Letters by post
Your AI assistant writes the letter and Deutsche Post delivers it, to Germany and 217 other countries. You approve each letter or let your assistant pay from a balance you top up. You can live anywhere.
When it has to be paper
Authorities, courts and many contracts accept a letter, not an email, and some things simply land better on paper. Your assistant writes it, Deutsche Post delivers it, to Germany and 217 other countries.
Business letters abroad
Invoices, payment reminders, offers and formal notices to customers and suppliers
Authorities and courts
Tax offices, immigration and registration offices, courts, embassies and consulates
Objections and appeals
Against decisions, notices and fines, with proof of delivery
Cancelling contracts
Gym, phone, insurance, subscriptions and energy, wherever a letter is required
Landlords, banks, employers
Notices of defects, applications and formal notices that must be in writing
Family and friends
Personal letters to 217 countries, without printer or stamps
How a letter is sent
First, your assistant hands over the addresses and the letter.
We check the format and the address window (DIN 5008) and choose the postage by size and destination.
Then you see the preview and the price.
The letter appears with a Deutsche Post specimen stamp. Nothing is charged up to here.
Finally, you approve it.
On our page, not in the chat. Without a balance you topped up yourself, an assistant cannot buy anything.
create_letter
{
"sender": { "name": "Jonas Weber", "city": "Hamburg" },
"recipient": { "name": "Atelier Lumière SARL", "country": "FR" },
"registered": true,
"delivery": "automatic"
}Review and approve
To Atelier Lumière SARL, 12 rue des Archives, 75004 Paris, France
€6.49
The letter is dispatched on the next working day.
Send with obligation to payTwo ways to the post
Print it yourself
You get the PDF with valid postage in the address window, print it and post it in Germany. Available to senders in Germany.
Automatic dispatch
After payment the letter goes through Deutsche Post automatically. Within Germany 95 percent arrive by the fourth working day after approval. For senders outside Germany this is how every letter travels.
One price per letter
The price depends on the Deutsche Post letter format and on who prints. Postage is included. Registered mail and international letters add Deutsche Post's extra postage at cost.
2.49€
- Letter of up to 3 pages within Germany, sent for you, postage included
- To other countries from €2.79
- €0.20 less from a prepaid balance
- Document check and preview before every purchase
- Status page and history for every letter
| Length | Germany | Germany, registered | Abroad | Abroad, registered |
|---|---|---|---|---|
| 1–3 pages, print yourself | €1.49 | €3.84 | €1.79 | €5.49 |
| 1–3 pages, automatic dispatch | €2.49 | €4.84 | €2.79 | €6.49 |
| 4–8 pages, print yourself | €1.69 | €4.04 | €2.39 | €6.09 |
| 4–8 pages, automatic dispatch | €2.99 | €5.34 | €3.69 | €7.39 |
| 9–40 pages, print yourself | €2.49 | €4.84 | €3.99 | €7.69 |
| 9–40 pages, automatic dispatch | €4.49 | €6.84 | €5.99 | €9.69 |
Total prices including postage, based on the current Deutsche Post price list. If Deutsche Post changes its postage, prices change by the same amount. Germany: Einschreiben Einwurf. Abroad: Einschreiben International. €0.20 less per letter from a balance. Postage is passed through without VAT.
What the service does
Registered mail with tracking
Every registered letter gets a tracking number. We fetch the Deutsche Post status and show it to your assistant and on the status page.
Approval or balance
You approve each letter yourself, or your assistant orders from a balance you topped up. What is bought is exactly the version shown in the preview.
Recipients in 218 countries
Domestic postage for recipients in Germany, international postage for everyone else. Addresses follow Universal Postal Union rules, and the preview shows the transit time.
A complete record
Every step of a letter is written to an append-only log. Checksums prove which document was sent.
Data protection under the GDPR
Documents and addresses are deleted after fixed periods, or immediately on request. Processing takes place in Germany.
Delivered by Deutsche Post
Every letter runs through Deutsche Post's sorting centres and is postmarked there like any other letter.
Connect
The service speaks the Model Context Protocol. Any assistant or app that supports remote MCP servers can send letters, for example Claude as a custom connector.
