Support

Write to support@postalref.com for help with postalref: a wrong answer, a broken page, the MCP server or a kept page to delete.

Updated November 8, 2026

What to send

For a wrong or outdated answer: the page's address, what it should say, and the USPS document that says so.
For Ask: the address of the kept page.
For the MCP server: your agent or client, the tool it called, what it sent and when.
To delete a kept page: its address.

Adding postalref to an agent

The homepage shows how to add the MCP server to Claude, ChatGPT, Cursor and other clients. An agent without MCP can read llms.txt, which lists every page as Markdown.

Help with your mail

postalref isn't USPS and can't see your mail, your packages or your USPS account. For a lost package, a refund or an account, contact USPS.