Card Mailer for ChatGPT

me.onmax/card-mailer

Print and mail 5x7 holiday and thank-you photo cards to a US address list. $2.49/card incl. postage.

client:ChatGPT transport:streamable-http tools:6

Install Card Mailer in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cards.onmax.me/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs