: ValueError: If no base_url is provided via parameter or environment variable """ # Fall back to environment variables only if not provided if not base_url: base_url = os.getenv("CUSTOM_API_URL", "") if not api_key: api_key = os.getenv("CUSTOM_API_KEY", "") if not base_url: raise ValueError( "Custom API URL must be provided via base_url parameter or CUSTOM_API_URL environment variable" ) # For Ollama and other providers that don't require authentication, # set a dummy API key to avoid OpenAI client header issues if not api_key: api_key = "dummy-key-for-unauthenticated-endpoint" logging.debug("Using dummy API key for unauthenticated custom endpoint") logging.info(f"Initializing Custom provider with endpoint: {base_url}") super().__init__(api_key, base_url=base_url, **kwargs) # Initialize model registry (shared with OpenRouter for consistent aliases) if CustomProvider._registry is None: CustomProvider._registry = OpenRouterModelRegistry() # Log loaded models and aliases only on first load models = self._registry.list_models() aliases = self._registry.list_aliases() logging.info(f"Custom provider loaded {len(models)} models with {len(aliases)} aliases") def _resolve_model_name(self, model_name: str) -> str: """Resolve model aliases to actual model names. For Ollama-style models, strips version tags (e.g., 'llama3.2:latest' -> 'llama3.2') since the base model name is what's typically used in API calls. Args: model_name: Input model name or alias Returns: Resolved model name with version tags stripped if applicable """ # First, try to resolve through registry as-is config = self._registry.resolve(model_name) if config: if config.model_name != model_name: logging.info(f"Resolved model alias '{model_name}' to '{config.model_name}'") return config.model_name else: # If not found in registry, handle version tags for local models # Strip version tags (anything after ':') for Ollama-style models if ":" in model_name: base_model = model_name.split(":")[0] logging.debug(f"Stripped version tag from '{model_name}' -> '{base_model}'") # Try to resolve the base model through registry base_config = self._registry.resolve(base_model) if base_config: logging.info(f"Resolved base model '{base_model}' to '{base_config.model_name}'") return base_config.model_name else: return base_model else: # If not found in registry and no version tag, return as-is logging.debug(f"Model '{model_name}' not found in registry, using as-is") return model_name def get_capabilities(self, model_name: str) -> ModelCapabilities: """Get capabilities for a custom model. Args: model_name: Name of the model (or alias) Returns: ModelCapabilities from registry or generic defaults """ # Try to get from registry first capabilities = self._registry.get_capabilities(model_name) if capabilities: # Check if this is an OpenRouter model and apply restrictions config = self._registry.resolve(model_name) if config and not config.is_custom: # This is an OpenRouter model, check restrictions from utils.model_restrictions import get_restriction_service restriction_service = get_restriction_service() if not restriction_service.is_allowed(ProviderType.OPENROUTER, config.model_name, model_name): raise ValueError(f"OpenRouter model '{model_name}' is not allowed by restriction policy.") # Update provider type to OPENROUTER for OpenRouter models capabilities.provider = ProviderType.OPENROUTER else: # Update provider type to CUSTOM for local custom models capabilities.provider = ProviderType.CUSTOM return capabilities else: # Resolve any potential aliases and create generic capabilities resolved_name = self._resolve_model_name(model_name) logging.debug( f"Using generic capabilities for '{resolved_name}' via Custom API. " "Consider adding to custom_models.json for specific capabilities." ) # Create generic capabilities with conservative defaults capabilities = ModelCapabilities( provider=ProviderType.CUSTOM, model_name=resolved_name, friendly_name=f"{self.FRIENDLY_NAME} ({resolved_name})", context_window=32_768, # Conservative default max_output_tokens=32_768, # Conservative default max output supports_extended_thinking=False, # Most custom models don't support this supports_system_prompts=True, supports_streaming=True, supports_function_calling=False, # Conservative default supports_temperature=True, # Most custom models accept temperature parameter temperature_constraint=RangeTemperatureConstraint(0.0, 2.0, 0.7), ) # Mark as generic for validation purposes capabilities._is_generic = True return capabilities def get_provider_type(self) -> ProviderType: """Get the