OpenSOSData – US Business Entity Search

Name: OpenSOSData – US Business Entity Search
Author: OpenSOSData

by OpenSOSDataversion 1.0.1i★ –iRuns in the cloud

Registry nameio.github.OpenSOSData/mcp-server

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.opensosdata.com/mcp

Run this in your terminal

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

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.opensosdata.com/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account OpenSOSData, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Search & AI memoryi

More stars than 0% of the other 7221 servers in this category
Published to the registry more recently than 71% of the other 7221 servers in this category
Basic checks equal to or better than 100% of the other 7221 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is OpenSOSData – US Business Entity Search safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.1) reached the registry 15 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated 3 days ago

Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 20 days ago

Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated 44 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

OpenSOSData MCP Server

Real-time US business entity search for Claude. Search, verify, and check the status of any LLC, corporation, or registered entity across all 53 US jurisdictions directly from your Claude conversation.

The only business entity search MCP with complete US coverage: all 50 states + Washington DC + Puerto Rico + US Virgin Islands.

What You Can Do

Ask Claude things like:

"Is Stripe Inc registered as a corporation in Delaware?"
"Search for any LLC named Apex Consulting in Texas, Florida, and New York"
"Verify these 5 vendors are properly registered" (batch check)
"What states does OpenSOSData cover?"
"Check if this company is active or dissolved in California"

Connect via Claude.ai

Go to claude.ai/connectors
Find OpenSOSData
Connect with your API key from opensosdata.com

Install via Claude Desktop or Claude Code

Add to your claude_desktop_config.json:

"mcpServers": { "opensosdata": { "command": "npx", "args": ["-y", "@opensosdata/mcp-server"], "env": { "OPENSOSDATA_API_KEY": "your-api-key-here" } } } }

Get your API key at opensosdata.com. 10 free lookups included on signup. No credit card required.

Remote MCP Server (No Installation)

Connect directly without installing anything:

https://mcp.opensosdata.com/mcp

Pass your OpenSOSData API key as a Bearer token in the Authorization header.

Available Tools

Tool	Description
`search_business_entity`	Search by entity name and state. Returns name, ID, status, type, registered agent, address.
`check_entity_status`	Verify if a business is active, inactive, or dissolved. Optimized for KYB and due diligence.
`batch_search`	Search up to 10 entities simultaneously across different states.
`list_supported_jurisdictions`	Returns all 53 active jurisdictions with live coverage.
`get_jurisdictions_for_region`	Get jurisdictions by US region (northeast, southeast, midwest, southwest, west, territories).

All tools are read-only (readOnlyHint: true). No data is modified.

Usage Examples

Example 1: KYB Verification

You: "Is Stripe Inc registered as a corporation in Delaware?"

Claude: Calls check_entity_status with entity_name="Stripe" and state="DE", returns confirmation that Stripe is active and registered, with entity ID and filing details.

Example 2: Multi-State Due Diligence

You: "Search for any LLC named Apex Consulting in Texas, Florida, and New York"

Claude: Calls batch_search with three entries, returns all matching entities across all three states with their current status.

Example 3: Vendor Verification

You: "Verify these vendors are properly registered:

Acme Corp in California
Summit LLC in Georgia
Pinnacle Inc in Illinois"

Claude: Calls batch_search, returns active/inactive status for each vendor with entity IDs for your records.

Example 4: Regional Compliance Check

You: "What jurisdictions should I check for a company doing business across the Southeast?"

Claude: Calls get_jurisdictions_for_region with region="southeast", returns all Southeast states so you know exactly which registries to verify.

Example 5: Territory Coverage

You: "Does this API cover Puerto Rico and DC?"

Claude: Calls list_supported_jurisdictions, confirms coverage of all 53 jurisdictions including DC, Puerto Rico, and US Virgin Islands.

Coverage

53 US jurisdictions with live, real-time data:

All 50 US states including Kansas
Washington DC (corponline.dlcp.dc.gov)
Puerto Rico (rcp.estado.pr.gov)
US Virgin Islands (corporationsandtrademarks.vi.gov)

Data is fetched live from official Secretary of State portals at query time. Not a stale database.

Pricing

Tier	Cost
Free	10 lookups on signup
Pay-as-you-go	$0.0314 per lookup
100 lookups	$3.14

No subscription. No monthly fee. Pay only for what you use.

Create your account to get started.

Who Uses This

KYB/Compliance teams verifying business registrations
Due diligence workflows checking entity status before deals
Legal professionals confirming entity standing
Fintech and lending platforms validating business customers
Developers building business verification into their products

Documentation

Full documentation and API reference: opensosdata.com/mcp

Support

Email: support@opensosdata.com
Docs: opensosdata.com/mcp
Issues: github.com/OpenSOSData/opensosdata-mcp/issues

Privacy

Your search queries are used only to fulfill your request. No conversation data is stored beyond what is necessary to return results.

Full privacy policy: opensosdata.com/privacy

License

MIT

*OpenSOSData is not affiliated with any US government agency. Data is sourced from official public Secretary of State portals.*

OpenSOSData – US Business Entity Search

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

OpenSOSData MCP Server

What You Can Do

Connect via Claude.ai

Install via Claude Desktop or Claude Code

Remote MCP Server (No Installation)

Available Tools

Usage Examples

Example 1: KYB Verification

Example 2: Multi-State Due Diligence

Example 3: Vendor Verification

Example 4: Regional Compliance Check

Example 5: Territory Coverage

Coverage

Pricing

Who Uses This

Documentation

Support

Privacy

License