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Directory / US Business Verification (KYB) MCP Server
US Business Verification (KYB) MCP Server
by business-verification-mcp.sigrunner.workers.dev · https://business-verification-mcp.sigrunner.workers.dev/mcp
Keyless KYB: verify US businesses vs NY/CO/CT official registries + OFAC SDN screen. No API key.
Partial: 8 of 11 checks · 11 Nov 2026
At a glance
- Runs where
- On their server. What you send to it goes to them.
- What you need
- Nothing: it answered without a login
- Tools
- 4 tools
- Its own safety labels
- 0 read-only, 4 with no label
- Memory it takes
- About 910 tokens of your AI's memory, just for its tool descriptions
Tokens are an estimate: the characters in its tool names, descriptions and inputs, divided by 4. The exact number depends on your AI model. Safety labels are what the server says about itself. From our latest test, 11 Nov 2026.
Is US Business Verification (KYB) MCP Server server safe?
- None of the hidden-instruction wordings we know were found in its 4 tool descriptions.
- 0 of its 4 tools are labeled read-only; the others may change or send things.
- Overall it scored 87/100 on 11 Nov 2026.
A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.
What this test does not check
- Its source code and packages.
- What a tool quietly does behind the scenes, such as writing a file or calling another service.
- Instructions hidden inside live tool answers. We only look for those in tool descriptions.
- Hidden instructions worded in a way our list doesn't know yet.
- Tools that could change something. Those are read, never run.
What QAmcp can and can't see · How to tell if an MCP server is safe · Hidden instructions · Prompt injection
Known security advisories
None found in GitHub Security Advisories on 11 Nov 2026.
That means none were published there, not that there are no problems. QAmcp tests how a server behaves. It does not scan source code.
What it can do
4 tools, in the server's own words.
verify_businessKYB / know-your-business verification.
screen_sanctionsOFAC SDN sanctions screening / watchlist screen per name.
list_statesList the US states currently verifiable through this server (keyless, public-domain official registries) and how each is addressed.
get_hosted_accessDescribe the hosted batch verification rail beyond this free server: the same core run managed at high volume with per-match metered billing (pay-per-event, US…
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Tools are labeled safe or dangerousnote
1 warning
- !4 of 4 tools have no safety label (read-only or dangerous): verify_business, screen_sanctions, list_states, get_hosted_access
- !Follows MCP best practices (not scored yet)note
2 tips (not scored)
- !4 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): verify_business, screen_sanctions, list_states, get_hosted_access
- !4 tools don't say whether they reach outside services like the web (openWorldHint): verify_business, screen_sanctions, list_states, get_hosted_access
- ✓ConnectsConnected in 195 mspass
- ✓Lists its toolsFound 4 toolspass
- ✓Every tool is describedAll 4 tools and their inputs are describedpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Fast enoughpass
All good
- ✓Connecting took 195 ms
- ✓Listing tools took 25 ms
- –Tools work with good inputsnot tested
Not tested
- –verify_business: Not run: no safety label (if you own this server, test again in owner mode)
- –screen_sanctions: Not run: no safety label (if you own this server, test again in owner mode)
- –list_states: Not run: no safety label (if you own this server, test again in owner mode)
- –get_hosted_access: Not run: no safety label (if you own this server, test again in owner mode)
- –Bad inputs give a clean errorNot testednot tested
- –Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)not tested
- –No secrets leakedNo error messages to checknot tested
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://business-verification-mcp.sigrunner.workers.dev/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/ai-greyridgesignals-business-verification-mcp.html)Score over time
- 11 Nov 202687
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use US Business Verification (KYB) MCP Server, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. Free for 1 server, no card.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works