mcp-server-llmling
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LLMling Server Manual
Overview
mcp-server-llmling is a server for the Machine Chat Protocol (MCP) that provides a YAML-based configuration system for LLM applications.
[LLMLing](https://phil65.github.io/LLMling/), the backend, provides a YAML-based configuration system for LLM applications.
It allows to set up custom MCP servers serving content defined in YAML files.
- **Static Declaration**: Define your LLM's environment in YAML - no code required
- **MCP Protocol**: Built on the Machine Chat Protocol (MCP) for standardized LLM interaction
- **Component Types**: - **Resources**: Content providers (files, text, CLI output, etc.) - **Prompts**: Message templates with arguments - **Tools**: Python functions callable by the LLM
The YAML configuration creates a complete environment that provides the LLM with:
- Access to content via resources
- Structured prompts for consistent interaction
- Tools for extending capabilities
Key Features
1. Resource Management
- Load and manage different types of resources: - Text files (`PathResource`) - Raw text content (`TextResource`) - CLI command output (`CLIResource`) - Python source code (`SourceResource`) - Python callable results (`CallableResource`) - Images (`ImageResource`)
- Support for resource watching/hot-reload
- Resource processing pipelines
- URI-based resource access
2. Tool System
- Register and execute Python functions as LLM tools
- Support for OpenAPI-based tools
- Entry point-based tool discovery
- Tool validation and parameter checking
- Structured tool responses
3. Prompt Management
- Static prompts with template support
- Dynamic prompts from Python functions
- File-based prompts
- Prompt argument validation
- Completion suggestions for prompt arguments
4. Multiple Transport Options
- Stdio-based communication (default)
- Server-Sent Events (SSE) for web clients
- Support for custom transport implementations
Usage
With Zed Editor
Add LLMLing as a context server in your `settings.json`:
With Claude Desktop
Configure LLMLing in your `claude_desktop_config.json`:
Manual Server Start
Start the server directly from command line:
1. Programmatic usage
2. Using Custom Transport
3. Resource Configuration
4. Tool Configuration
Server Configuration
The server is configured through a YAML file with the following sections:
MCP Protocol
The server implements the MCP protocol which supports:
- **Resource Operations** - List available resources - Read resource content - Watch for resource changes
- **Tool Operations** - List available tools - Execute tools with parameters - Get tool schemas
- **Prompt Operations** - List available prompts - Get formatted prompts - Get completions for prompt arguments
- **Notifications** - Resource changes - Tool/prompt list updates - Progress updates - Log messages