API archive entry · source-reported
Tanod
Pay-per-call scans of smart contracts, addresses and MCP/skill packages; small free daily tier
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.
Agent Verifier
Self-check for AI agents: verifies Web Bot Auth signatures and shows how a request looks
No auth · HTTPS reported · CORS No
Blooms
Distribute keys once for serverless applications
No auth · HTTPS reported · CORS No
Escape
An API for escaping different kind of queries
No auth · HTTPS reported · CORS No
OSV
Open source vulnerability database and distributed triage infrastructure
No auth · HTTPS reported · CORS Yes
VPNDetection
Check whether an IPv4 or IPv6 address belongs to VPN infrastructure, no key needed
No auth · HTTPS reported · CORS Yes
IPGuardian
Check IP addresses against 140+ public threat intelligence blocklists
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.