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moatshark MCP Server

by sharkey1982 Your server? Claim it
answering

moatshark is answering right now. Last checked 2 min ago. It exposes 8 tools.

Holdings of great value investors: 13Fs, overseas stakes a 13F misses, 5% stakes, insider buys

Uptime history 6 days of history
6 days agonow
100.0%
Uptime 24h
92 of 92 checks
8
Tools
read from the server
691 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check moatshark every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 moatshark --transport http https://www.moatshark.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://www.moatshark.com/mcp
~/.codex/config.toml
[mcp_servers.moatshark]
url = "https://www.moatshark.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "moatshark": {
      "url": "https://www.moatshark.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "moatshark": {
      "type": "http",
      "url": "https://www.moatshark.com/mcp"
    }
  }
}

Available tools 8

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

company
get_company
Which value investors hold a company, how their holdings changed, its directors' recent share purchases and sales (Form 4), and basic SEC company facts.
fetch
fetch
The full record for one id from search (e.g. 'manager:berkshire-hathaway' or 'company:ko'), as text with its moatshark url.
filing
filing_forecast
When the managers file their 13Fs: the deadline for the quarter being filed, who has filed so far, who is expected on each remaining day (from each manager's last eight quarters), and who is later than usual. Give a slug for one manager's habit and history.
insider
insider_buying
Open-market share purchases reported on Form 4 in the last 90 days: by the value investors themselves (as 10% owners) and by companies' own directors and officers.
latest
latest_filings
The newest 13F filings from the managers on moatshark, with each one's biggest buys and sales.
manager
get_manager
Everything moatshark has on one value investor: its latest 13F (holdings, weights, change from the previous quarter), the overseas stakes a 13F never shows (from regulators in Japan, the UK, the Netherlands, France, Germany and Spain, with estimated values), its US funds' non-US holdings (N-PORT), 5% stake filings, Form 4 purchases since the 13F, and when it usually files.
quarter
quarter_roundup
What the managers owned, bought and sold in one quarter (from 2013 Q1). Omit the quarter for the latest one being filed.
search
search
Find value investors (managers) and companies on moatshark by name, person or ticker. Returns slugs for get_manager and get_company, and results with ids for fetch.

Endpoints

URLTransportStateLatencyChecked
https://www.moatshark.com/mcp streamable-http answering 966 ms 2 min ago

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moatshark — questions

Answers built from our own checks of this server.

What can moatshark do?
It exposes 8 tools, read directly from the server on our last check. Among them: fetch, filing_forecast, get_company, get_manager, insider_buying, latest_filings and 2 more. 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 moatshark working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 691 ms. The bar chart above shows every period we have measured.
How do I connect moatshark?
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 moatshark need an API key?
No. moatshark completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is moatshark?
It answers our handshake in 691 ms on average, which is faster than 13% 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.