Everything (reference)

Reference test server from the MCP maintainers that exercises every protocol feature (tools, prompts, resources). Useful for checking a client, not for daily work.

💭 Memory & reasoning★ 91,226Updated 2026-10-13Auth: noneGitHub ↗

SourcesGitHubmodelcontextprotocol/servers

Test results

Last passed 2026-10-13

Claude CodePassed2026-10-13 · install, connect, tools, agent task

CursorPassed2026-10-13 · install, connect, tools, agent task

Claude DesktopNot tested—

ChatGPT (Codex)Not tested—

Protocol: 13 tools + tool call OK · 2026-10-13

Install

claude mcp add everything -- npx -y @modelcontextprotocol/server-everything

Run in your terminal. This exact command is what our harness runs in Claude Code; see the results above.

{
  "mcpServers": {
    "everything": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-everything"
      ]
    }
  }
}

Save as .cursor/mcp.json. This exact config is what our harness runs in Cursor; see the results above.

{
  "mcpServers": {
    "everything": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-everything"
      ]
    }
  }
}

Add to claude_desktop_config.json and restart Claude Desktop. Tested on the Linux beta; see the results above.

[mcp_servers.everything]
command = "npx"
args = ["-y", "@modelcontextprotocol/server-everything"]

Add to ~/.codex/config.toml (shared by the ChatGPT (Codex) CLI and the ChatGPT desktop app; Codex runs inside the ChatGPT desktop app). Tested with the ChatGPT (Codex) CLI bundled in the ChatGPT desktop app; see the results above.

Not connecting? Troubleshooting: Claude Code · Cursor · Claude Desktop · ChatGPT (Codex)

Test history

Date	Check	Result	Version
2026-10-13	Protocol (direct stdio)	Protocol: 13 tools + tool call OK	1.0.0
2026-10-13	Claude Code	Passed install, connect, tools, agent task	2.1.296 (Claude Code)
2026-10-13	Cursor	Passed install, connect, tools, agent task	2026.10.12-d47ca18

Tools seen by our harness (13)

echoget-annotated-messageget-envget-resource-linksget-resource-referenceget-structured-contentget-sumget-tiny-imagegzip-file-as-resourcetoggle-simulated-loggingtoggle-subscriber-updatestrigger-long-running-operationsimulate-research-query