OSV
Open source vulnerability database and distributed triage infrastructure
Security · No auth · HTTPS
Security APIs
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Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
VPNDetection
Check whether an IPv4 or IPv6 address belongs to VPN infrastructure, no key needed
Security · No auth · HTTPS
IPGuardian
Check IP addresses against 140+ public threat intelligence blocklists
Security · No auth · HTTPS
CVE.report
CVE records with NVD KEV and EPSS enrichment
Security · No auth · HTTPS
Portscan
Scans the requesting client's IP for open TCP ports with fast or deep modes on IPv4/IPv6
Security · No auth · HTTPS
Classify
Encrypting & decrypting text messages
Security · No auth · HTTPS
CSR.plus
Generate certificate signing requests and private keys without OpenSSL
Security · No auth · HTTPS
dead-drop
Ephemeral zero-knowledge encrypted data sharing
Security · No auth · HTTPS
Hashable
A REST API to access high level cryptographic functions and methods
Security · No auth · HTTPS
IPLogs
Free VPN, proxy, Tor and datacenter IP detection. 13 sources, active probing
Security · No auth · HTTPS
Passwordinator
Generate random passwords of varying complexities
Security · No auth · HTTPS
Presend
Security and developer utility API -- malware, vulnerability, and domain checks, no signup
Security · No auth · HTTPS
Virushee
Virushee file/data scanning
Security · No auth · HTTPS
IPScanner
IP network class (residential, mobile, hosting, VPN, residential proxy, Tor) with a confidence score
Security · API key · HTTPS
Maskbreak
Detect VPNs, proxies, Tor, bots and antidetect browsers at signup, login and checkout
Security · API key · HTTPS
Sealed Rose
AI media forensics and synthetic content verification for video, audio, image, and text
Security · API key · HTTPS
ClassiFinder
Detect leaked secrets and prompt-injection in text and return redacted output
Security · API key · HTTPS
Kiprio SSL Inspector
TLS certificate analysis with protocol matrix, cipher suite and HSTS grading
Security · API key · HTTPS
CompliAPI
Screen crypto addresses, emails, websites, IDs and countries against OFAC, EU, UK sanctions lists
Security · API key · HTTPS
Application Environment Verification
Android library and API to verify the safety of user devices, detect rooted devices and other risks
Security · API key · HTTPS
BinaryEdge
Provide access to BinaryEdge 40fy scanning platform
Security · API key · HTTPS
Botd
Botd is a browser library for JavaScript bot detection
Security · API key · HTTPS
Complete Criminal Checks
Provides data of offenders from all U.S. States and Pureto Rico
Security · API key · HTTPS
FingerprintJS Pro
Fraud detection API offering highly accurate browser fingerprinting
Security · API key · HTTPS