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MCP server · Code & DevOps

moatshark

By sharkey1982

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

Source code
Connect to moatshark
Checks passed
12 / 22

2 failed · 8 not measured

Median response
382 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
8

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
222

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 382 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name moatshark.

  • Pass
    Lists tools

    tools/list returned 8 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 382 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 382 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    8 of 8 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Not measured
    Website matches publisher

    This namespace is not a reverse domain, so the website comparison does not apply.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Fail
    Repo owner matches

    The GitHub repository owner does not match the namespace login.

  • Pass
    Recently updated

    Updated 2026-11-04T11:34:37.892987Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using moatshark

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http moatshark https://www.moatshark.com/mcp

Capabilities

Tools 8

fetch

The full record for one id from search (e.g. 'manager:berkshire-hathaway' or 'company:ko'), as text with its moatshark url.

Discovered
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.

Discovered
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.

Discovered
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.

Discovered
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.

Discovered
latest_filings

The newest 13F filings from the managers on moatshark, with each one's biggest buys and sales.

Discovered
quarter_roundup

What the managers owned, bought and sold in one quarter (from 2013 Q1). Omit the quarter for the latest one being filed.

Discovered
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.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected382 ms8

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