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Online Platforms with API

You can ask if an IP is related to suspicious/malicious activities. Completely free.


Check if the IP address is related to a bot that register accounts. It can also check usernames and emails. Initially free.


Find and verify emails. Some free API requests free, for more you need to pay. Commercial?
Find Malicious activities related to IPs and Domains. Free.


Find related personal data to a email (profiles on other platforms), domain (basic company info ,mails and people working) and companies (get company info from mail). You need to pay to access all the possibilities. Commercial?


Technologies used by webs. Expensive... Commercial?
Check if a host (domain or IP) is related with suspicious/malicious activities. Have some free API access. Commercial?
Check if a host (domain or IP) is related with suspicious/malicious activities. Have some free API access.


Indicates if host is related to spam activity. Have some free API access.


Based on opinions and other metrics get if a domain is related with suspicious/malicious information.


Obtains basic info from an IP address. You can test up to 100K/month.
This platform give information about domains and IP addresses like domains inside an IP or inside a domain server, domains owned by an email (find related domains), IP history of domains (find the host behind CloudFlare), all domains using a nameserver.... You have some free access.
Allows to search by email, domain or company name and retrieve "personal" information related. It can also verify emails. There is some free access.


A lot of information from domains and IPs even in the free/community version.
Search Domains, IPs and emails and get info from dumps. Have some free access.
Search by IP and gather information related to suspicions activities. There is some free access.


Search by IP or IP range and get information about IPs scanning the Internet. 15 days free access.


Get scan information of an IP address. Have some free api access.


Very similar to shodan
Find open S3 buckets searching by keyword.


Find leaked credentials of emails and even domains Commercial?


Search pastebins where a email appeared. Commercial?
Get reputation of a mail. Commercial?
Get passwords from leaked emails. Commercial?
Obtain interesting info from IPs
Search by domain and email and get if it was pwned and passwords. Commercial? a commercial tool?) (in a commercial tool?)