"Calibre-Web" matching MCP connectors:

Web Push (VAPID), Android (FCM), iOS (APNs), In-App Popup, Toast & Transactional Email OTP engine.

Free agent tools, no sign-in: browser flows, test inboxes, web extract, site and domain checks.

32 pay-per-call x402 tools: x402 seller audit, invoice intake, OCR, PDF, email, web, on-chain

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ai.powerline

Render HTML/.eml emails in real Gmail, Outlook & Yahoo web clients and screenshot them

Agent tools: clean web screenshots/PDFs, PDF & image OCR to Markdown, PageSpeed audits, email checks