Send mail from Dropbox

Mail a PDF straight from Dropbox: use “Choose from Dropbox” on paperplane’s send page ($1.99 First-Class), or pass a Dropbox direct-download link as pdf_url to the REST API for automation.

Native Dropbox chooser on the send page

Instead of sharing the link and asking them to print it

A share link asks the recipient to open, print and file the document. A mailed copy arrives already done, with a tracking number if you need one, and the chooser takes the same file you would have linked.

How to set it up

1On the send page, choose Upload → Choose from Dropbox and pick the PDF (text-based, up to 12 pages).
2Add recipient and return addresses — both verified against USPS data.
3Pay — mailed the next business day, with email status updates.
4Automating: a Dropbox share link converts to a direct-download URL (dl.dropboxusercontent.com with dl=1) and works as pdf_url in POST /v1/orders.

Order from a Dropbox direct-download URL

{
  "mail_class": "first_class",
  "pdf_url": "https://dl.dropboxusercontent.com/s/abc123/letter.pdf?dl=1",
  "to":   { "name": "Maria Alvarez", "line1": "1 Main St",
            "city": "Richmond", "state": "VA", "zip": "23220" },
  "from": { "name": "Alex Rivera", "line1": "12 Grove Ave",
            "city": "Richmond", "state": "VA", "zip": "23221" },
  "email": "alex@example.com"
}

Under the hood

The chooser is Dropbox’s own embedded picker — we receive a one-time link to the file you select, nothing else. For automation, standard share links serve a preview page, not the file; convert to the direct-download form so the API can fetch the raw PDF.

Supported action fields

Every integration maps into the same fixed set of fields, the ones the REST API and MCP tools take directly.

Field	What it does
mail_class	first_class, certified, certified_return_receipt, or priority
text or pdf_url	the letter body as plain text, or a fetchable PDF to print as-is
to	recipient name + street/city/state/zip, verified against USPS data
from	return address, printed on the envelope and used for undeliverable mail
email	where the receipt and status updates go — no account required

Popular Dropbox workflows

Dropbox → mailed letter

A new (or updated) file appears in a watched Dropbox folder.

Or skip the automation tool: ask Claude or ChatGPT

Every integration here sits on the same MCP endpoint agents use directly. Instead of wiring a trigger to an action, ask Claude or ChatGPT to draft and mail the letter. Same three tools (quote_letter, send_letter, get_letter_status), same price, same free sandbox.

Send mail from Claude Send mail from ChatGPT

Related integrations

Google Sheets

HubSpot

Slack

Send your first letter from Dropbox.

Sandbox runs the whole pipeline for free and mails nothing. Live sends start at $1.99, one all-in price.

Send a letter

curl -X POST https://sendpaperplane.com/v1/orders \
  -H 'Content-Type: application/json' \
  -d '{
    "mail_class": "first_class",
    "sandbox": true,
    "text": "Dear Ms. Alvarez, ...",
    "to":   { "name": "Maria Alvarez", "line1": "1 Main St",
              "city": "Richmond", "state": "VA", "zip": "23220" },
    "from": { "name": "Alex Rivera", "line1": "12 Grove Ave",
              "city": "Richmond", "state": "VA", "zip": "23221" },
    "email": "alex@example.com"
  }'

All integrations · API docs

Common questions

What access does paperplane get to my Dropbox?

Only the file you pick in Dropbox’s own chooser, via a one-time link. We never browse your Dropbox, and documents are deleted 30 days after delivery.

Why did my Dropbox share link fail as pdf_url?

Standard share links serve a preview page, not the file. Convert to the direct-download form (dl.dropboxusercontent.com / dl=1) so the API fetches the raw PDF.

What PDFs are supported?

Text-based PDFs up to 12 pages. Scanned-image PDFs aren’t supported — re-export from the original document instead.