~/CLIRank

Best Security APIs for AI Agents in 2026

Breach detection, threat intelligence, and dependency scanning APIs. Protect your users and your code. Below: the top 3 Security APIs by CLIRank score, the independent rubric for how well an API actually works with AI coding agents like Claude Code and Cursor.

1
Have I Been Pwned API/10Breach Detection

Check if email or password has been in a data breach.

Best for: Gold standard for checking email/password breaches

CLI relevance
5
Quality
3
check breached emailscheck breached passwordsget breach data
2
VirusTotal API/10Threat Intelligence

Scan files, URLs, and domains for malware and threats.

Best for: Scan files and URLs against 70+ antivirus engines

CLI relevance
5
Quality
3
scan files for malwarescan urlsget threat intelligence
3
Snyk API/10Dependency Scanning

Find and fix vulnerabilities in code, dependencies, and containers.

Best for: Best developer-focused security scanning for dependencies

CLI relevance
7
Quality
4
scan dependencies for vulnerabilitiesget vulnerability datamanage projects

Frequently asked questions

What makes an Security API "agent-friendly"?

For AI coding agents, the highest-impact signals are: an official SDK on npm or PyPI, environment variable authentication (no browser OAuth flow), JSON responses that parse cleanly, machine-readable pricing, and reasonable rate limits for scripted use. APIs missing more than two of these are painful for agents to use reliably.

How do you score Security APIs?

Each API is rated on 8 signals worth 1-2 points each (11 raw, normalised to 10). The full rubric: official SDK (+2), env var auth (+2), headless compatible (+2), CLI tool (+1), JSON response (+1), curl/CLI docs examples (+1), reasonable rate limits (+1), machine-readable pricing (+1). The top-scoring API in this category right now is Have I Been Pwned API at null/10.

Why isn't [my favourite API] on this list?

This list shows the top 3 Security APIs by score. The full ranking includes 3 APIs in this category. If yours is missing entirely, submit it at clirank.dev/submit - it gets auto-scored and added if it clears the threshold.

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