MarketNow Registry / Developer Tools / postal-mcp

postal-mcp

A mailbox system for MCP, so that two agents can chat

Developer Tools v0.1.0 by Tim Kellogg <timothy.kellogg

Trust score

40/100

Install risk

Runs registry code

Source

pypi

Indexed

2026-09-10

Install

$ uvx postal-mcp

Installing via npx/uvx/npm install executes arbitrary code from the public registry on your machine. This is the install-risk semantic of the MarketNow catalog — verify the publisher before running it.

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 postal-mcp?

A mailbox system for MCP, so that two agents can chat Indexed by MarketNow with trust 40/100 (Runs registry code).

How do I install it?

Run $ uvx postal-mcp Installing via npx/uvx/npm install executes arbitrary code from the public registry on your machine. This is the install-risk semantic of the MarketNow catalog — verify the publisher before running it.

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. postal-mcp scores 40/100.