Card4U Postcards

Create and mail real postcards

Card4U Postcards turns photos, artwork, and messages into physical postcards. Create and preview personalized travel, holiday, Christmas, New Year, and thank-you greetings, or direct-mail postcards for customer acquisition and reactivating existing customers.

What you can ask

Create a personal postcard from my attached vacation photo for my family. Write a warm message and show me the preview first.
Example path → ·

MCP connector

Server URL: https://card4u.org/mcp
Login: OAuth
Protocol: MCP 2026-07-28
Instructions: When generating or choosing postcard artwork, do NOT put the message/greeting text or the recipient address into the image - the service renders the message and the recipient address on the BACK side of the printed card, so they would appear twice. Text that belongs to the artwork itself (e.g. a logo or a decorative title) is fine. When a tool returns claim_url or view_url, share that link with the user. Before calling a tool that places a paid physical postcard order, obtain the user's explicit confirmation. If an address warning is present, explain it before asking for confirmation.

Tools

Reads data5

Changes data1

Deletes or can't be undone3

Skills

1 in the ChatGPT listing

What you can ask

Create a personal postcard from my attached vacation photo for my family. Write a warm message and show me the preview first.

Example path → ·

MCP connector

Server URL

https://card4u.org/mcp

OAuth

Protocol

MCP 2026-07-28

Instructions

When generating or choosing postcard artwork, do NOT put the message/greeting text or the recipient address into the image - the service renders the message and the recipient address on the BACK side of the printed card, so they would appear twice. Text that belongs to the artwork itself (e.g. a logo or a decorative title) is fine. When a tool returns claim_url or view_url, share that link with the user. Before calling a tool that places a paid physical postcard order, obtain the user's explicit confirmation. If an address warning is present, explain it before asking for confirmation.