The first MCP server for physical mail
Send tracked postcards and letters in one API call, or just ask your AI agent. Subscribe for $99 a month and every piece ships at wholesale. From $0.58 per piece, no minimums.
MCP · plain-language prompts · live in Claude, ChatGPT & Cursor
Get your API key in under a minute.
Need an enterprise walkthrough? Talk to an engineer.
Three lines of code, or one MCP call. We handle design, data, print, postage, and tracking.
Subscribe for $99 a month and every piece ships at wholesale. No volume tiers, no negotiation.
We print it ourselves. The price is the real cost, not a markup off retail.
The same send the agent makes, straight from your stack. Official SDKs in Python, Node, PHP, and Go.
import Mailstream from "mailstream";
const ms = new Mailstream(process.env.MAILSTREAM_KEY);
await ms.postcards.create({
size: "4x6",
to: { name: "Jane Doe", address: "123 Main St, Tampa FL 33602" },
from: { name: "Acme", address: "1 Maker Way, Austin TX 78701" },
front_template_id: "tpl_new_listing",
variables: { first_name: "Jane", agent_name: "Sam Park" },
});The offer
Most direct mail vendors charge you retail and pocket the markup. We are the manufacturer. Subscribe for $99 a month and every postcard and letter ships at our cost.
No volume tiers. No negotiation. No “contact us for pricing.” The subscription pays for itself the first time you send a real campaign.
Get your API key →Debug in minutes, not days. Every error includes a fix hint and a doc link.
v1 is stable. Breaking changes get a new version, never a surprise.
Test without sending real mail. Every account starts here by default.
Safe to retry. Duplicate requests with the same key return the original result.
Cursors, not pages. Filter by status, date, recipient, or custom metadata.
Printed, mailed, scanned, delivered. Each as a separate event with full piece context.
Building something bigger?
High volume, white-label, an SLA, or a migration off Lob or PostGrid? Book a technical walkthrough and we'll scope the integration with you.
Tell us what you're sending. We'll reach out within one business day to walk you through it.
API key in minutes. Sandbox mode. Copy-paste examples in your language. Subscribe when wholesale rates save you more than the monthly fee.