Send physical letters worldwide from your agent or app
FrankKi is the send layer for real postal mail. Draft or upload, we print and post. Stripe for letters, the second channel for your software.
Raw delivery, no German paperwork imposed
For non-German senders we do not impose the German mandatory-imprint requirements. You send raw content and we deliver it. The German compliance floor is available if you want it, never forced on you.
Worldwide reach
DACH local (Germany, Austria, Switzerland), EU-local (France, Netherlands, United Kingdom, Belgium, Luxembourg, Spain), and the rest of the world via DHL in four to eighteen business days. Delivery runs through local postal partners in each country.
Per-destination pricing, quoted at order time
International letters are priced per destination when you place the order. We never show a fixed international price, because postage differs by country.
MCP, API and dryRun
One send core for the agent path and the web path, the same gates. Scoped, instantly revocable tokens and a live OAuth 2.1 connector. OAuth 2.1 with PKCE (S256) and Dynamic Client Registration (RFC 7591) is live in production at https://mcp.frankki.app, verified 2026-08-13 against https://mcp.frankki.app/.well-known/oauth-authorization-server. Before a real letter goes out, a send with dryRun: true runs the same checks and quotes the same price, without printing or charging. Regular accounts have no sandbox.
What you get
- Worldwide coverage: DACH local, EU-local, rest of world via DHL and local postal partners
- Per-destination pricing quoted at order time, never a fixed international price
- Scoped, instantly revocable tokens; OAuth 2.1 connector with PKCE (S256) and Dynamic Client Registration live in production, verified 2026-08-13
- Free dryRun rehearsal with the same checks as a real send
- German compliance floor (GoBD, proof of posting) available, not imposed
- Registered mail as drop-in or handover against signature where the destination supports it
- Where the destination supports it, registered mail is available as drop-in (with proof of posting) or handover against signature.
- We do not offer a return receipt (Rückschein) or a Postzustellungsauftrag.