{"ok":true,"name":"cooper_upgrade_link","description":"Use this when the human wants to upgrade, or a limit was hit and they agree to pay. Requires auth. Creates a Stripe Checkout session; no charge happens until the human completes checkout in their browser. Inputs: plan (required; starter or pro), email (optional receipt email), client_id (optional idempotency key). Returns {url, session_id, plan}: give the url to the human; never open or complete it yourself.","inputSchema":{"type":"object","required":["plan"],"properties":{"plan":{"enum":["starter","pro"],"type":"string","description":"Paid plan to check out"},"email":{"type":"string","description":"Optional receipt email for the Stripe customer"},"client_id":{"type":"string","description":"Optional idempotency key for the Checkout session"}}},"serverUrl":"https://cooperemail.com/mcp","transport":"http","handshake":"ok","host":"cooperemail.com","score":93,"grade":"A","auth":"oauth","lastScannedAt":"2026-10-30T13:05:15.807Z","stale":false,"permalink":"https://agentboardai.app/mcp/cooperemail.com/cooper_upgrade_link","page":"https://agentboardai.app/site/cooperemail.com"}