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Diegoval-Dev

MCP Local Server

by Diegoval-Dev
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Python
Local

MCP Local Server

Minimal Model Context Protocol (MCP) server written in Python.

Features

  • Implements JSON-RPC stdio transport.

  • Tools:

    • sum: safely sum a list of numbers.

    • grep_lines: filter lines containing a substring.

    • sha256: compute SHA-256 hash of text.

    • json_validate: validate data against a JSON Schema.

Related MCP server: MCP Math Tools

Usage

Run locally

python main.py

Test with jq or PowerShell

echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"Test","version":"0.1"}}}' | python main.py

Example tool call

echo '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"sum","arguments":{"values":[1,2,3.5]}}}' | python main.py

Logging

Setea MCP_LOG_FILE para escribir JSONL además de stderr:

$env:MCP_LOG_FILE="D:\ruta\log.jsonl"
python .\main.py

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

No tool schema history has been recorded yet.

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