GreyNoise Community API
Threat Intel No key
Documentation: docs.greynoise.io ยท Checked Sep 13, 2026
About
GreyNoise runs sensors across the internet that watch mass scanning and opportunistic attacks, so it can tell you whether a suspicious IP is just background noise (a known scanner, search engine, or benign service) or something that has never been seen scanning. Which could mean it's targeting you specifically. The free Community API needs no key for basic use and returns a simple verdict: noise, riot (known benign service), or not seen. A free account raises your allowance.
Details
No key needed. You can call it right away.
Auth: No key
Rate limit: Community tier: about 50 lookups/week shared with the web visualizer for free accounts; unauthenticated use is more limited.
Verified: 2026-09-13
Best for: personal developer business
Setup
- No signup needed to try it: paste an IP onto the example URL in your browser.
- Read 'noise' (mass scanner), 'riot' (known benign service), and 'classification' fields.
- For more lookups, create a free account on the Visualizer and use your API key in the 'key' header.
- Treat 'not seen' results as potentially targeted. Investigate those first.
https://api.greynoise.io/v3/community/8.8.8.8Use cases
- Triage firewall alerts by filtering out known mass-scanners
- Check whether an IP probing your server is opportunistic or targeted
- Add context to incident-response reports with one API call