API archive entry · source-reported
GetOTP
Implement OTP flow quickly
Other Authentication & Authorization 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.
Micro User Service
User management and authentication
API key · HTTPS reported · CORS No
Stytch
User infrastructure for modern applications
API key · HTTPS reported · CORS No
Auth0
Easy to implement, adaptable authentication and authorization platform
API key · HTTPS reported · CORS Yes
MojoAuth
Secure and modern passwordless authentication platform
API key · HTTPS reported · CORS Yes
SAWO Labs
Simplify login and improve user experience by integrating passwordless authentication in your app
API key · HTTPS reported · CORS Yes
Warrant
APIs for authorization and access control
API key · HTTPS reported · CORS Yes
How to compare them
Coverage
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Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
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Source reference
This page separates source-reported facts from questions that need live provider verification.