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MCP Selection Lab

R0· no sign-in

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

v0.5.2 · active · repository · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality96strong
Trust97of 100
Uptime, 30 days100%
Latency p50330 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "mcp-selection-lab": {
      "type": "http",
      "url": "https://agenttrustlab.com/mcp"
    }
  }
}
claude mcp add --transport http mcp-selection-lab https://agenttrustlab.com/mcp
[mcp_servers.mcp-selection-lab]
url = "https://agenttrustlab.com/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-selection-lab": {
      "type": "remote",
      "url": "https://agenttrustlab.com/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "mcp-selection-lab": {
      "type": "http",
      "url": "https://agenttrustlab.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=mcp-selection-lab&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYWdlbnR0cnVzdGxhYi5jb20vbWNwIn0%3D"
}
{
  "servers": {
    "mcp-selection-lab": {
      "type": "http",
      "url": "https://agenttrustlab.com/mcp"
    }
  }
}
{
  "mcpServers": {
    "mcp-selection-lab": {
      "httpUrl": "https://agenttrustlab.com/mcp"
    }
  }
}
extensions:
  "mcp-selection-lab":
    enabled: true
    name: "mcp-selection-lab"
    type: streamable_http
    uri: "https://agenttrustlab.com/mcp"
    timeout: 300

Quality 96 / 100strong

protocol88 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • warn
    protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations3 of 3 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 464 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

3 tools, about 464 tokens to load them all · tool set 8ffc54c1ad57 · checked 2026-10-20 09:31 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 97 / 100

provenance90
liveness100
freshness100
hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-100% +updated-7d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://agenttrustlab.com/mcp streamable-httpnoneyes100%330 ms2026-07-282026-10-20

Tools (3)

get_selection_reportread-onlyRead and agent-enrich an existing public scan report by id; no new target request or model call.
scan_mcp_metadataCreate 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.
selection_lab_inforead-onlyGet free service capabilities, limits, privacy and connection details; does not scan a target.

Schemas: list_tools.

Also listed as

1 other active names share this repository: io.github.ChanghuLiu/trust-live

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Official server.json
{
  "name": "io.github.ChanghuLiu/mcp-selection-lab",
  "title": "MCP Selection Lab",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://agenttrustlab.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.5.2",
  "repository": {
    "url": "https://github.com/ChanghuLiu/mcp-selection-lab",
    "source": "github"
  },
  "websiteUrl": "https://agenttrustlab.com/",
  "description": "Benchmark MCP tool selection with metadata-only routing, collision, abstention, and holdout checks."
}