What it does
Echo-server is a minimal MCP server template that demonstrates message echoing within the MCP protocol. It serves primarily as a learning resource and entry point for building custom MCP servers rather than as a production service. The server receives text input and reflects it back unchanged, illustrating the basic request-response communication pattern between clients and MCP servers. The template is designed to be simple enough to understand quickly, making it useful for developers new to the MCP specification.
Who it's for
Developers learning the MCP specification or building their first custom MCP server. If you need a reference implementation to understand server structure or want a minimal template to extend for your own purposes, this provides a working example without unnecessary complexity.
Common use cases
- Learning MCP server architecture and protocol fundamentals
- Using as a template scaffold when creating a new MCP server
- Testing or prototyping MCP client implementations with a predictable, simple server
- Reference for understanding basic message-handling and request-response patterns
Setup pitfalls
- Intentionally minimal—you will need to extend it with features for any real use case
- No error handling, logging, or configuration beyond basic echoing
- Lacks common production infrastructure like state management, retries, or authentication
- Best used as a template to build from, not as a ready-to-run service