MCP Selection Lab MCP Server

by changhuliu Your server? Claim it

answering

MCP Selection Lab is answering right now. Last checked 10 min ago. It exposes 3 tools.

Benchmark MCP tool selection with metadata-only routing, collision, abstention, and holdout checks.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 16 days of history · worst day 70%

16 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

208 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp-selection-lab --transport http https://mcp-selection-lab-production.up.railway.app/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-selection-lab": {
      "url": "https://mcp-selection-lab-production.up.railway.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcp-selection-lab]
url = "https://mcp-selection-lab-production.up.railway.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-selection-lab": {
      "url": "https://mcp-selection-lab-production.up.railway.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcp-selection-lab": {
      "url": "https://mcp-selection-lab-production.up.railway.app/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

selection

get_selection_report

Read and agent-enrich an existing public scan report by id; no new target request or model call.

selection_lab_info

Get free service capabilities, limits, privacy and connection details; does not scan a target.

scan

scan_mcp_metadata

Create a free public report of MCP tool-description routing collisions. Reads discovery metadata (initialize/tools/list) only; never calls target business tools or spends funds. Use a public HTTP(S) URL without credentials, query or fragment. Results use at most 12 tools and 24 generated cases, not a real-model evaluation. The returned report is enriched with agent_plan candidate description-only edits and a machine-readable rerun instruction. Candidate edits are not untouched-holdout proof. Reports persist and are public by link. For an existing report use get_selection_report. Set internal_test=true for owner/CI validation so it is excluded from public scans. source is a self-reported referral bucket, not identity verification.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp-selection-lab-production.up.railway.app/mcp	streamable-http	answering	185 ms	10 min ago

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MCP Selection Lab — questions

Answers built from our own checks of this server.

What can MCP Selection Lab do?

It exposes 3 tools, read directly from the server on our last check. Among them: get_selection_report, scan_mcp_metadata, selection_lab_info. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is MCP Selection Lab working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 208 ms. The bar chart above shows every period we have measured.

Is MCP Selection Lab still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect MCP Selection Lab?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does MCP Selection Lab need an API key?

No. MCP Selection Lab completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is MCP Selection Lab?

It answers our handshake in 208 ms on average, which is faster than 68% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.