MCP Reference Server runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 13 Nov 2026.
Reference MCP server to check, validate and test clients and SEPs. 22 tools, stdio and HTTP.
Today is the operative word: we check MCP Reference Server every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add mcp-reference-server -- npx -y mcp-reference-server
{
"mcpServers": {
"mcp-reference-server": {
"command": "npx",
"args": [
"-y",
"mcp-reference-server"
]
}
}
}
[mcp_servers.mcp-reference-server]
command = "npx"
args = ["-y", "mcp-reference-server"]
{
"mcpServers": {
"mcp-reference-server": {
"command": "npx",
"args": [
"-y",
"mcp-reference-server"
]
}
}
}
{
"servers": {
"mcp-reference-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mcp-reference-server"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
MCP_API_KEY (API key for authenticated tool calls. Issue one on /admin → API Keys. Required when AUTH_MODE=write or AUTH_MODE=all), AUTH_MODE (Authentication mode: off (default), write (write+pii tools gated), all (every tool gated)), MCP_USERS (Extra username/password users: 'alice:secret:read,write'. Comma-separated, colon-delimited), RATE_LIMIT (Max tool calls per window per caller. Default 60).
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