What validation libraries does Simply MCP support?
Simply MCP uses the Standard Schema specification, so you can use Zod, ArkType, or Valibot (with the `@valibot/to-json-schema` peer dependency) for defining tool parameters.
Simply MCP Server
@noname9091
Basic information
About Simply MCP Server
simply a TypeScript framework for building MCP servers
Simply MCP Server config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"simply": {
"command": "npx",
"args": [
"sova",
"dev",
"src/examples/addition.ts"
]
}
}
}Simply MCP Server tools
Tool list not available yet
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Fetch the live tool list by running this server in a temporary sandbox using the button above.
Overview
What is Simply MCP?
Simply MCP is a TypeScript framework for building MCP (Model Context Protocol) servers that can handle client sessions. It provides simple tool, resource, and prompt definitions, along with built-in support for authentication, logging, error handling, and multiple transport options. The framework is designed for developers who want to quickly create MCP servers with minimal boilerplate.
How to use Simply MCP?
Install the package via npm (npm install sova), import sova from simply, create a server instance with a name and version, add tools using the addTool method with Zod (or any Standard Schema library), and start the server (e.g., server.start({ transportType: "stdio" })). Use the CLI commands npx sova dev <file> to test or npx sova inspect <file> to debug.
Key features of Simply MCP
- Simple Tool, Resource, and Prompt definition
- Authentication and session management
- Image and audio content support
- Logging and structured error handling
- SSE transport with CORS enabled by default
- Progress notifications and prompt argument auto‑completion
- Automated SSE pings and Roots support
Use cases of Simply MCP
- Exposing executable functions (tools) for LLM clients to perform actions
- Providing real-time updates via Server-Sent Events (SSE) for remote MCP communication
- Returning mixed content types (text, image, audio) from a single tool
- Building testable and debuggable MCP servers using built-in CLI tooling
Frequently asked questions
How do I run a Simply MCP server with SSE?
Call `server.start({ transportType: "sse", sse: { endpoint: "/sse", port: 8080 } })`. This starts the server listening for SSE connections on `http://localhost:8080/sse`.
Does Simply MCP support returning images and audio?
Yes. Use the `imageContent` and `audioContent` helper functions (from `sova`) to return content objects for images or audio, specifying a URL, file path, or buffer.
How can I test a Simply MCP server?
Run `npx sova dev <file>` to test with the MCP CLI, or `npx sova inspect <file>` to inspect with the MCP Inspector.
Are there any runtime dependencies for Simply MCP?
Simply MCP requires Node.js and the `sova` npm package. For Valibot, the peer dependency `@valibot/to-json-schema` is needed. No other external services are required.
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