API archive entry · source-reported
VPNDetection
Check whether an IPv4 or IPv6 address belongs to VPN infrastructure, no key needed
Other Security APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
IPGuardian
Check IP addresses against 140+ public threat intelligence blocklists
No auth · HTTPS reported · CORS Yes
CVE.report
CVE records with NVD KEV and EPSS enrichment
No auth · HTTPS reported · CORS Yes
Portscan
Scans the requesting client's IP for open TCP ports with fast or deep modes on IPv4/IPv6
No auth · HTTPS reported · CORS Yes
Classify
Encrypting & decrypting text messages
No auth · HTTPS reported · CORS Yes
CSR.plus
Generate certificate signing requests and private keys without OpenSSL
No auth · HTTPS reported · CORS Yes
dead-drop
Ephemeral zero-knowledge encrypted data sharing
No auth · HTTPS reported · CORS Yes
How to compare them
Coverage
Compare exact endpoints, fields, geography, history, and update frequency.
Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
Review attribution, redistribution, retention, privacy, and commercial-use terms.
Source reference
This page separates source-reported facts from questions that need live provider verification.