Auth0 API

Auth0 is enterprise-grade identity authentication platform (Okta subsidiary) — social / enterprise SSO / SAML / OIDC, MFA, rules engine, enterprise compliance audit.

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Use it when

10+ years enterprise auth experience (broadest SSO protocol support)

Watch for

Expensive (production tiers from thousands per month)

First check

Create tenant + application at auth0.com for domain + client_id. Universal Login: redirect to /authorize → user logs in → callback receives token.

Auth

jwt

CORS

HTTPS

Yes

Signup

Protocol

REST

Pricing

freemium

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About this API

Auth0 is a pioneering identity authentication service founded 2013 in Argentina, acquired by Okta (enterprise identity giant) in 2021 and integrated into Okta ecosystem. Auth0 is the veteran and de-facto standard in SaaS auth — 10+ years supporting enterprise's most complex auth scenarios (B2B SaaS customers using own ActiveDirectory via SAML, medical / finance customer HIPAA / SOC2 / GDPR compliance). Broadest feature scope: social login, enterprise SSO, SAML / OIDC / LDAP / WS-Federation all enterprise protocols, MFA, rules engine (custom JS auth flows), Anomaly Detection (IP / location / device risk assessment). vs. Clerk: Clerk modern UX + developer-friendly; Auth0 more enterprise features + deeper compliance + more expensive. Simple SaaS startup: Clerk. Enterprise / multi-IdP / heavy compliance: Auth0.

What you can build

1Enterprise SaaS B2B (customers use own IdP via SAML SSO)
2Multi-platform unified login (web + mobile + API)
3Complex auth rules (IP / location / device risk assessment)
4Compliance-heavy industries (HIPAA / SOC2 / GDPR)

Strengths & limitations

Strengths

10+ years enterprise auth experience (broadest SSO protocol support)
7000+ enterprise customer references
Full support for SAML / OIDC / LDAP enterprise standards
Rules engine for complex auth logic

Limitations

Expensive (production tiers from thousands per month)
UI / DX more dated than Clerk
Complex config (steep learning curve for advanced features)

Example request

Generic template — replace <endpoint> with the real path from the docs.

curl https://auth0.com/<endpoint> \
  -H "Authorization: Bearer $ACCESS_TOKEN"

Getting started

Create tenant + application at auth0.com for domain + client_id. Universal Login: redirect to /authorize → user logs in → callback receives token.

FAQ

Auth0 vs. Okta relationship?+

Okta acquired Auth0 in 2021; positioned as Okta for developers (Okta main brand for IT admins). Both products still independently maintained.

Is free tier suitable for production?+

Within 7000 MAU yes, but production apps usually need Essentials ($240/month) or higher.

Technical details

CORS: ?HTTPS: YesSignup: ?Open source: No

Auth type: jwt
Pricing: freemium
Rate limit: 默认 50 req/秒
Protocols: REST
SDKs: javascript, typescript, python, go, java, csharp, php, ruby