Arcnautical MCP Server

by arcnautical Your server? Claim it

answering

Arcnautical is answering right now. Last checked 5 min ago. It exposes 7 tools. Last commit 22 Sep 2026.

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

Uptime history 4 days of history · worst day 97%

4 days agonow

96.7%

Uptime 24h

88 of 91 checks

Tools

read from the server

954 ms

Response time

average over 24h

Stars

last commit 22 Sep 2026

Arcnautical does not always answer

Over the last week it answered 98.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 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

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp": {
      "url": "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

{
  "mcpServers": {
    "mcp": {
      "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: 5,000 live screenings a month are included with a self-serve key. 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), confidence and any missing sources. Resolve port names with find_port first. Needs ARCNAUTICAL_API_KEY; 10,000 assessments a month are included with a self-serve key.

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	1098 ms	5 min ago

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7 tools answering

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 88 of 91 checks got a reply (96.7%), average response time 954 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 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 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 954 ms on average, which is faster than 11% 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?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.