OpenSOSData – US Business Entity Search MCP Server

by opensosdata Your server? Claim it

answering

OpenSOSData – US Business Entity Search is answering right now. Last checked 10 min ago. Last commit 27 Oct 2026.

Search US business entity records across all 53 jurisdictions in real time

Uptime history 13 days of history

13 days agonow

100.0%

Uptime 24h

91 of 91 checks

—

Tools

hidden behind auth

437 ms

Response time

average over 24h

Stars

last commit 27 Oct 2026

What the code does

We read the source, 6 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Page executes code built at runtime public/index.html:271

    document.getElementById('theme-icon').innerHTML = isDark ? '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><l…

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp-server --transport http https://mcp.opensosdata.com/mcp

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

https://mcp.opensosdata.com/mcp

~/.codex/config.toml

[mcp_servers.mcp-server]
url = "https://mcp.opensosdata.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "url": "https://mcp.opensosdata.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp-server": {
      "type": "http",
      "url": "https://mcp.opensosdata.com/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.opensosdata.com/mcp	streamable-http	sign-in	399 ms	10 min ago

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OpenSOSData – US Business Entity Search — questions

Answers built from our own checks of this server.

Why is there no tool list for OpenSOSData – US Business Entity Search?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.

Is OpenSOSData – US Business Entity Search 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 437 ms. The bar chart above shows every period we have measured.

How do I connect OpenSOSData – US Business Entity Search?

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. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.

How do you sign in to OpenSOSData – US Business Entity Search?

No API key is involved. OpenSOSData – US Business Entity Search answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.

How fast is OpenSOSData – US Business Entity Search?

It answers our handshake in 437 ms on average, which is faster than 29% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is OpenSOSData – US Business Entity Search open source?

We cannot say either way: written in TypeScript and 6 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.