MAINTAINERS.md

MCP Maintainers

This document lists current maintainers and working groups in the Model Context Protocol project.

Last updated: July 23, 2025

Lead Maintainers

• Justin Spahr-Summers
• David Soria Parra

Core Maintainers

• Inna Harper
• Basil Hosmer
• Paul Carleton
• Nick Cooper
• Nick Aldridge
• Che Liu
• Den Delimarsky

SDK Maintainers

Java SDK

• Christian Tzolov
• Dariusz Jędrzejczyk

Ruby SDK

• Topher Bullock
• Koichi Ito
• Ateş Göral

Swift SDK

• Matt Zmuda
• Carl Peaslee

Go SDK

• Rob Findley

C# SDK

• Stephan Halter
• Mike Kistler

Kotlin SDK

• Leonid Stashevsky
• Sergey Ignatov

Python SDK

• Inna Harper
• Jerome Swannack
• Samuel Colvin
• Marcelo Trylesinski

TypeScript SDK

• Inna Harper
• Felix Weinberger
• Olivier Chafik

Rust SDK

• Alex Hancock

Project Maintainers

• Glen Maddern (use-mcp)
• Ola Hungerford (Inspector, Reference Servers)
• Cliff Hall (Inspector, Reference Servers)
• Toby Padilla (Registry)
• Tadas Antanavicius (Registry, Reference Servers)
• Shaun Smith (Reference Servers)
• Jonathan Hefner (Reference Servers)

Community Moderators

• Ola Hungerford
• Cliff Hall
• Shaun Smith
• Jonathan Hefner
• Tadas Antanavicius

Working Groups

Security Working Group

• Den Delimarsky
• Paul Carleton
• Jenn Newton

Authorization Working Group

• Aaron Parecki
• Darin McAdams
• Paul Carleton

Client Implementor Working Group

• Michael Feldstein
• Harald Kirschner
• Connor Peet

About This Document

This document is updated by the MCP maintainers and reflects the current governance structure. For more information about MCP governance, see our governance documentation.