E

Everything

Official
Developer Tools MCP server Source ↗
Server spec
Install
See source repository
Transport
stdio
Auth
Not publicly specified
Language
Not publicly specified
Tools exposed
5
Official
Yes

The ‘Everything’ server serves as a reference implementation and testing ground within the Model Context Protocol ecosystem. It provides standardized prompts, resources, and tool interfaces that help developers validate MCP agent behavior and experiment with protocol capabilities. As part of the official MCP organization’s server repository, it maintains alignment with the core protocol specification while offering practical examples for integration testing. Developers would primarily use this server when building or evaluating MCP-compatible agents that need to interact with multiple tool types in a controlled environment.

Tools exposed

load_prompt_templatelist_resourcesquery_tool_metadataexecute_test_sequencevalidate_mcp_message

Resources

prompt templatestest fixturesreference implementations

Requirements

  • Model Context Protocol runtime
  • Access to GitHub repository

Use cases

Testing MCP protocol implementationsDeveloping new agent capabilities against reference toolsExploring prompt engineering templatesValidating MCP message formatting

Pros & cons

Pros

  • Officially maintained reference implementation
  • Provides structured way to test MCP agents
  • Includes diverse resources for development

Cons

  • Lack of documentation in the public description
  • Unclear production readiness
  • No visible versioning or stability guarantees

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Explore the source

Everything

View repository