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Numbercheck MCP Server

answering

Numbercheck is answering right now. Last checked 2 min ago. It exposes 1 tools.

Checks $TICKER numeric claims in financial writing against SEC EDGAR XBRL data from the latest 10-K.

Uptime history 45 hours of history · worst hour 0%
45 hours agonow
34.8%
Uptime 24h
32 of 92 checks
1
Tools
read from the server
787 ms
Response time
average over 24h
open, no key
Access
streamable-http

Numbercheck does not always answer

Over the last week it answered 49.7% 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 2 min ago.

run in your terminal
claude mcp add numbercheck --transport http https://www.edgethirteen.com/api/mcp/numbercheck
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "numbercheck": {
      "url": "https://www.edgethirteen.com/api/mcp/numbercheck"
    }
  }
}
~/.codex/config.toml
[mcp_servers.numbercheck]
url = "https://www.edgethirteen.com/api/mcp/numbercheck"
.cursor/mcp.json
{
  "mcpServers": {
    "numbercheck": {
      "url": "https://www.edgethirteen.com/api/mcp/numbercheck"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "numbercheck": {
      "url": "https://www.edgethirteen.com/api/mcp/numbercheck"
    }
  }
}

Available tools 1

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

financial
check_financial_numbers
Check $CASHTAG-style ticker mentions (e.g. $AAPL) in a piece of financial writing against SEC EDGAR's own XBRL company-facts data for that company's most recent 10-K -- EPS, book value per share, revenue, market cap, total assets, total liabilities. Flags numeric claims that don't match the filed figures.

Endpoints

URLTransportStateLatencyChecked
https://www.edgethirteen.com/api/mcp/numbercheck streamable-http answering 560 ms 2 min ago

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Numbercheck — questions

Answers built from our own checks of this server.

What can Numbercheck do?
It exposes 1 tools, read directly from the server on our last check. Among them: check_financial_numbers. 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 Numbercheck working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 32 of 92 checks got a reply (34.8%), average response time 787 ms. The bar chart above shows every period we have measured.
How do I connect Numbercheck?
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 Numbercheck need an API key?
No. Numbercheck completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Numbercheck?
It answers our handshake in 787 ms on average, which is faster than 14% 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.