Sign-in uses OAuth 2.1 with PKCE. Clients register themselves, and each account sees only its own letters. For your own agents there are API keys that work as bearer tokens.
MCP endpoint, Streamable HTTP
https://office.sommon.de/mcp
| Tool | Purpose |
|---|---|
create_letter | Start a letter: sender, recipient, delivery, registered mail |
submit_letter_text | Hand over the text, typeset as a business letter, get preview and price |
submit_letter_pdf | Hand over a finished PDF, get preview and price |
create_payment_link | Create a payment link, the user pays for this letter in the browser |
purchase_letter | Buy and send from the prepaid balance |
list_letters | List earlier letters of the account |
get_account | Balance and daily limit |
get_letter_status | State, history and Deutsche Post tracking |
delete_letter | Delete a letter and its data |
list_postage_products | Deutsche Post formats and extra services |
Questions
Can Claude or another AI assistant send a real letter by post?
Yes. Connect SOMMON Office as a remote MCP server at https://office.sommon.de/mcp. The assistant writes the letter with you and shows a preview with the price. You approve and pay in the browser, or the assistant pays from a balance you topped up, within a daily limit. Deutsche Post delivers the letter, as ordinary or registered mail.
Which countries can I send letters to?
Germany and 217 other countries, every destination on the Deutsche Post country list except those where Deutsche Post has suspended letter mail. The preview states the expected transit time; within Europe it is usually two to eight working days.
Can I send letters to other countries?
Yes, to 217 countries: invoices and payment reminders to customers, letters to authorities, embassies and consulates, contract notices and personal letters. The assistant can write in the recipient's language, and the address is laid out according to the rules of the destination country. Einschreiben International adds a tracking number.
I live outside Germany. Can I use it?
Yes. Your letter is sent by Deutsche Post with German postage. The return address names you care of our address in Germany, so an undeliverable letter comes back to us and we tell you. Self-printing is only available to senders in Germany.
Can I write to an authority or cancel a contract by letter?
Yes. Tell your assistant who the letter is for and what it is about, for example a tax office, an immigration office, an insurer or a gym. Send it as registered mail when a deadline applies: you get a tracking number and documented delivery. Some terminations legally need a handwritten signature, for example certain employment or tenancy terminations. Automatically sent letters carry no handwritten signature, so for those the letter has to be signed by hand.
What does a letter cost?
A letter of up to three pages within Germany costs €2.49 including postage, sent for you, or €1.49 if you print it yourself. To other countries it costs €2.79. As registered mail it costs €4.84 within Germany and €6.49 abroad. Longer letters cost more; paying from a balance saves €0.20 per letter. The preview shows the final price before you pay.
Is Einschreiben the same as certified mail or recorded delivery?
It is the German equivalent. Within Germany, Einschreiben Einwurf has a tracking number and Deutsche Post documents delivery to the letterbox; a return receipt signed by the recipient is available as an option. Einschreiben International has a tracking number too, though for many countries tracking ends when the letter leaves Germany.
Which languages can the letter be in?
The service typesets letters in German, English, French, Spanish, Italian, Dutch, Polish and Portuguese, with the date format and closing of that language. A finished PDF can be in any language. Addresses are laid out according to the rules of the destination country.
How fast does a letter arrive?
Within Germany, 95 percent of letters are delivered within four working days after payment and 99 percent within five. For other countries the preview states the transit time of the destination.
How is VAT handled?
We pay the Deutsche Post postage in your name and pass it on without VAT. Our service fee includes 19% German VAT. Businesses in other EU countries with a valid VAT ID and businesses outside the EU pay the fee net; the invoice then shows the reverse charge.
Can an assistant buy without my approval?
Only from a balance you topped up yourself, and only up to the daily limit. Without a balance, the assistant creates a payment link and you pay for the letter yourself on our page.
What happens to my data?
The document is deleted 30 days after the last step, the addresses after 120 days, or immediately on request. Only order records without names or content are kept, as tax law requires. Everything is processed on servers in Germany under the GDPR.
Anyone can sign up. Create an account, connect your assistant, and your first letter can be on its way in a few minutes.