MCP Starter Server
The MCP Starter Server is a minimal template for building AI assistant tools using the ModelContextProtocol. With this server, you can:
Use a 'hello world' example tool: The server includes a
hello_toolthat takes anameparameter and returns a greetingDevelop custom tools: Define new tools by adding their schemas and implementations in
index.tsIntegrate with Claude Desktop: Configure and use with Claude AI assistant tools
Debug and test: Use the MCP Inspector tool for development and monitoring
Publish and distribute: Easily publish as an NPM package
Enable live development: Run
npm run devto test changes in real-time
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@MCP Starter Serversay hello to John"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
MCP Starter Server
A minimal ModelContextProtocol server template for building AI assistant tools. This starter provides a basic structure for creating MCP tools that can be used with AI assistants like Claude.
Features
Simple "hello world" tool example
TypeScript + esbuild setup
Development tools preconfigured
Related MCP server: MCP Server Scaffold
Setup to build and run with Claude
Download and install Claude desktop app from claude.ai/download
Clone the repo, install dependencies and build:
npm install
npm run buildConfigure Claude to use this MCP server. If this is your first MCP server, in the root of this project run:
echo '{
"mcpServers": {
"mcp-starter": {
"command": "node",
"args": ["'$PWD'/dist/index.cjs"]
}
}
}' > ~/Library/Application\ Support/Claude/claude_desktop_config.jsonThis should result in an entry in your claude_desktop_config.json like:
"mcpServers": {
"mcp-starter": {
"command": "node",
"args": ["/Users/matt/code/mcp-starter/dist/index.cjs"]
}
}If you have existing MCP servers, add the mcp-starter block to your existing config. It's an important detail that the args is the path to <path_to_repo_on_your_machine>/mcp-starter/dist/index.cjs.
Restart Claude Desktop.
Look for the hammer icon with the number of available tools in Claude's interface to confirm the server is running.
If this is all working, you should be able to develop your MCP server using
npm run devand test it in Claude. You'll need to restart Claude each time to restart the MCP server.
Developing with Inspector
For development and debugging purposes, you can use the MCP Inspector tool. The Inspector provides a visual interface for testing and monitoring MCP server interactions.
Visit the Inspector documentation for detailed setup instructions.
To test locally with Inspector:
npm run inspectTo build on file changes run:
npm run watchOr run both the watcher and inspector:
npm run devPublishing
Once you're ready to distribute your server, it's simple!
Set up an NPM account.
Run
npm publish. This will publish a package using the project name inpackage.jsonOnce published, others can install the server with a config entry like:
"mcpServers": {
"<your-package-name>": {
"command": "npx",
"args": ["<your-package-name>"]
}
}Available Tools
The server provides:
hello_tool: A simple example tool that takes a name parameter and returns a greeting
Creating New Tools
To add new tools:
Define the tool schema in
index.tsAdd it to the tools array in the
ListToolsRequestSchemahandlerAdd the implementation in the
CallToolRequestSchemahandler
See the hello_tool implementation as an example.
Available Tools
1 toolhello_toolD
Hello tool
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | The name of the person to greet |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden for behavioral disclosure. 'Hello tool' reveals nothing about whether this performs read/write operations, requires authentication, has side effects, rate limits, or what the response format might be. It's completely inadequate for behavioral understanding.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
While technically concise with just two words, this represents under-specification rather than effective brevity. The description fails to provide any meaningful information that would help an AI agent understand or use the tool properly, making it inefficient despite its short length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with no annotations and no output schema, the description 'Hello tool' is completely inadequate. It provides no information about what the tool does, how it behaves, what it returns, or any operational context. The description fails to compensate for the lack of structured metadata.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with the single parameter 'name' clearly documented as 'The name of the person to greet'. The description adds no additional parameter information beyond what's in the schema, but with complete schema coverage, the baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description 'Hello tool' is a tautology that essentially restates the tool name without specifying what it actually does. While the name 'hello_tool' suggests a greeting function, the description fails to articulate a clear verb+resource combination or any specific purpose beyond the obvious implication from the name.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool, what context it's appropriate for, or any prerequisites. With no sibling tools mentioned, there's no need to differentiate from alternatives, but the description still offers zero usage instructions or contextual hints.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
TDQS
With only one tool, there is no possibility of ambiguity or overlap between tools, making it perfectly clear which tool to use for any task within this server's scope.
The single tool name 'hello_tool' follows a consistent verb_noun pattern, and with no other tools to compare, there is no inconsistency in naming conventions.
One tool is generally too few for a server's purpose unless it is extremely trivial, which 'hello_tool' suggests. This feels thin and under-scoped for a typical MCP server, indicating a mismatch in tool count appropriateness.
With only a 'hello_tool', the server lacks any meaningful coverage of a domain. It is severely incomplete, as there are no operations for CRUD, lifecycle management, or any substantive workflows, making it inadequate for agent-driven tasks.
Maintenance
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