Authentication
A curated index of services, tooling, and open source solutions for API authentication, authorization, identity management, and secrets management. This collection covers identity providers, SSO platforms, privileged access management, MFA, open source identity servers, and authentication standards including OAuth 2.0, OpenID Connect, SAML 2.0, FIDO2/WebAuthn, and SCIM.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Authentication the way a machine reads it — 15 machine-readable artifacts, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Authentication scores 2.5/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-10-03 · rubric v0.23.0
Put this on your own site. The badge is drawn live from Authentication's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/authentication/"
title="Authentication on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/authentication.svg"
alt="Authentication Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/authentication/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/authentication/"
title="Authentication on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/authentication/card.svg"
alt="Authentication Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Authentication
Each block below is one kind of artifact we hold for Authentication. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Features 6
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
OAuth 2.0 Protocol Coverage
Comprehensive coverage of OAuth 2.0 authorization framework implementations from cloud providers, open source projects, and commercial platforms.
OpenID Connect Providers
Index of OpenID Connect certified identity providers and implementations spanning cloud, on-premises, and self-hosted deployments.
Multi-Factor Authentication
Coverage of MFA solutions including TOTP, SMS, push notification, WebAuthn/FIDO2, and hardware token implementations.
Self-Hosted Identity Solutions
Open source identity servers that can be self-hosted including Keycloak, Authelia, Authentik, Zitadel, and Casdoor.
Enterprise Identity Providers
Commercial enterprise IAM platforms including Okta, Auth0, ForgeRock, Ping Identity, and Microsoft Entra ID.
Secrets and PAM
Privileged access management and secrets management tools including HashiCorp Vault and CyberArk for secure credential storage.
Use Cases 4
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Identity Provider Selection
Compare authentication platforms across self-hosted, cloud, and enterprise tiers to select the right identity provider.
SSO Implementation
Find SSO platforms and libraries for implementing single sign-on across applications and services.
API Security Research
Research authentication standards, security patterns, and best practices for securing REST, GraphQL, and gRPC APIs.
Zero Trust Architecture
Discover identity verification services for zero trust network access and continuous authentication architectures.
Integrations 5
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
OAuth 2.0 Standard
The foundational authorization framework implemented by every provider in this collection.
OpenID Connect Standard
Identity layer on top of OAuth 2.0 providing standardized user info, ID tokens, and discovery endpoints.
SAML 2.0 Standard
XML-based authentication standard widely used for enterprise SSO and federation scenarios.
SCIM 2.0 Standard
System for Cross-domain Identity Management for automated user provisioning and deprovisioning.
FIDO2/WebAuthn Standard
Web Authentication standard for passwordless and hardware-backed authentication.
← All providers · Data indexed from github.com/api-evangelist/authentication · machine-readable index on apis.io
This is an independent, third-party profile of Authentication, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.