Top 45 Security APIs For Developers

Android library and API to verify the safety of user devices, detect rooted devices and other risks.

Cryptographic proof API for HTTP exchanges — Ed25519, RFC 3161, and Sigstore Rekor attestation.

Provide access to BinaryEdge 40fy scanning platform.

Best open-source password manager.

Botd is a browser library for JavaScript bot detection.

Bugcrowd API for interacting and tracking the reported issues programmatically.

Search engine for Internet connected host and devices.

Encrypting & decrypting text messages.

Security-first search engine API for AI agent skills with Trust Score.

Provides data of offenders from all U.S. States and Puerto Rico.

Free no-auth JSON feed of exploited CVEs with CVSS, EPSS and CISA KEV status.

Domain, DNS, WHOIS/RDAP, TLS, email, brand and web intelligence.

Email address threat and risk prediction.

An API for escaping different kind of queries.

Lists of filters for adblockers and firewalls.

Fraud detection API offering highly accurate browser fingerprinting.

Screen order information using AI to detect frauds.

Searchable attack surface database of the entire internet.

Scan files for secrets (API Keys, database credentials).

Query IPs in the GreyNoise dataset and retrieve a subset of the full IP context data.

The industry’s first hacker API that helps increase productivity towards creative bug bounty hunting.

Passwords which have previously been exposed in data breaches.

Perform OSINT via Intelligence X.

Bot detection and fraud prevention API with IP reputation and email validation.

Find leaked or exposed credentials by email, username, phone, domain, hash, or breach origin.

Managed User Authentication Service.

Programmatic interfaces to engage with the Microsoft Security Response Center (MSRC).

Mozilla observatory http scanner.

Mozilla observatory tls scanner.