MCP server

FrankKi Official

app.frankki/letters

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.

Website Source

At a glance

Type

MCP server

Publisher

frankki.app (verified by the MCP Registry)

Status

Working at last check

Tools

4

Token cost

About 2,318 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http letters https://mcp.frankki.app

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.letters]
url = "https://mcp.frankki.app"

Gemini CLI

{"mcpServers":{"letters":{"httpUrl":"https://mcp.frankki.app"}}}

Cursor

{"mcpServers":{"letters":{"url":"https://mcp.frankki.app"}}}

VS Code

{"servers":{"letters":{"type":"http","url":"https://mcp.frankki.app"}}}

Antigravity

agy mcp add letters https://mcp.frankki.app

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"letters","server_url":"https://mcp.frankki.app","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"letters","server_url":"https://mcp.frankki.app"}

Tools

• address_validate ~296 tokens
  Prüft eine Adresse anhand landesspezifischer Regeln und meldet harte Fehler als ADDRESS_INVALID. Nur eine Prüfung, das Adressbuch bleibt unverändert; zum Anlegen oder Ändern einer Adresse nimm address_upsert. EN: Validates an address using country-specific rules and reports hard failures as ADDRESS_
• mcp_health ~470 tokens
  Health-/Echo-Probe - prüft das Partner-Token und die Verarbeitungskette von Anfang bis Ende und sagt dir unter setup, welche Voraussetzungen für einen echten Versand schon erfüllt sind (Absender-Profil, AVV, Guthaben, Sandbox, Freigabe, Briefpapier) und was der nächste Schritt ist. Jeder Schritt trä
• pricing_tiers ~287 tokens
  Liefert die Staffelpreise (Mengenrabatte) von FrankKi: ab welcher Monatsmenge welcher Beispielpreis pro Brief gilt. Nutze das, wenn jemand nach Mengenrabatt, Volumenpreis, Staffelpreis oder Großkundenpreis fragt. Die Beispielpreise gelten für einen einseitigen Standardbrief in Schwarzweiß innerhalb
• shipping_quote ~1265 tokens
  Registered-mail availability follows the destination's current catalog. The codes einschreiben_einwurf and einschreiben_uebergabe are German products; Switzerland uses ch_einschreiben. For other destinations, use methods returned in availableDeliveryTypes by a standard shipping_quote for that countr

Browse

• Website monitoring
• PDF tools
• Running code
• Translation

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