Authentication
Authentication is one of the API Evangelist areas on the APIs.io network — a focused corner of the API landscape. The full area lives at authentication.apievangelist.com.
30 providers on the network work in this area, including Twilio, Microsoft Entra ID (formerly Azure AD), Kinde, Zoho CRM, Appwrite, Kit, and 24 more — each links out to that provider’s APIs, schemas, and governance artifacts.
Related areas: AI Automation, Agents, Communications, and Agent Skills. Browse every area at areas.apis.io.
About this area
A curated index of services, tooling, and open source solutions for API authentication, authorization, identity management, and secrets management. This collection covers identity…
Related providers (423)
Top 30 of 423 network providers tagged for this area — search the full set on apis.io.
| Provider | Description | APIs | Rating |
|---|---|---|---|
| Twilio | Cloud communications platform providing APIs for SMS, voice, video, and authentication services. Twilio offers 30+ APIs covering messaging, voice, video, email, identity verific... | 55 | exemplar |
| Microsoft Entra ID (formerly Azure AD) | Microsoft's cloud-based identity and access management service that helps employees sign in and access resources. Azure AD provides OAuth, OpenID Connect, SAML, and other identi... | 9 | exemplar |
| Kinde | Kinde is a developer-first authentication and customer identity platform that bundles authentication (passwords, passwordless, social, enterprise SSO), authorization (roles, per... | 2 | exemplar |
| Zoho CRM | Zoho CRM is Zoho Corporation's AI-powered sales and customer relationship management platform, used to manage leads, contacts, accounts, deals, activities and customer engagemen... | 105 | exemplar |
| Appwrite | Appwrite is an open-source backend platform for web, mobile and AI applications, shipped both as a self-hostable BSD-3-Clause server and as the managed Appwrite Cloud. One REST ... | 2 | exemplar |
| Kit | Kit (formerly ConvertKit) is a creator email marketing platform whose REST API v4 covers subscribers, tags, custom fields, forms and landing pages, sequences, broadcasts, snippe... | 2 | exemplar |
| drchrono | drchrono, part of EverCommerce's EverHealth portfolio, is an all-in-one EHR, practice management and medical billing platform for independent US medical practices. It publishes ... | 2 | exemplar |
| Okta | Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Identity Platform) covers Single Sign-On, Adaptive MFA, Universal Director... | 2 | exemplar |
| Telesign | Telesign provides a comprehensive suite of communications and security APIs enabling businesses to verify phone numbers, send SMS, omnichannel and voice messages, and assess fra... | 28 | exemplar |
| Cvent Registration | Cvent Registration is the event registration product within the Cvent Event Cloud, providing online registration websites, attendee data capture, payment processing, registratio... | 2 | exemplar |
| Cvent | Cvent is a leading meetings, events, and hospitality technology provider with over 4,800 employees and 22,000+ customers worldwide. The Cvent platform spans Event Cloud (event m... | 2 | exemplar |
| Aembit | Aembit is a Workload Identity and Access Management (Workload IAM) platform for non-human identities — AI agents, applications, microservices, CI/CD pipelines, scripts and servi... | 2 | exemplar |
| Authentik | Authentik is an open source identity provider from Authentik Security Inc., a public benefit company, exposing a 1,193-operation REST API at /api/v3 on every self-hosted instanc... | 1 | exemplar |
| Strivacity | Strivacity is a customer identity and access management (CIAM) vendor that runs a single-tenant, dedicated-cloud identity platform for consumer, partner, B2B and — since its Age... | 8 | exemplar |
| Tvarka ATK API | A single REST API estate for Lithuanian eID authentication and qualified electronic signing (QES). The ATK API reads the Lithuanian identity card itself - physical smart-card re... | 4 | exemplar |
| Microsoft Entra | Microsoft Entra (formerly Azure Active Directory) is Microsoft's family of identity and network access products, providing authentication, authorization, directory, identity gov... | 1 | exemplar |
