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Cairn MCP Server

by cairnsafe Your server? Claim it
not responding

Cairn is listed as active in the registry but did not answer our last check. It exposes 3 tools.

Workplace safety citation counts, penalties and 29 CFR standards data for AI assistants

Uptime history 25 days of history · worst day 0%
25 days agonow
8.8%
Uptime 24h
8 of 91 checks
3
Tools
read from the server
487 ms
Response time
average over 24h
open, no key
Access
streamable-http

Cairn does not always answer

Over the last week it answered 16.6% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add cairn --transport http https://cairnsafe.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://cairnsafe.com/mcp
~/.codex/config.toml
[mcp_servers.cairn]
url = "https://cairnsafe.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "cairn": {
      "url": "https://cairnsafe.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cairn": {
      "type": "http",
      "url": "https://cairnsafe.com/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.

standard
get_standard
Headline enforcement figures for one 29 CFR section, such as 1910.147 or 1926.501: citations and inspections since 2016, total penalties, the median penalty per violation, its rank, and how many interpretation letters cite it, with links.
standards
search_standards
Find workplace safety standards (29 CFR sections) by section number or by words in the title, such as "1910.14", "lockout", "fall protection" or "forklift". Returns up to 10 standards cited at least 50 times since 2016, most cited first, with headline figures and a link.
top
top_cited_standards
The 10 most-cited 29 CFR safety standards since 2016, for all standards or one CFR part: 1910 general industry, 1926 construction, 1904 recordkeeping, 1915 shipyards, 1917 marine terminals, 1918 longshoring, 1928 agriculture.

Endpoints

URLTransportStateLatencyChecked
https://cairnsafe.com/mcp streamable-http answering 100 ms 11 min ago

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Cairn — questions

Answers built from our own checks of this server.

What can Cairn do?
It exposes 3 tools, read directly from the server on our last check. Among them: get_standard, search_standards, top_cited_standards. 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 Cairn working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 8 of 91 checks got a reply (8.8%), average response time 487 ms. The bar chart above shows every period we have measured.
The registry lists Cairn as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Cairn?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Cairn need an API key?
No. Cairn 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 Cairn?
It answers our handshake in 487 ms on average, which is faster than 24% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.