0n3
MCP servers · CRO9 · connector · GPT action

Connect ChatGPT to CRO9

One line gives ChatGPT your CRO9 account as tools: 12 endpoints, site reports, briefs, scans, called with your own connection. No key in the prompt, a receipt for every call, revoke ChatGPT's access alone any time.

Get the line for ChatGPTConnect CRO9 first

Three steps

  1. Create a free 0n3 account and connect CRO9. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into ChatGPT. A custom connector in Developer mode, or an Action on a custom GPT from the OpenAPI spec.
  3. Ask ChatGPT: whoami. Then: "Sites in CRO9".
Custom connector (needs Developer mode)
  1. Settings → Connectors (or Apps) → Advanced → Developer mode on
  2. Create → name 0n3 · MCP server URL https://0n3.app/mcp · Authentication: OAuth
  3. Finish the sign-in with your 0n account
  4. Enable the connector in a chat and ask: "whoami"

ChatGPT connectors cannot send a static header, so 0n3 signs you in through its OAuth door (dynamic client registration is on).

The line above carries a placeholder; 0n3.app/install mints a real key named for ChatGPT and fills it in.

What ChatGPT can then do in CRO9

Site reports · Where a site stands: score by category, live traffic + forms + friction, the five gates and the bottleneck2
SitesGET /sites
Site scorePOST /site-score
Briefs · CRO9's proposed changes and the human decision on each — approval is a person's act, recorded as such5
BriefsPOST /briefs
Approve a briefPOST /recommendations/{id}/approve
Dismiss briefPOST /recommendations/{id}/dismiss
Release briefPOST /recommendations/{id}/release
Receipt briefPOST /recommendations/{id}/receipt
Scans · Scan any URL; AI-visibility score for a page1
ScanPOST /scan
Usage · This key's quota1
UsageGET /usage
More · Everything else this app exposes.3
BehaviorPOST /behavior
AnalysisGET /analysis
Ai visibilityPOST /ai-visibility

CRO9 in other AI clients

Claude Code + CRO9MCP server + skillClaude (desktop & claude.ai) + CRO9connectorCodex CLI + CRO9MCP serverGemini CLI + CRO9MCP serverCursor + CRO9MCP serverVS Code (Copilot) + CRO9MCP serverWindsurf + CRO9MCP server

ChatGPT with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints