Category
Best Letters AI Skills & MCP Servers
2 curated Letters skills and MCP servers — install any of them into Claude, Cursor, ChatGPT, n8n, or any AI stack with one command.
Server Pingen
MCP Registry
Pingen hybrid mail MCP server — physical letters, mass-mailing batches, Swiss eBill
MCP Registry · ★ 5.0free
Server
MCP Registry
DOOMSCROLLR MCP server — AI agents build owned-audience websites, affiliate storefronts, product drops, newsletters, tickets, and subscriber capture for the audience layer of the AI agent world.
MCP Registry · ★ 5.0free
About Letters skills on iClaude
iClaude is the universal install layer for AI skills. Every Letters skill on this page can be installed into Claude Code, Claude Desktop, Cursor, ChatGPT, n8n, Codex, and more — using a single copy-paste command. No config drift, no per-stack adapters, no manual MCP wiring.