MarketNow Registry / Developer Tools / @modelcontextprotocol/ext-apps

@modelcontextprotocol/ext-apps

MCP Apps SDK — Enable MCP servers to display interactive user interfaces in conversational clients.

Developer Tools v2.0.0 by Olivier Chafik

Trust score

80/100

Install risk

Runs registry code

Downloads / week

3,093,687

Source

npm-registry

Indexed

2026-09-12

Install

$ npx -y @modelcontextprotocol/ext-apps

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.

Adoption evidence: 3,093,687 weekly registry downloads.

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 @modelcontextprotocol/ext-apps?

MCP Apps SDK — Enable MCP servers to display interactive user interfaces in conversational clients. Indexed by MarketNow with trust 80/100 (Runs registry code).

How do I install it?

Run $ npx -y @modelcontextprotocol/ext-apps 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. @modelcontextprotocol/ext-apps scores 80/100.