provider type.""" return ProviderType.CUSTOM def validate_model_name(self, model_name: str) -> bool: """Validate if the model name is allowed. For custom endpoints, only accept models that are explicitly intended for local/custom usage. This provider should NOT handle OpenRouter or cloud models. Args: model_name: Model name to validate Returns: True if model is intended for custom/local endpoint """ # logging.debug(f"Custom provider validating model: '{model_name}'") # Try to resolve through registry first config = self._registry.resolve(model_name) if config: model_id = config.model_name # Use explicit is_custom flag for clean validation if config.is_custom: logging.debug(f"... [Custom] Model '{model_name}' -> '{model_id}' validated via registry") return True else: # This is a cloud/OpenRouter model - CustomProvider should NOT handle these # Let OpenRouter provider handle them instead # logging.debug(f"... [Custom] Model '{model_name}' -> '{model_id}' not custom (defer to OpenRouter)") return False # Handle version tags for unknown models (e.g., "my-model:latest") clean_model_name = model_name if ":" in model_name: clean_model_name = model_name.split(":")[0] logging.debug(f"Stripped version tag from '{model_name}' -> '{clean_model_name}'") # Try to resolve the clean name config = self._registry.resolve(clean_model_name) if config: return self.validate_model_name(clean_model_name) # Recursively validate clean name # For unknown models (not in registry), only accept if they look like local models # This maintains backward compatibility for custom models not yet in the registry # Accept models with explicit local indicators in the name if any(indicator in clean_model_name.lower() for indicator in ["local", "ollama", "vllm", "lmstudio"]): logging.debug(f"Model '{clean_model_name}' validated via local indicators") return True # Accept simple model names without vendor prefix (likely local/custom models) if "/" not in clean_model_name: logging.debug(f"Model '{clean_model_name}' validated as potential local model (no vendor prefix)") return True # Reject everything else (likely cloud models not in registry) logging.debug(f"Model '{model_name}' rejected by custom provider (appears to be cloud model)") return False def generate_content( self, prompt: str, model_name: str, system_prompt: Optional[str] = None, temperature: float = 0.3, max_output_tokens: Optional[int] = None, **kwargs, ) -> ModelResponse: """Generate content using the custom API. Args: prompt: User prompt to send to the model model_name: Name of the model to use system_prompt: Optional system prompt for model behavior temperature: Sampling temperature max_output_tokens: Maximum tokens to generate **kwargs: Additional provider-specific parameters Returns: ModelResponse with generated content and metadata """ # Resolve model alias to actual model name resolved_model = self._resolve_model_name(model_name) # Call parent method with resolved model name return super().generate_content( prompt=prompt, model_name=resolved_model, system_prompt=system_prompt, temperature=temperature, max_output_tokens=max_output_tokens, **kwargs, ) def supports_thinking_mode(self, model_name: str) -> bool: """Check if the model supports extended thinking mode. Args: model_name: Model to check Returns: True if model supports thinking mode, False otherwise """ # Check if model is in registry config = self._registry.resolve(model_name) if self._registry else None if config and config.is_custom: # Trust the config from custom_models.json return config.supports_extended_thinking # Default to False for unknown models return False def get_model_configurations(self) -> dict[str, ModelCapabilities]: """Get model configurations from the registry. For CustomProvider, we convert registry configurations to ModelCapabilities objects. Returns: Dictionary mapping model names to their ModelCapabilities objects """ configs = {} if self._registry: # Get all models from registry for model_name in self._registry.list_models(): # Only include custom models that this provider validates if self.validate_model_name(model_name): config = self._registry.resolve(model_name) if config and config.is_custom: # Use ModelCapabilities directly from registry configs[model_name] = config return configs def get_all_model_aliases(self) -> dict[str, list[str]]: """Get all model aliases from the registry. Returns: Dictionary mapping model names to their list of aliases """ # Since aliases are now included in the configurations, # we can use the base class implementation return super().get_all_model_aliases()