Blooms
Security
Distribute keys once for serverless applications
No keyCORSHTTPS
GreyNoise
Query IPs in the GreyNoise dataset and retrieve a subset of the full IP context data
Checked 4 days ago: not responding
API key
Required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Failing · 0/100
What our checks found
- Health score
- 0/100
- Reliability
- 0%
- Average latency
- 19509ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for GreyNoise. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Requires an API key. Check the docs for whether it goes in a header or a query parameter.
curl -s "https://docs.greynoise.io/ENDPOINT" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from one public source (public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
Other Security APIs
See all 71 →dead-drop
Security
Ephemeral zero-knowledge encrypted data sharing
No keyCORSHTTPS
Microsoft Security Response Center (MSRC)
Security
Programmatic interfaces to engage with the Microsoft Security Response Center (MSRC)
No keyCORSHTTPS
National Vulnerability Database
Security
U.S. National Vulnerability Database
No keyCORSHTTPS
Presend
Security
Security and developer utility API -- malware, vulnerability, and domain checks, no signup
No keyCORSHTTPS
FishFish
Security
FishFish is an automated service designed to quickly detect and mitigate phishing threats before they can be exploited for malicious purposes. It provides a streamlined solution for identifying harmful resources efficiently.
No keyCORSHTTPS
GreyNoise — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is GreyNoise free to use?
GreyNoise is listed in our free catalogue, but it requires an API key, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does GreyNoise need an API key?
Yes. GreyNoise authenticates with an API key. Keep it server-side rather than in browser code, because anything in your frontend bundle is readable by anyone who opens developer tools.
Can I call GreyNoise from browser JavaScript?
Not directly. GreyNoise did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is GreyNoise still working?
Not at our last check on 2026-09-18. GreyNoise did not respond successfully, which is why it is marked as down here. This may be temporary; we re-check on a schedule and the badge above reflects the most recent run.
Is GreyNoise available over HTTPS?
Yes. GreyNoise serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.