A huge amount of vibe coding happens in plain ChatGPT: describe the feature, copy the code, paste it into the project. The model is a strong generator and nothing in that loop is a reviewer. The three failures that follow are predictable — an SDK call that doesn't exist, a mocked path dressed up as done, a loop that works in the chat and dies at real traffic.
The 2-minute setup
- 1. ChatGPT → Settings → Connectors → Advanced → enable Developer Mode (available on Pro, Team, Enterprise, Edu).
- 2. Back in Connectors, choose Add custom connector (or Create).
- 3. Name it Verificate, paste
https://mcp.verificate.ai/mcp, authentication: none. - 4. That's it — 25 free validations on this machine, no signup. In any chat with the connector enabled, say: “validate this function with verificate before I use it.”
What comes back
A binary verdict — approved or rejected — from 17 deterministic reality gates (mock and placeholder veto, invented-API checks, false-“done” detection) plus a frontier-model enterprise review. A real rejection from this production gateway, verbatim:
REJECTED - 30.8/100, vetoed by code_reality_gate
- "N+1 synchronous API calls ... 100 sequential HTTP roundtrips,
~10-20 seconds ... will trigger Stripe rate limiting (100 req/sec)"
- "stripe.Inventory is not a valid Stripe SDK resource"
- "Stripe API requires integer cents" (float money math)Each finding is something a senior engineer would have caught in review — and something you'd otherwise have discovered in production.
Using Claude Code, Cursor or Windsurf instead? The same server installs with one click. After the free 25, it's a 30-day trial (no card), then $30/month — the senior reviewer your ChatGPT workflow never had.