moatshark
REMOTE · WWW.MOATSHARK.COM
Holdings of great value investors: 13Fs, overseas stakes a 13F misses, 5% stakes, insider buys
Available components
Last scanned (17 hours ago)
Scores higher than 60% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability72
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 673 tokens (~84/item across 8 items; 8 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Unverified: 1 category
A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 73
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://www.moatshark.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=moatshark.com | CN=YE1,O=Let's Encrypt,C=US | 21 Oct 2026 | 19 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 6849b8d1d89f5b533a9f6480e417c197f3b |
| SANs: moatshark.co.uk, moatshark.com, www.moatshark.co.uk, www.moatshark.com | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.moatshark.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| moatshark.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000 |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.moatshark.com/mcp | Verified | 200 | |
| http (plaintext) | http://www.moatshark.com/mcp | HTTPS enforced | 301 | https://www.moatshark.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
fetch Fetch one record ~56
The full record for one id from search (e.g. 'manager:berkshire-hathaway' or 'company:ko'), as text with its moatshark url.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | An id from search results |
No output schema declared.
No examples provided.
filing_forecast 13F filing forecast ~84
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.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | – | Optional manager slug, e.g. 'pershing-square' |
No output schema declared.
No examples provided.
get_company Get who owns a company ~62
Which value investors hold a company, how their holdings changed, its directors' recent share purchases and sales (Form 4), and basic SEC company facts.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | Company slug from search, usually the lower-case ticker, e.g. 'ko' |
No output schema declared.
No examples provided.
get_manager Get a value investor's holdings ~140
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Holdings to return (default 25, max 100) |
| slug | string | yes | Manager slug from search, e.g. 'berkshire-hathaway' |
No output schema declared.
No examples provided.
insider_buying Insider buying (Form 4) ~46
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
latest_filings Latest 13F filings ~50
The newest 13F filings from the managers on moatshark, with each one's biggest buys and sales.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Filings to return (default 15, max 60) |
No output schema declared.
No examples provided.
quarter_roundup Quarter round-up ~54
What the managers owned, bought and sold in one quarter (from 2013 Q1). Omit the quarter for the latest one being filed.
| Name | Type | Req | Description |
|---|---|---|---|
| quarter | string | – | e.g. '2026-q2' |
No output schema declared.
No examples provided.
search Search managers and companies ~70
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.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | Name, person or ticker, e.g. 'Buffett', 'Fundsmith', 'KO' |
No output schema declared.
No examples provided.
How do I install the moatshark MCP server?
moatshark is a hosted endpoint at https://www.moatshark.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · www.moatshark.com
claude mcp add --transport http sharkey1982-moatshark 'https://www.moatshark.com/mcp'
What is the moatshark MCP server?
moatshark is an MCP server listed in the public MCP registry as io.github.sharkey1982/moatshark. Holdings of great value investors: 13Fs, overseas stakes a 13F misses, 5% stakes, insider buys. This page covers its hosted endpoint (https://www.moatshark.com/mcp).
Is the moatshark MCP server safe to use?
moatshark scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the moatshark MCP server expose?
moatshark exposes 8 tools: search, get_manager, get_company, latest_filings, quarter_roundup, and 3 more. Their descriptions and schemas cost roughly 562 tokens of context every time the server is loaded.
Does the moatshark MCP server require authentication?
No. We connected to moatshark without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the moatshark MCP server still maintained?
moatshark is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.