Greynoise MCP server

by nickjlucker·io.github.nickjlucker/greynoise·v0.1.0

MCP server for GreyNoise API - Check if IPs are internet background noise or targeted attacks

C66/100grade C

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Safety scan

C66/100

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If you have run it, two minutes of your experience saves the next person an afternoon.

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

check_ip
Check if an IP address is internet background noise or potentially targeted activity.
check_ips
Check multiple IP addresses against GreyNoise in one call.

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

no findings

Code scan3 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitystatic API keys via environment variables6/15
Maintenancelast push 214 days ago4/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 66/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Runs npx -y mcp-greynoise on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add greynoise -- npx -y mcp-greynoise

Is Greynoise MCP server safe?: With care: it is graded C, so read the findings first (66/100). Read the Greynoise safety report
How do I install Greynoise?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Greynoise need an API key?: Yes. The registry entry asks for GREYNOISE_API_KEY.
Is Greynoise maintained?: The last commit was 229 days ago (2026-02-26). The latest release is v0.1.0.