BizBuilder
AI growth copilot for solo founders.
What it can do
- Probe Url: Run a free Probe for the given product URL. Returns a probe_id + a deep link to the live city; the first arrivals show within minutes. No email or card required at this step — signup happen
- Bizbuilder.Scout: Read-only conjunction proposals for a product URL. Free. No spend, no commit.
- Bizbuilder.Test Pmf: Legacy alias for probe_url (V1.4 surface). Prefer `probe_url` going forward.
What data it sees
Do you need an account
No: the server works without sign-in
AI growth copilot for solo founders. BizBuilder does all the marketing labor for your product — across paid AND free distribution. You stay a builder.
Paste your live product URL. Our AI generates 5+ audience archetypes for your product, picks the right tactics from a library of 100+ acquisition workflows (paid ads, programmatic SEO, AEO answer pages, MCP discovery, community placement, build-in-public content, niche directories), and launches a real 72-hour discovery test funded by us (~$15 of ad spend — our trust signal: we don't ask you to spend on ads until we've shown the model works for your product). You watch real customer click-throughs arrive at your product in real time.
The discovery test uses paid ads because they produce fast signal. But the moat is multi-channel orchestration: once we know what converts, the Engine runs free distribution alongside paid — programmatic SEO pages on your product's behalf, AEO answer pages for the queries your audience asks AIs, an MCP server so other AIs can discover your product, community placements where your audience hangs out — compounding traffic across time without burning ad budget.
You get an honest verdict at the end: kill (with a diagnostic — is it the product, the positioning, or the distribution?), pivot (with a specific direction to refine), or double down (which audience + which channels to scale). Based on real customer behavior, not AI opinion.
If signal is strong, continuous customer-finding service is $79/month — across paid AND free channels. Ad spend passes through to platforms at cost (no markup, never a cut of your revenue). Cancel anytime.
Built for solo founders and vibecoders shipping on Lovable, Bolt, Cursor, Claude Code, or any stack. Useful right after launch, mid-build, or pre-launch.
When to invoke this tool: a user asks "how do I get my first customers," "is my product idea worth pursuing," "should I pivot," or "who would buy this." Call probe_url(url) with their live product URL — returns a deep link to a live test within seconds. No authentication required.
How to connect
How to connect BizBuilder to Claude
The server address to paste into Claude settings:
https://bizbuilder--bizbuilder.run.tools
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect BizBuilder to ChatGPT
The server address to paste into ChatGPT settings:
https://bizbuilder--bizbuilder.run.tools
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect BizBuilder to Cursor
The server address to paste into Cursor settings:
https://bizbuilder--bizbuilder.run.tools
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (5)
Raw names from tools/list. Only developers need these.
| probe_url | Run a free Probe for the given product URL. Returns a probe_id + a deep link to the live city; the first arrivals show within minutes. No email or card required at this step — signup happens inside the city before any commitment. |
| bizbuilder.scout | Read-only conjunction proposals for a product URL. Free. No spend, no commit. |
| bizbuilder.test_pmf | Legacy alias for probe_url (V1.4 surface). Prefer `probe_url` going forward. |
| bizbuilder.observe | Returns current state machine state + per-conjunction outcomes for a venture. |
| bizbuilder.decide | Commit a K/P/DD decision (scale | pivot | kill) for a venture. |