AlienVault Open Threat Exchange (OTX) vs NoPhishy

Open Threat Exchange is AT&T Cybersecurity's community threat-intelligence platform, now operated under the LevelBlue brand, where contributors publish "pulses" of malicious IPs, domains, hashes, and URLs that anyone can query. A live, unauthenticated GET against its IPv4 general-info endpoint returned a full 200 JSON response, and both that call and its OPTIONS preflight echoed the request's Origin in Access-Control-Allow-Origin, resolving cors to yes; an OTX-API-KEY is still needed for higher rate limits and pulse subscriptions. Signup, the API key, and the community feed itself are all free.

NoPhishy (listed on RapidAPI as Exerra Phishing Check) queries a maintained database of 299,000+ known phishing domains, refreshed roughly every two hours, to flag whether a submitted URL or domain is a known phishing attempt. A live GET through the real RapidAPI gateway host with an invalid x-rapidapi-key returned a 403 rejection rather than a network-level block, reconfirming API-key auth over HTTPS, and Access-Control-Allow-Origin echoed the request's Origin on that same call. Like other RapidAPI-distributed APIs it offers a free Basic plan alongside paid tiers for higher request volumes.