MarketNow Registry / Developer Tools / letters

letters

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

Developer Tools v1.0.0 by app.frankki

Trust score

85/100

Install risk

Review advised

Source

official-registry

Indexed

2026-09-10

Install

$ https://mcp.frankki.app

Heuristic signals advise review before installing: young package, low adoption, stale repository, or name similarity to a popular package.

How MarketNow scored this

Sentinel Index Heuristics — a security-first estimate from public signals:

Package age and release activity (stale repositories lose points)
Verified adoption: registry downloads or GitHub stars, not follower counts
Typosquat distance against the 150 most-installed MCP packages
Injection markers scanned in the package description

Heuristic, not a guarantee. For verified agent credentials and revocation, see the MarketNow Trust API.

What is letters?

The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in. Indexed by MarketNow with trust 85/100 (Review advised).

How do I install it?

Run $ https://mcp.frankki.app Heuristic signals advise review before installing: young package, low adoption, stale repository, or name similarity to a popular package.

What does the trust score mean?

Security-first heuristic over public signals (age, adoption, typosquat distance, injection markers). It is not a popularity ranking and not a guarantee of safety. letters scores 85/100.