Send mail from your tools
Native apps for Zapier, n8n, and Make. MCP connectors for Claude, ChatGPT, and Cursor. File pickers for Drive and Dropbox. All of it sits on the same open REST API — no API key, per-letter payment, and a free sandbox so your first run costs nothing.
$1.99
All-in First-Class price — postage, paper, and envelope included
Next business day
Your letter is printed and handed to USPS
Millions of pieces/yr
Mailed through the commercial print network we run on
100%
Refunded automatically if we can’t mail your letter
Native surfaces
See all →How you send mail with no third-party tool at all: compose on the web, send from an email or text message, or hand it to an AI assistant directly.
Developer surfaces
Works with Claude, ChatGPT, Cursor, and any MCP-compatible agent.
SDKs
Planned# No typed client yet — the REST API is plain JSON, one fetch() call away.
Platform guides
ChatGPT
MCP connectorMCP connector for ChatGPT
Claude & MCP
MCP connectorNative MCP endpoint — the agent-first surface
Zapier
Native integrationNative app in the Zapier directory
Make
Native integrationListed app in the Make directory
n8n
Native integrationCommunity node — in the n8n nodes panel
Google Drive
Native integrationNative Drive picker on the send page
Notion
Native integrationPDF export + native automation apps
Cursor
MCP connectorMCP — one config block in Cursor
Dropbox
Native integrationNative Dropbox chooser on the send page
Google Sheets
Native integrationRow-to-letter via the native automation apps
HubSpot
Native integrationVia Zapier, Make, or n8n — no direct app yet
Slack
Native integrationVia Zapier, Make, or n8n — no direct app yet
Stripe
Native integrationVia Zapier, Make, or n8n — no direct app yet
Google Forms
Native integrationVia Zapier, Make, or n8n — no direct app yet
Airtable
Native integrationVia Zapier, Make, or n8n — no direct app yet
Webhook (generic)
Native integrationThe universal fallback — works with anything that can POST JSON
Popular workflows
Specific trigger-to-letter setups, hand-built.
Google Sheets bulk mail merge
A row in a Google Sheet is new, updated, or has a status column set to "send."
Notion → certified mail
A row in a Notion database changes status (e.g. moved to a "Ready to mail" view) or is created.
Google Drive → mailed PDF
A new (or updated) file appears in a watched Google Drive folder.
HubSpot → welcome letter
A new contact is created in HubSpot (or added to a specific list).
Slack → certified letter
A message is posted to a specific Slack channel, or a slash command is run.
Stripe → mailed invoice
A Stripe invoice is finalized or marked paid.
Google Forms → mailed confirmation
A new response is submitted to a Google Form.
Airtable → certified legal notice
A record enters a "Ready to Mail" view, or a status field changes.
Dropbox → mailed letter
A new (or updated) file appears in a watched Dropbox folder.
Any webhook → mailed letter
Any inbound webhook — a form on your own site, a CRM without a native automation trigger, an internal system event.
Send it however you already work
We support your method too — web, email, text or the CLI, one all-in price either way.