MarketNow Registry / Developer Tools / MCP Everything Server (Official Test Reference)

MCP Everything Server (Official Test Reference)

Official Anthropic MCP test reference server. Exercises all MCP features for testing client implementations. Reference implementation by the MCP team.

Developer Tools v1.0.0 by Anthropic (modelcontextprotocol)

Trust score

48/100

Install risk

Runs registry code

Source

github

Indexed

2026-09-10

Install

$ npx -y @modelcontextprotocol/server-everything

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 MCP Everything Server (Official Test Reference)?

Official Anthropic MCP test reference server. Exercises all MCP features for testing client implementations. Reference implementation by the MCP team. Indexed by MarketNow with trust 48/100 (Runs registry code).

How do I install it?

Run $ npx -y @modelcontextprotocol/server-everything 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 Everything Server (Official Test Reference) scores 48/100.