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The Auth Stack for your SaaS

Add SSO, SCIM, or MCP Auth as modular capabilities, or adopt Scalekit as your full identity layer for your SaaS app

The Auth Stack for your SaaS

Add auth to your B2B SaaS application without building from scratch.

Drop in a modular capability like MCP Auth, Single Sign-On, or SCIM alongside your existing system, or adopt Scalekit as your full identity layer for users, sessions, organizations, and roles.

Building auth from scratch? Start with SaaS User Management. Adding SSO, SCIM, or MCP Auth to an existing system? Use Modular Auth.

2 steps · ~5 minutes · works with any AI coding agent

Install the Scalekit Auth Stack
# options: full-stack-auth, agent-auth, mcp-auth, modular-sso, modular-scim
claude plugin marketplace add scalekit-inc/claude-code-authstack && claude plugin install full-stack-auth@scalekit-auth-stack

Now ask your agent to implement Scalekit auth in natural language. See example starting prompts →

Need help? Join the developer community or browse the guides.

Modular auth

Add specific auth capabilities like MCP Auth, SSO, or SCIM without replacing your existing system.

MCP Auth

Add OAuth 2.1 authorization to your remote MCP server with Dynamic Client Registration and short-lived tokens

Single Sign-On

Let enterprise users sign in through their company’s identity provider like Okta, Microsoft Entra, Google, and more

SCIM Provisioning

Automatically sync users, roles, and groups when IT admins add or remove people in Okta or Microsoft Entra

SaaS user management

Use Scalekit as your full identity layer to manage users, organizations, sessions, roles, and application access.

Quickstart

Get production-ready auth running in minutes

SaaS User Management

User lifecycle

Create, update, and delete users with built-in lifecycle APIs

Authentication methods

Support modern login flows with passkeys, magic links, OTPs, and social logins

B2B-native identity

Model organizations, user memberships, and multi-tenant access for B2B SaaS apps

Authorization

Define roles and permissions for human users and AI agents

Enterprise identity

Add enterprise capabilities like Single Sign-On (SSO) and SCIM provisioning

API & M2M auth

Issue and validate user-scoped and org-level tokens for APIs and services

Extensibility & Controls

Customize identity workflows and apply your business logic.

Webhooks

Receive real-time events for authentication, user lifecycle, and organizations

Interceptors

Apply custom logic and policy checks during authentication and authorization flows

Branding

Customize hosted login and signup pages plus auth emails to match your app

Auth logs

Record and inspect authentication events and user access activity for auditing purposes

Developer Resources

SDKs, code samples, and community resources for building with Scalekit.

SDKs

Drop-in libraries to quickly integrate Scalekit into your application

Code samples

Reference implementations and code examples for common auth flows

Developer community

Ask questions, share feedback, and learn from other Scalekit developers

Security, Compliance & Availability

Designed for production workloads with strict operational and security requirements.

⊕Multi-region data residency
Dedicated regional clusters in the US and EU

⊕Compliance
SOC 2, ISO 27001, GDPR, and CCPA compliant

⊕Uptime
99.99% uptime with failover redundancy

⊕Secure token & secret storage
Vault-backed storage with strong isolation for tokens and credentials

Compliance certifications