LetterAgent
Mail physical letters by just asking your AI assistant.
Library Mail is a US-only USPS service, and it exists only inside the United States. It is a discounted postage rate for books and similar printed material moving between libraries, schools, museums, and qualifying nonprofit organizations. One side of the transaction must be a qualifying institution, the contents must meet the eligibility rules, and the package can be opened for inspection.
| Library Mail | Media Mail | |
|---|---|---|
| Who can use it | Qualifying institutions (libraries, schools, museums, nonprofits) on at least one end | Anyone |
| Eligible contents | Books, printed music, test materials, sound and video recordings, and similar items | Books, recordings, film, manuscripts, and printed educational material |
| Inspection | Yes, contents can be opened and checked | Yes, contents can be opened and checked |
| Speed | Surface/deferred, like Media Mail; not a fast service | Surface/deferred; not a fast service |
Not on your own. The whole point of the rate is institutional exchange: at least one party must be a qualifying library, school, museum, or nonprofit. A member of the public cannot drop a box of books at the counter and ask for Library Mail rates. If you are mailing books yourself, Media Mail is the service you actually want, and it takes anyone.
Books are the main item, along with printed music, bound volumes of academic theses, sound recordings, video recordings, and similar educational material. Advertising is the hard line: contents that carry commercial advertising do not qualify. The eligibility list is narrower than people expect, and the post office checks, so stuffing a non-qualifying item into a Library Mail package to save postage backfires when it is opened.
Media Mail is the general-public cousin: same inspection rules, same slow surface handling, same eligibility style, but open to anyone mailing books or media to anyone else. Library Mail is the institutional variant with its own rate table and its own eligibility gate. In practice they look alike on the shelf, which is why the two names get confused; the difference is who is allowed to mail, not what is inside the box.
The institution prepares the package, marks it clearly as Library Mail, and presents it at the counter or through its normal USPS pickup. There is no self-service kiosk option for it in practice, because the clerk verifies the institutional eligibility. Heavy books get heavy fast, so the per-pound rate structure rewards weighing accurately up front rather than guessing and paying for a return.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com