Send a PDF by mail.
POST /v1/letters/quoteUpload a PDF, enter the sender and recipient, and Courio prints it and posts it as a real letter — standard, tracked, registered, or registered with proof of delivery. No account, no subscription: you see the full price, VAT included, before you pay.
What you get
- No account
- auth: none
- No signup, no subscription. You need the PDF and two addresses.
- Price before you pay
- price.tax_included: true
- Exact total, VAT included, fixed for 24 hours. A quote mails nothing.
- Four postal services
- service
- Standard, tracked, registered, or registered with proof of delivery.
- Posted in-country
- fulfillment: automated
- Printed and posted locally in 10 countries as the destination’s own postal product.
Registered mail, by country
Each destination is posted as its own legal product. Pick a country for its services, delivery estimate and starting price:
- Registered letter to Austria AT
- Registered letter to Belgium BE
- Registered letter to France FR
- Registered letter to Germany DE
- Registered letter to Luxembourg LU
- Registered letter to Netherlands NL
- Registered letter to Spain ES
- Registered letter to Switzerland CH
- Registered letter to United Kingdom GB
- Registered letter to United States US
See every supported country and service, including standard international mail to the rest
of the world, or the live data at GET /v1/coverage.
Postal services
service- Standard letter
- standard · No proof
- Ordinary mail for replies, reminders and everyday documents.
- Tracked letter
- tracked · Tracking number
- Delivery is tracked, without a signature from the recipient.
- Registered letter
- registered · Proof of mailing
- Proof that the letter was handed to the postal service on a given date.
- Registered with proof of delivery
- registered_ar · Proof of delivery
- Proof that the recipient received it: terminations, formal notices, deadlines.
Questions
Can I send a PDF by post without an account?
- Yes. Upload the PDF, enter the sender and recipient addresses, and you get an exact, VAT-included price. There is no signup and no subscription: you pay that one letter and it is posted.
What does it cost to post a PDF?
- The price depends on the destination, the number of pages, the postal service and colour printing. The quote shows the full total before payment and is capped at €50 per letter.
Which countries can I post to?
- Letters to Austria, Belgium, France, Germany, Luxembourg, Netherlands, Spain, Switzerland, United Kingdom, and United States are printed and posted by a partner in that country. Other countries can receive a standard international letter, sometimes handled manually with a longer delay shown in the quote.
What happens to my PDF, and can I get proof?
- It is stored privately, never at a public address, and screened for abusive content before the quote. Tracked and registered services add tracking and proof; proofs are kept for 10 years. A paid letter that cannot be posted is refunded automatically.
Can an AI agent send a letter?
- Yes — through this website, the REST API or the hosted MCP server, without an account. Many agents cannot pay by themselves and will hand you a payment link instead.