VentureOS — The Reality Check for Agent-Built Companies

An OKX.AI A2MCP service. An agent will tell you the domain is free. It didn't look. It can't look.

Ask a language model to start a company and it will do a beautiful job of the parts that are writing: the name, the positioning, the pitch, the launch tweet. Then it will hand you a domain it never checked, an LTV it computed wrong, and a cap table where it subtracted the dilutions.

On an agent marketplace, the caller is already a language model. It doesn't need help writing. It needs the two things it cannot do:

1. Look something up in a registry. A model has no eyes on RDAP. It will still tell you yourstartup.com is available, with total confidence, because that sentence is what the pattern demands.

2. Do arithmetic that compounds. Two 20% rounds do not leave founders with 60%. LTV at 0% churn is not "roughly $4,800". Runway is not cash ÷ burn the moment you plan to hire.

VentureOS does exactly those two things, and nothing else.

Tools

No LLM. No API key. Nothing to configure.

Related MCP server: idea-reality-mcp

The three things it refuses to do

It will not say "available" when it means "I couldn't check."

If RDAP is unreachable, or a TLD's registry refuses the query, the result is status: "unknown", available: null. Never true. A false available is the expensive direction of this error — it's the one that gets someone to design a logo, print cards and register a company. There is a test that cuts the network and asserts that every single check comes back unknown, that none come back free, and that the verdict says "could NOT be verified" rather than staying silent.

It will not invent an LTV when churn is zero.

Zero churn means customers never leave. The lifetime is infinite, so the lifetime value is infinite. There is no finite number to report, and a model asked for one will produce a large, confident, entirely fictional figure. unit_economics returns ltv: null and explains why.

{
  "ltv": null,
  "lifetimeMonths": null,
  "warnings": [
    "Monthly churn is 0%, which implies customers never leave and lifetime value is mathematically infinite. No real business has zero churn — LTV is reported as null rather than as a fabricated finite number."
  ]
}

It will not let compounding pass as addition.

{
  "finalFounderPct": 64,
  "naiveSubtractionAnswer": 60,
  "formulas": {
    "ownership": "ownership × (1 − dilution), applied round by round",
    "wrongButCommon": "startingPct − sum(dilutions)  ← this is the mistake"
  }
}

Both numbers come back. The mistake is shown, not just avoided — so an agent that was about to make it can see what it was about to say.

Every number carries its formula

Not decoration. A founder acting on an unexplained figure has no way to catch the moment an assumption was silently wrong, and neither does the agent relaying it. The formula is the audit trail.

{
  "ltv": 1600,
  "cacPaybackMonths": 5,
  "formulas": {
    "ltv": "(arpu × grossMargin) / monthlyChurn",
    "cacPaybackMonths": "cac / (arpu × grossMargin)"
  },
  "warnings": ["CAC payback is 19.2 months. Anything past ~12-18 months means growth must be financed rather than self-funded."]
}

The warnings array is the part a model would smooth over. The MCP instructions tell the calling agent to surface it, every time.

A bug worth admitting

The first version of runway computed 11 months where the answer was 12. It stopped counting the month in which the cash ran out.

Off-by-one is a rounding error in most code. Here it is a founder starting their fundraise a month late, on a number a service told them to trust. Fixed, with a test — and a comment explaining which direction of the error is the fatal one.

Run it

npm test        # 47 assertions, offline
npm run test:live   # hits RDAP, npm and GitHub for real
npm run dev     # http://localhost:8789/mcp

No dependencies. No build step. Node 18+.

Deploy

vercel --prod

Your MCP endpoint is https://<your-domain>/api/mcp.

Call it

curl -X POST https://<your-domain>/api/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{
        "name":"check_name","arguments":{"name":"your-startup"}}}'

Pricing

Free.

MIT.