AbuseIPDB vs MalwareBazaar

AbuseIPDB is a crowdsourced IP, domain, and URL reputation database where network operators report malicious activity like brute-force attempts, spam, and port scans. A live GET against the real gateway, api.abuseipdb.com/api/v2/check, returned a 401 with an invalid key rather than a CORS-enabled response, reconfirming API-key auth over HTTPS and resolving cors to no. A free Individual tier allows 1,000 checks a day forever with no card required, while paid Basic/Premium/Enterprise plans raise the daily ceiling for high-volume users.

MalwareBazaar, part of the abuse.ch threat-intel suite, is a community platform for submitting, tagging, and bulk-downloading real malware samples by hash, signature family, or YARA rule via its JSON API. A live POST to the real mb-api.abuse.ch host without an Auth-Key was rejected, and a bogus key returned {"query_status": "unknown_auth_key"}, confirming abuse.ch's mandatory Auth-Key authentication over HTTPS with no Access-Control-Allow-Origin header on either response. Use is free under abuse.ch's fair-use policy, with a separate paid commercial API tier for organizations needing higher volume or an SLA.