Card Mailer

me.onmaxPublished by onmax.meOfficial publisherv1.0.2Updated Oct 31, 2026

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

VerifiedStreamable HTTPWeb executableBusiness & CommerceMedia & Design

Overview

AI-generated overview

Card Mailer lets an assistant import a US address list, design a 5x7 photo postcard, get a price quote, and place a print-and-mail order the user pays for.

What you can do
  • Import and fix recipients: read names and addresses from pasted text, CSV or xlsx, validate US address fields, and correct or remove single rows.
  • Design the card: create or edit the 5x7 postcard front greeting and back message, using an attached photo or a public image URL.
  • Quote a mailing: return price per card with First-Class postage, total for ready recipients, send date and arrival window.
  • Order and track: create an unpaid order with a payment link, then check whether it was paid, printed, mailed or delivered.
When to use it
Useful when someone wants physical holiday, thank-you or client greeting cards mailed to a list of US postal addresses and wants the assistant to handle the address list, card design, pricing and order status. Not intended for e-cards, email or advertising mail.
Requirements
A remote streamable HTTP endpoint at cards.onmax.me; no package, environment variables or headers are declared. The user needs a browser to review recipients and pay on the order link. US postal addresses only.
Before you install
create_mailing creates a real order and returns a link where the user pays; nothing is printed or charged until payment, but the order costs money per card. Recipient names and addresses are sent to the service, and photos passed by URL are downloaded and stored on cards.onmax.me. No authentication is declared, so check how the account and orders are tied to the user.

Installation

In SourceWeft

  1. Open Card Mailer in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/me.onmax%2Fcard-mailer/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

6

import_address_list

Import address list

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 required fields and US address format, and saves them as a recipient list. USPS verification runs only when it is configured; usps_checked in the result says whether it ran. Format checks alone do not confirm that an address is deliverable. Returns a list_id, how many rows are ready, and the problem for each row that needs fixing. Up to 300 recipients; pass list_id to append rows to an existing list. US addresses only. Not for e-cards or email, addresses outside the US, or advertising mail to purchased or rented lists.

Parameterslist_idaddress_fileaddresses_text

fix_address

Fix or remove a recipient

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-runs the required-field and US address format checks, plus USPS verification when it is configured. Format checks alone do not confirm that an address is deliverable. remove: true takes the recipient out of the mailing. Rows in a list that belongs to a paid order cannot be changed.

Parametersrowrequiredzipcitynameline1line2stateremovelist_idrequired

design_card

Design card

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 front is the greeting on a solid color. Pass design_id to edit a design: given fields replace the old values and omitted fields keep them. Use the message the user wrote or approved, up to 500 characters. Places the user's photo and text in a print template; does not generate images.

Parametersphotostylemessagegreetingsign_offdesign_idphoto_urlremove_photo

quote_mailing

Quote mailing

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 with design_card, then pass that exact design_id here. This shows the current saved front and back above the quote. design_id is required: use null only when the user requested a price-only quote without a design. Never claim a preview is shown when preview_included is false. If the cards must arrive by a date, pass arrive_by; the result gives the latest safe send date and whether that date can be met. Does not create an order or charge anything.

Parameterslist_idrequiredarrive_bydesign_idrequiredsend_date

create_mailing

Create order and payment link

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 pays on that page. Recipients that still need fixing are left out. Each call creates a separate order link, so call it once per order. Optional sender is printed as the US return address.

Parameterssenderlist_idrequiredarrive_bydesign_idrequiredsend_date

get_mailing_status

Mailing status

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 USPS mail.

Parametersmailing_idrequired

Version history

3
  1. v1.0.2LatestOct 31, 2026
  2. v1.0.1Oct 24, 2026
  3. v1.0.0Oct 22, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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