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MCP Character Count

by TORIFUKUKaiou
GitHub
Python
MIT License
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mcp-charcount

Simple MCP server that provides a single tool to count characters or bytes in text.

Quick start

  • Run with stdio (no PATH to python needed):
    • uv run src/mcp_charcount/server.py
  • Develop with MCP Inspector:
    • uv run mcp dev src/mcp_charcount/server.py

Tool: count_chars

  • Args: text: str, mode: "chars"|"bytes" = "chars", include_whitespace: bool = true
  • Returns: { "count": int, "mode": str, "include_whitespace": bool }

Tests

  • pytest -q (src layout is configured; install not required)
  • With uv: uv run pytest -q

Manifest

  • mcp.json is configured for this repo layout:
    • command: uv
    • args: ["run", "src/mcp_charcount/server.py"] This matches the current server which runs mcp.run(transport='stdio') when executed as a script.

Settings Example

codex

~/.codex/config.toml

[mcp_servers.mcp-charcount] command = "uv" args = ["--directory", "/ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-charcount", "run", "src/mcp_charcount/server.py"]

Amazon Q Developer

~/.aws/amazonq/mcp.json

{ "mcpServers": { "local.mcp-charcount": { "command": "/opt/homebrew/bin/uv", "args": [ "--directory", "/ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-charcount", "run", "src/mcp_charcount/server.py" ] } } }

License: MIT

This server cannot be installed

-
security - not tested
A
license - permissive license
-
quality - not tested

How are these scores calculated?

local-only server

The server can only run on the client's local machine because it depends on local resources.

Enables counting characters or bytes in text with options to include or exclude whitespace. Provides a simple tool for text analysis and length measurement.

  1. Quick start
    1. Tool: count_chars
      1. Tests
        1. Manifest
          1. Settings Example
            1. codex
            2. Amazon Q Developer

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