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Registry Lag — how fast MCP directories reflect a new server

by registry-lag.rowb.app · remote · no sign-in to list tools · v1.0.0 · published by app.rowb.registry-lag

Checks whether an MCP server is listed in MCP directories right now, and how long the listing took.

Changes · 1
CompareRegistry entry

2 tools: 1 change things and 1 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http reflection https://registry-lag.rowb.app/mcp --header 'Authorization: <your-authorization>'

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Changes things 1Claude Code: ask
  • check_directory_lagCheck whether an MCP server name is listed in public MCP directories right now, and how long until it appeared (reflection lag).No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Check whether an MCP server name is listed in public MCP directories right now, and how long until it appeared (reflection lag).
Only reads 1Claude Code: allow
  • get_reportNames checked so far with run counts and first/last seen timestamps.No findings

    Why it is in this group

    • The name "get_report" says "get": a word for reading.
    Description, as the server wrote it
    Names checked so far with run counts and first/last seen timestamps.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http reflection https://registry-lag.rowb.app/mcp --header 'Authorization: <your-authorization>'

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__reflection__get_report"
    ],
    "ask": [
      "mcp__reflection__check_directory_lag"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as reflection. Review it before you use it.