MarketNow Registry / Developer Tools / mcp-app-attest

mcp-app-attest

Tell app-initiated MCP tool calls apart from model-initiated ones. Signed attestation tokens for MCP Apps widgets.

Developer Tools v0.1.0 by rephol

Trust score

50/100

Install risk

Runs registry code

Downloads / week

Source

npm-registry

Indexed

2026-09-10

Install

$ npx -y mcp-app-attest

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: 19 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 mcp-app-attest?

Tell app-initiated MCP tool calls apart from model-initiated ones. Signed attestation tokens for MCP Apps widgets. Indexed by MarketNow with trust 50/100 (Runs registry code).

How do I install it?

Run $ npx -y mcp-app-attest 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. mcp-app-attest scores 50/100.