FrankKi is answering right now. Last checked 11 min ago. It exposes 4 tools. Last commit 11 Sep 2026.
The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 13 September 2026. No other catalogue keeps this.
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.
claude mcp add letters --transport http https://mcp.frankki.app
{
"mcpServers": {
"letters": {
"url": "https://mcp.frankki.app"
}
}
}
[mcp_servers.letters]
url = "https://mcp.frankki.app"
{
"mcpServers": {
"letters": {
"url": "https://mcp.frankki.app"
}
}
}
{
"mcpServers": {
"letters": {
"url": "https://mcp.frankki.app"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
address_validate
mcp_health
pricing_tiers
shipping_quote
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://mcp.frankki.app | streamable-http | answering | 196 ms | 11 min ago |
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Answers built from our own checks of this server.