Claude

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Claude can draft, price and post letters for you. The connection runs over MCP, so it works in the Claude app, in Claude Code and in any other client that speaks MCP.

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Cosa può farci

Ask for a cancellation letter, have it quote the price, and send it once you agree.
Have an address checked before anything is printed.
Ask what happened to a letter you sent last week, without opening the site.

Come collegarla

In Claude, open settings and add a custom connector.
Enter https://onlinebriefversturen.nl/api/mcp as the address.
Sign in with your SendLetter account and approve the consent screen.

Sending is a separate step that always needs a quote first, so Claude cannot post a letter in one move. A letter cannot be taken back out of a postbox, and that risk should not sit with an assistant.

API documentation