Backend
Claude Code Reference: MCP Servers
Claude Code MCP reference — transport types (HTTP, SSE, stdio), installation
scopes (local, project, user), .mcp.json schema, CLI commands, authentication
(OAuth, API keys, env vars), environment variable expansion, plugin-provided
MCP servers, subagent MCP scoping, managed enterprise configuration.
Background knowledge only — provides authoritative Claude Code documentation
for MCP servers. NOT a user-invoked command.