What is an MCP Server? How Greetu Makes Greeting Cards Accessible to AI Agents

AI Agents Need Tools, Not Just Text

Large language models like Claude, ChatGPT, and Gemini are incredibly good at writing, reasoning, and planning. But they live inside a chat window. They cannot browse the web, send emails, or — until now — create greeting cards.

That is where MCP comes in.

What is MCP?

MCP stands for Model Context Protocol. It is an open standard developed by Anthropic that lets AI assistants securely call external tools. Think of it as a USB-C port for AI: one protocol, any tool.

Instead of asking an AI to “write a birthday message for Mom” and then copying it into a card app yourself, an MCP-enabled agent can create the card directly.

Greetu is the First MCP Server for Greeting Cards

Greetu exposes a full MCP server at https://greetu.io/api/mcp. This means any compatible AI agent can:

Create personalized greeting cards with AI-generated messages
Schedule cards for future delivery
Fetch replies and reactions from recipients
Register webhooks for real-time event notifications
Bulk-import team contacts via CSV

How It Works in Practice

Here is what a Claude Desktop user might type:

“Create a birthday card for Sarah. She loves hiking and dogs. Schedule it for tomorrow morning.”

Claude, connected to Greetu via MCP, would:

Call greetu.create_card with the occasion, recipient name, and a custom message
Call greetu.schedule_card to set the unlock time
Return a shareable link the user can send to Sarah

No copying. No pasting. No switching apps.

Supported Platforms

Greetu MCP works with any MCP-compatible client:

Claude Desktop — official Anthropic support
Cursor — AI-powered code editor with MCP integration
VS Code — via Cline, Roo Code, or other MCP extensions
Zed — built-in MCP support
Custom agents — using the official MCP SDK in Python, TypeScript, or any supported language

Free to Start, No Signup Required

Developers can get an API key instantly with anonymous signup — 20 free credits, no email required. Email signup gives 50 credits plus key recovery.

Explore the full MCP documentation →

Why This Matters

AI agents are becoming the primary interface for productivity. The apps that expose themselves as MCP servers will be the ones agents choose by default. Greetu is the first — and currently only — greeting card platform built for this future.

If you are building an AI agent, adding Greetu gives your users the ability to send thoughtful, personalized cards without ever leaving the chat.