MCP server

Card Mailer

me.onmax/card-mailer

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

onmax.me (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 2,089 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http card-mailer https://cards.onmax.me/mcp/claude

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.card-mailer]
url = "https://cards.onmax.me/mcp/claude"

Gemini CLI

{"mcpServers":{"card-mailer":{"httpUrl":"https://cards.onmax.me/mcp/claude"}}}

Cursor

{"mcpServers":{"card-mailer":{"url":"https://cards.onmax.me/mcp/claude"}}}

VS Code

{"servers":{"card-mailer":{"type":"http","url":"https://cards.onmax.me/mcp/claude"}}}

Antigravity

agy mcp add card-mailer https://cards.onmax.me/mcp/claude

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"card-mailer","server_url":"https://cards.onmax.me/mcp/claude","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"card-mailer","server_url":"https://cards.onmax.me/mcp/claude"}

Tools

• create_mailing ~365 tokens
  Use this when the user has seen the card and the quote and says they want to order. Creates an unpaid order for the ready recipients in list_id with design_id and returns a link to cards.onmax.me, where the user reviews the recipients and pays. Nothing is printed, mailed or charged until the user pa
• design_card ~486 tokens
  Use this to create or edit the printed 5x7 postcard: a greeting on the front over or under the photo, and a message and sign-off on the back. Pass the photo the user attached as photo, or a public https image URL as photo_url; the image is downloaded and stored on cards.onmax.me. Without a photo the
• fix_address ~308 tokens
  Use this to correct or remove one recipient in a list from import_address_list, by row number. Given fields replace the stored values and omitted fields keep theirs; if the row's problem says it could not be read, pass name, line1, city, state and zip together. Re-checks the address with USPS data.
• get_mailing_status ~148 tokens
  Use this when the user asks whether a Card Mailer order was paid, printed, mailed or delivered. Takes the mailing_id returned by create_mailing (also the last part of the order link). Returns the status, send date, expected arrival and per-recipient counts. Does not change the order or track other U
• import_address_list ~345 tokens
  Use this when the user wants to mail printed cards to people at US postal addresses and gives the addresses as pasted text, a CSV, or an .xlsx spreadsheet. Reads names and addresses, checks each against USPS data, and saves them as a recipient list. Returns a list_id, how many rows are ready, and th
• quote_mailing ~437 tokens
  Use this when the user asks what mailing a card to an imported list costs or when it will arrive. Returns the price per card (First-Class postage included), the total for the ready recipients, the send date and the expected arrival window. For a card preview with the price, first create or edit it w

Browse

• Spreadsheets
• Email
• Advertising
• Image generation

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