| Hootsuite | Hootsuite is a social media management platform that lets organizations schedule posts, monitor conversations, run paid campaigns, and analyze performance across LinkedIn, X (Tw... | 8 | exemplar |
| AWeber | AWeber is an email marketing and automation platform for small businesses, creators, and entrepreneurs providing email broadcasts, drip campaigns, landing pages, sign-up forms, ... | 5 | exemplar |
| Clerk | Clerk is a complete user management and authentication infrastructure platform offering embeddable UI components, flexible APIs, and admin dashboards. It provides full-stack aut... | 8 | exemplar |
| Auth0 | Auth0 (now part of Okta) is a leading identity-as-a-service platform providing authentication and authorization for applications, APIs, and AI agents. It implements OpenID Conne... | 4 | exemplar |
| Zuplo | Zuplo is the API management platform for developers. Build, deploy, and scale APIs faster with Zuplo. | 1 | exemplar |
| Immutable | Immutable is a games growth and blockchain infrastructure company whose platform spans two connected halves: Immutable Audience, a games-focused CDP, attribution and player-acti... | 2 | exemplar |
| Cvent Event Cloud | Cvent Event Cloud is the event management product line of the Cvent Platform. It supports the full event lifecycle: event creation, registration, marketing, agenda and session m... | 2 | exemplar |
| Lacuna | Lacuna (lacuna.fm), operated by JOYLINK LTD, is an AI music creation platform that turns lyrics or a plain-text style description into complete songs with vocals, alongside lyri... | 2 | exemplar |
| Cisco XDR | Cisco XDR is Cisco's extended detection and response platform, the successor to SecureX. It correlates telemetry from Cisco Secure Endpoint, Secure Firewall, Umbrella, Duo, Secu... | 12 | exemplar |
| Taskfolk | Taskfolk is a project-management and issue-tracking platform built for teams and their AI agents working side by side, operated by UTTER L.L.C-FZ of Dubai, UAE. Workspaces conta... | 2 | exemplar |
| Rose Rocket | Rose Rocket is a Toronto-based transportation management system (TMS) for freight brokers, carriers and 3PLs, sold as an AI-native, configurable operations platform rather than ... | 1 | exemplar |
| Microsoft Active Directory | Microsoft Active Directory and Microsoft Entra ID provide identity and access management for organizations of all sizes. Microsoft Graph API is the unified REST API gateway for ... | 3 | exemplar |
| Amazon Cognito | Amazon Cognito is a fully managed AWS user identity and authentication service that adds sign-up, sign-in, and access control to web and mobile applications, scaling to millions... | 2 | exemplar |
| Beeketing | Beeketing began as a Vietnam-founded e-commerce marketing startup (backed by 500 Global) that built conversion-optimization apps for Shopify and other online stores, and evolved... | 1 | exemplar |
Related areas
Markets provisional
Kin Score markets whose measured providers carry this area. Share is the fraction of the market's measured providers that carry it — it describes the market, not this area.
| Market | Share of the market's providers |
|---|---|
| Identity and Auth | 100% |
| Legal and E-Signature | 12% |
| Security (EDR, SIEM, SOAR) | 12% |
| US Open Banking (FDX) | 12% |
Cohort brief
Auto-generatedThe 30 providers in the APIs.io catalog working in Authentication, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Access Clarity | 87.1 | 25 | +62.1 | 30 |
| Operational Transparency | 73.9 | 12.4 | +61.5 | 30 |
| Developer Ergonomics | 72.6 | 22.1 | +50.5 | 30 |
| Contract Quality | 66.6 | 18.2 | +48.4 | 30 |
| Contract Governance | 33.5 | 9.4 | +24.1 | 30 |
| Discoverability | 74.8 | 57.9 | +16.9 | 30 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 70% | 16% | +54 |
| MCP server (first-party) | 63% | 14% | +49 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 77% | 13% | +64 |
| Security | 100% | 98% | +2 |
| Arazzo workflows | 37% | 2% | +35 |
| Governance rules | 100% | 35% | +65 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
- 1 Twilio 90.3
- 2 Microsoft Entra ID (formerly Azure AD) 89
- 3 Kinde 88.8
- 4 Zoho CRM 86
- 5 Appwrite 84.6
- 6 Kit 79.6
- 7 drchrono 79.5
- 8 Okta 78
- 9 Telesign 76.9
- 10 Cvent Registration 76.7
Work with this as data
Every area here is available over the APIs.io API and to AI agents over MCP.