Click on "Deploy 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 Server Template reverse the string 'hello world'"
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.
A minimal MCP (Model Context Protocol) server template managed with uv, exposing a string-reversal tool and basic two-integer arithmetic tools (add, subtract, multiply, divide).
uv for dependency management
TOML + Pydantic based config
reverse_string tool
add / subtract / multiply / divide tools
Centralized logging (loguru)
Custom exception handling
Standalone stdio client for manual testing
Related MCP server: DDG MCP1234
The directory structure of the project looks like this:
├── LICENSE
├── Makefile
├── README.md
├── client.py
├── main.py
├── configs
│ └── config.toml
├── outputs
├── pyproject.toml
└── src
├── __init__.py
├── app.py
├── server
│ ├── __init__.py
│ └── server.py
└── utils
├── __init__.py
├── config.py
├── exceptions.py
├── logger.py
└── models.pyuv syncuv run python main.py
# or
make runThe server communicates over stdio and is meant to be launched by an MCP client (see Step 3), not run standalone in a terminal.
uv run python client.py
# or
make clientThis spawns main.py as a subprocess over stdio, lists the available tools, then prompts you to try reverse_string and the arithmetic tools.
uv run mcp dev main.py:mcpOpens a browser UI to browse and call the registered tools interactively. main.py exposes a lazily-built mcp attribute for this purpose (see __getattr__ at the bottom of the file) — normal runs via make run / make client don't trigger it.
Add two integers
Inputs: a (required), b (required). Returns: result
Divide the first integer by the second
Inputs: a (required), b (required). Returns: result
Multiply two integers
Inputs: a (required), b (required). Returns: result
Reverse a given string
Inputs: text (required). Returns: result
Subtract the second integer from the first
Inputs: a (required), b (required). Returns: result
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
Scored across 5 tools
Each tool has a clear, distinct purpose: four basic arithmetic operations on integers and one string reversal. There is no overlap in functionality.
All tool names are verbs or verb_noun in lowercase with underscores where needed, following a consistent pattern (e.g., add, divide, reverse_string).
With 5 tools, the count is well within the ideal range (3-15) and each tool serves a distinct function.
The arithmetic operations are basic but missing common ones like modulo or power. The single string operation feels isolated and incomplete without other string utilities.
Math MCP server for primality, factorization, Java templates, and integer multiplication.