subagent

mcp-protocol-specialist — Claude Code subagent for MCP specs

Q: How do I install mcp-protocol-specialist in Claude?

Run `npx claude-code-templates@latest --agent mcp-dev-team/mcp-protocol-specialist`, then confirm the file landed at `.claude/agents/mcp-protocol-specialist.md`.

Q: Which tools does the subagent have?

Only `Read`, `Write`, `Edit` and `WebSearch`. Running code or tests is not part of its toolset.

A subagent for Model Context Protocol work: transports, JSON-RPC 2.0, versioning and compliance across implementations.

Install into Claude Code · claude-code-templates All methods and platforms ↓

npx claude-code-templates@latest --agent mcp-dev-team/mcp-protocol-specialist

Open on GitHub

What mcp-protocol-specialist does

This subagent knows the Model Context Protocol specification: how transports are built, how capabilities and versions get negotiated, how schemas are validated. Its toolset is narrow — Read, Write, Edit and WebSearch — so it will not run your code or your test suite.

Reach for it when you are building an MCP server or client and hit a transport mismatch. It works specification-first, suggests backward-compatibility and migration paths between versions, and produces spec documents and RFCs, transport implementation guides, schema validation frameworks, compliance test suites and migration guides.

One catch: without other tools it only sees what you put in files or what WebSearch turns up. If you need a live code walkthrough with execution, look elsewhere.

What it helps with

design a transport for a new MCP server
align protocol versions between client and server
check a schema against the specification
write a migration guide for a new MCP version
document edge case behaviour in an RFC

Example prompts for the agent

Help me design a Streamable HTTP transport for my MCP server
Check my tool schema against the MCP specification
Write a migration guide between protocol versions

How to install mcp-protocol-specialist

1claude-code-templates

npx claude-code-templates@latest --agent mcp-dev-team/mcp-protocol-specialist

2Manually: put the files in place

.claude/agents/mcp-protocol-specialist.md

For all projects use ~/.claude/agents/. Claude delegates by the description field or an @-mention

Manually: put the files in place

.codex/agents/mcp-protocol-specialist.toml

Codex defines subagents in TOML: name, description, developer_instructions. Move the Markdown text into developer_instructions by hand. For all projects use ~/.codex/agents/

Manually: put the files in place

.cursor/agents/mcp-protocol-specialist.md

Cursor also reads .claude/agents/

Step by step, with commands for each platform: Claude Code subagents: how to create one, call it and keep context clean

Questions about mcp-protocol-specialist

How do I install mcp-protocol-specialist in Claude?

Run npx claude-code-templates@latest --agent mcp-dev-team/mcp-protocol-specialist, then confirm the file landed at .claude/agents/mcp-protocol-specialist.md.

What does mcp-protocol-specialist do?

It helps with MCP specification work: transports, JSON-RPC 2.0, capability negotiation, schema validation and compliance testing.

Which tools does the subagent have?

Only Read, Write, Edit and WebSearch. Running code or tests is not part of its toolset.

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