Arcnautical MCP Server

by arcnautical Your server? Claim it

answering

Arcnautical is answering right now. Last checked 4 min ago. It exposes 7 tools. Last commit 27 Oct 2026.

Screen any vessel by IMO for sanctions, ownership opacity and vetting grade. Keyless check included.

Uptime history 52 days of history · worst day 92%

52 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

953 ms

Response time

average over 24h

Stars

last commit 27 Oct 2026

What changed 5

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 23 September 2026. No other catalogue keeps this.

27 Oct a tool description was rewritten score_voyage

27 Oct a tool changed the parameters it asks for score_voyage

10 Oct a tool description was rewritten screen_vessel

1 Oct a tool description was rewritten screen_vessel

23 Sep a tool changed version

Nothing serious here today

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

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp --transport http https://mcp.arcnautical.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.arcnautical.com/mcp

~/.codex/config.toml

[mcp_servers.mcp]
url = "https://mcp.arcnautical.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.arcnautical.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.arcnautical.com/mcp"
    }
  }
}

Available tools 7

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

screen

screen_vessel

The authenticated screening record for one vessel: every sanctions match with its source list, programme and confidence class, ownership opacity, the graded vetting factors, per-source freshness, and a retained record id. Needs ARCNAUTICAL_API_KEY. Metered: a new self-serve key includes a one-time free allowance of live screenings; get_usage reports what is left. The same vessel asked again on the same day replays the stored record free. If the result is INCOMPLETE for identity, call again with vessel_name.

screen_vessels

Batch-screen a list of IMO numbers and wait for the results (up to two minutes). Returns one verdict per hull plus the batch status. Needs ARCNAUTICAL_API_KEY. Each hull spends one screening unit unless it was already screened today.

port

find_port

Resolve a port name, country or partial UN/LOCODE to the LOCODEs the routing engine knows. Routes are addressed by LOCODE, so call this before score_voyage rather than guessing a code. Works with no API key.

score

score_voyage

Route risk between two ports (UN/LOCODEs): a 0–100 score, risk level, the signals driving it (war-risk areas, piracy, chokepoints, weather, sanctions exposure of transited EEZs), sea days, confidence and any missing sources. On lanes that can go either way round Africa it also scores the other passage (Suez or Cape) in `alternatives`. Resolve port names with find_port first. Needs ARCNAUTICAL_API_KEY; see get_usage for the allowance.

screening

get_screening

Fetch a stored screening record by id — the audit copy, retained ten years. Needs ARCNAUTICAL_API_KEY.

usage

get_usage

Live and test usage, remaining allowance, reset time, batch limits and monitor capacity for the configured key.

vessel

check_vessel

Screen one vessel by IMO number against OFAC SDN, EU, UN, UK OFSI and OpenSanctions, with an ownership-opacity score and an A–E vetting grade from port-state-control history. Works with no API key. Rate-limited to 100 requests per hour per IP. Returns the VERDICT SUMMARY only; for every sanctions match with its source list and confidence class use screen_vessel (needs a key).

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.arcnautical.com/mcp	streamable-http	answering	896 ms	4 min ago

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Entity Screen

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Pre-payment checks for AI agents: sanctions and AML screening of payees, payment pages and requests.

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Nogogo AI - French Company Reliability

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Check one French company by name or SIREN and get its Nogogo A-E reliability grade for free.

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Arcnautical — questions

Answers built from our own checks of this server.

What can Arcnautical do?

It exposes 7 tools, read directly from the server on our last check. Among them: check_vessel, find_port, get_screening, get_usage, score_voyage, screen_vessel and 1 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 Arcnautical 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 953 ms. The bar chart above shows every period we have measured.

How do I connect Arcnautical?

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 Arcnautical need an API key?

No. Arcnautical completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Arcnautical?

It answers our handshake in 953 ms on average, which is faster than 6% 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.

Is Arcnautical open source?

The code is open source: it is published under the MIT licence, written in TypeScript, 0 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at mcp.arcnautical.com, which runs on its operator's own terms.