Send a letter from Continue.dev.

Add paperplane to Continue.dev’s config.yaml and it can quote and send a real USPS letter — no account required, free sandbox mode included.

Free to preview — see the exact PDF before you pay. Sending starts at $1.99, no account required.

Set it up in Continue.dev

Step 1

Add to .continue/config.yaml

Hyphenated "streamable-http" — the opposite convention from Cline’s camelCase.

mcpServers:
  - name: paperplane
    type: streamable-http
    url: https://sendpaperplane.com/api/mcp

Try it: free, nothing mailed

Tell your agent:

Using the paperplane tools, quote a 1-page certified letter to Property LLC, 1 Main St, Richmond VA 23220, then send it in sandbox mode.

Not on Continue.dev? Any surface works.

The same three calls from the CLI, any MCP client or plain REST. Sandbox is free and mails nothing.

Send a letter

mcpServers:
  - name: paperplane
    type: streamable-http
    url: https://sendpaperplane.com/api/mcp

All agents · API docs

Common questions

Does Continue.dev use the same config shape as Cline?

No — Continue.dev uses the hyphenated "streamable-http", the opposite convention from Cline’s camelCase "streamableHttp", and its config file is YAML rather than JSON.

What tools does it get?

quote_letter, send_letter, and get_letter_status for mailing, plus buy_credits for pre-funding sends. Postcards are live (from $1.99) via the REST API’s format field, though not yet an MCP tool argument.

How much does sending cost?

Letters start at $1.99 for First-Class; Certified Mail starts at $12.99. Sandbox mode is free.