MailCheap MCP: Claude, ChatGPT and Grok Bot run your newsletter
Marc Lou’s MailCheap exposes Streamable HTTP MCP at https://mailcheap.ai/mcp so ChatGPT, Claude and Grok Bot connect with OAuth (no key to copy); Claude Code, Codex and Cursor use a bearer API key. Agents can draft campaigns, send tests, schedule issues and read stats; schedule/send tools are marked destructive and ask before sending. Open-source / self-host option; pay only for SES-style sends vs beehiiv-class plans.
Save ideas in this browser. Upvotes count across the board.
Skysay’s hosted Streamable HTTP MCP (https://api.skysay.ai/mcp) lets Grok Bot check coverage, request numbers, place approved outbound calls through a hosted voice agent, and send SMS—OAuth/PKCE, separate call vs SMS approval, no local Twilio bridge. Start read-only with account_overview; outside US/CA/UK/MX outbound often needs carrier review first.
Kondo’s WhatsApp MCP (Streamable HTTP at mcp.trykondo.com/mcp) lets Claude, ChatGPT, Cursor, Claude Code and Copilot search chats, read messages, draft replies, label, reminder and archive while Kondo Desktop holds the local WhatsApp session—no send tool, so nothing leaves as a message until you press Send. Relay keeps chat content off the cloud; Desktop must stay open. MCP on Business/Enterprise plans; install skill at trykondo.com/skills/kondo-whatsapp.md.
MIT Go daemon + git hook reviews every commit with the CLIs you already pay for—Codex, Claude Code, Cursor, OpenCode, and first-class Grok Build (grok / grok-build). Findings stay in a ledger until closed; agent hooks push open review IDs back into the session for /roborev-fix before context goes cold. Reviews stay on your machine.
Official xAI guide: Share as Template packages instructions, skills, routines and first-party plugins into an anonymized blueprint (team or public link)—no secrets, custom code, MCP servers, logins or history. Installers get a fresh bot that must re-approve plugins; encode setup steps for API keys and custom MCP so others can reproduce the workflow.