Counterparty Check MCP Server

by chtwebllc Your server? Claim it

answering

Counterparty Check is answering right now. Last checked 14 min ago. It exposes 4 tools.

Check a payee before your agent pays: sanctions, lookalike domains, payment details, invoice fraud.

Uptime history 11 days of history

11 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

280 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 17 October 2026. No other catalogue keeps this.

17 Oct a tool description was rewritten screen_sanctions

Nothing serious here today

Today is the operative word: we check Counterparty Check 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 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add counterparty-check --transport http https://counterpartycheck.com/mcp

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

https://counterpartycheck.com/mcp

~/.codex/config.toml

[mcp_servers.counterparty-check]
url = "https://counterpartycheck.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "counterparty-check": {
      "url": "https://counterpartycheck.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "counterparty-check": {
      "type": "http",
      "url": "https://counterpartycheck.com/mcp"
    }
  }
}

Available tools 4

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

balance

check_balance

Show the remaining prepaid balance on the API key used for this connection. Free.

counterparty

check_counterparty

Run a full pre-payment risk check on a payee: OFAC sanctions (names and wallets), domain age and email authentication, lookalike domains (vendor impersonation, brand typo-squats, executive impersonation), routing/IBAN/SWIFT/wallet validation, and business-email-compromise signals. Returns verdict proceed/review/block, a 0-100 risk score, explained findings, and a signed receipt. Costs $0.25 from the API key balance. Fill in "context" with everything you know about how the payment request arrived; it materially improves fraud detection.

screen

screen_sanctions

Screen a payee name (and optional crypto wallet) against OFAC sanctions lists and embargoed jurisdictions. Faster and cheaper than check_counterparty but does not detect fraud patterns. Costs $0.05 from the API key balance; without a key, the first 3 screens each day are free.

verify

verify_receipt

Confirm that a receipt returned by a previous check is authentic and unaltered. Free.

Endpoints

URL	Transport	State	Latency	Checked
https://counterpartycheck.com/mcp	streamable-http	answering	274 ms	14 min ago

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Counterparty Check — questions

Answers built from our own checks of this server.

What can Counterparty Check do?

It exposes 4 tools, read directly from the server on our last check. Among them: check_balance, check_counterparty, screen_sanctions, verify_receipt. 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 Counterparty Check working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 280 ms. The bar chart above shows every period we have measured.

How do I connect Counterparty Check?

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 Counterparty Check need an API key?

No. Counterparty Check completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Counterparty Check?

It answers our handshake in 280 ms on average, which is faster than 59% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.