# FrankKi (slim)

> FrankKi, an MCP server by frankki.app, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.

- Full: https://www.anchorterminal.com/tools/frankki-letters.md (~850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/tools/frankki-letters.json · canonical https://www.anchorterminal.com/tools/frankki-letters
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

# FrankKi

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by frankki.app (https://frankki.app/en/mcp)
- Listed because: It's published in the registry under frankki.app, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.

## Facts

- MCP registry: `app.frankki/letters` 1.0.0
- Endpoint: https://mcp.frankki.app (streamable HTTP)
- Source: https://github.com/datPascal/frankki-mcp
- Website: https://frankki.app/en/mcp
- GitHub stars: 1
- Registry entry updated: 2026-08-07

## Tools

- Tools it lists (4, about 2,204 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:21 UTC):
  - `mcp_health` (read-only): Health-/Echo-Probe - prüft das Partner-Token und die Verarbeitungskette von Anfang bis Ende und sagt dir unter setup, welche Voraussetzungen für einen echten…
  - `address_validate` (read-only): Prüft eine Adresse anhand landesspezifischer Regeln und meldet harte Fehler als ADDRESS_INVALID. Nur eine Prüfung, das Adressbuch bleibt unverändert; zum…
  - `shipping_quote` (read-only): Registered-mail availability follows the destination's current catalog. The codes einschreiben_einwurf and einschreiben_uebergabe are German products;…
  - `pricing_tiers` (read-only): Liefert die Staffelpreise (Mengenrabatte) von FrankKi: ab welcher Monatsmenge welcher Beispielpreis pro Brief gilt. Nutze das, wenn jemand nach Mengenrabatt,…
- How its tools read to an agent (0 errors, 5 warnings, 1 note, about 2,204 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):
  - warn TC07 shipping_quote: the description is about 663 tokens
  - warn TC11 address_validate: 11 parameters without a description: addressType, city, company, houseNumber, isDefault, mandantennummer and 5 more
  - warn TC11 mcp_health: 1 parameter without a description: reasoning
  - warn TC11 pricing_tiers: its one parameter, reasoning, has no description
  - warn TC11 shipping_quote: 2 parameters without a description: express, reasoning
  - note TC24 server: 4 of 4 tools have no outputSchema

- JSON: https://www.anchorterminal.com/api/v1/tools/frankki-letters.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming