The Auth Stack for AI applications

Secure every layer of your app - MCP servers, APIs, users - in one scalable stack
Trusted by growing teams worldwide
Emil Sarkisi Stepanian
Founder, Hubbl
Easiest auth we found—free to start and had the best support among top competitors
Harsh Vakharia
CTO, SiftHub
We needed an auth solution that just works. Scalekit eliminated months of auth complexity
Gábor Szabad
Engineering Lead, Wise
The documentation was clear, practical, and easy to follow. It felt like we had a roadmap for every scenario.
Suman Varanasi
CTO, Fello
Scalekit made auth a breeze. We got secure, scalable auth and can open up modules as we see fit
Aditya Anand
CTO / Zenadmin
Scalekit let us focus on our core features, while still delivering secure, enterprise-ready auth
Himavanth J
CTO / Aerchain
Scalekit made it easy to launch modern login without changing our core system. Perfect integration and a great team!
Hari John Kurikose
Engineering, Unstract
Scalekit made it very easy for Unstract to integrate end-to-end auth in a matter of weeks.
Trusted by growing teams worldwide

Pick the auth modules you need today — scale into the rest as you grow.

Enable agentic access to your MCP servers

Add OAuth 2.1 and dynamic registration for secure agent access with full visibility.
Drop-in OAuth 2.1 for agent-to-MCP access
Dynamic client registration and PKCE built in
Manage scopes and permissions effortlessly
Built-in consent screens and access logs

Protect every API with OAuth tokens

Replace API keys with M2M tokens and delegated identity built for B2B integrations.
Secure M2M and user-scoped API access
Automatic token rotation and refresh
Built-in credential storage and audit logging
Standards-based OAuth for every service

Enterprise SSO and SCIM — without the engineering overhead

Unblock security reviews and fast-track enterprise onboarding.
SAML / OIDC–based SSO with 20+ IdPs
SCIM provisioning and deprovisioning
Self-serve admin portal for customers
Built-in IdP testing and configuration tools

User management designed for multi-tenant SaaS

Manage org hierarchies, user roles, and login routing through a B2B-native model.
Multi-tenancy with org-specific auth policies
User management with roles and permissions
Multiple auth methods: SSO, magic links, 2FA
Branded UI widgets for login andsignup pages

Enable agentic access to your MCP servers

Add OAuth 2.1 and dynamic registration for secure agent access with full visibility.
Drop-in OAuth 2.1 for agent-to-MCP access
Dynamic client registration and PKCE built in
Manage scopes and permissions effortlessly
Built-in consent screens and access logs

Protect every API with OAuth tokens

Replace API keys with M2M tokens and delegated identity built for B2B integrations.
Secure M2M and user-scoped API access
Automatic token rotation and refresh
Built-in credential storage and audit logging
Standards-based OAuth for every service

Enterprise SSO and SCIM — without the engineering overhead

Unblock security reviews and fast-track enterprise onboarding.
SAML / OIDC–based SSO with 20+ IdPs
SCIM provisioning and deprovisioning
Self-serve admin portal for customers
Built-in IdP testing and configuration tools

User management designed for multi-tenant SaaS

Manage org hierarchies, user roles, and login routing through a B2B-native model.
Multi-tenancy with org-specific auth policies
User management with roles and permissions
Multiple auth methods: SSO, magic links, 2FA
Branded UI widgets for login andsignup pages

Trusted by fast-moving 
CTOs and developers

Easiest auth we found—free to start and had the best support among top competitors
Emil Sarkisi Stepanian
Founder / Hubbl
We needed an auth solution that just works so we could focus on our core AI features. Scalekit eliminated months of auth complexity and let us ship in weeks
Harsh Vakharia
CTO / Sifthub
A great identity partner with top-notch developer experience. Scalekit's documentation is super thorough too!
Mac Gainor
CTO / Tiphaus
The simplest and most easiest auth to add to your app. Free to start, with the best support among major competitors
Vijay Gummadi
CEO / Autorox
Scalekit simplifies secure auth for any app. The team is knowledgeable and collaborative and tailor solutions to your needs
Gavin Barber
Software Engineer / TipHaus
Scalekit has been a game-changer for us. We now have a centralized platform to manage auth, saving dev time even users get a top-notch experience!
Avyakt G
Engineer/ Tortoise
Scalekit made auth implementation a breeze. We got secure, scalable  auth and can open up modules as we see fit
Suman Varanasi
Co-Founder & CEO, Fello
Great experience for developers who handle auth. Doesn't require a lot of integration effort as it sits comfortably with most tech stacks

Bhavin S
Founder / Recotap
Scalekit made it easy to launch modern login  without changing our core system. Perfect integration and a great team!
Himavanth J
CTO / Aerchain

Ship auth in under 30 minutes.

Edge cases aren’t an afterthought — they’re built in.
Add SSO, social, or magic link login flows with a few lines of code
Handle users, roles, and sessions in one integration
Works end-to-end or plugs into your existing auth stack with drop-in modules

const sendRes = await scalekit.passwordless. sendPasswordlessEmail(

  "user@example.com",{ magiclinkAuthUri: "https://yourapp.com/verify" }
);
await scalekit.passwordless.resendPasswordlessEmail(sendRes.authRequestId);
const verifyRes = await scalekit.passwordless. verifyPasswordlessEmail(
      { code: "123456"}, sendRes.authRequestId
);

const opts = { organizationId : 'org_123',connectionId:’conn_456’,loginHint:‘user@corp.com’ };
const authUrl = scalekit.getAuthorizationUrl('https://yourapp.com/auth/callback',opts);
// Redirect user to authUrl
// After login, handle callback with ?code=...
const {code} = req.query
const result = await scalekit. authenticateWithCode(code,
https =//yourapp.com/auth/callback');
const user = result.user;

curl = 'https://$SCALEKIT_ENVIRONMENT_URL/api/v1/users/{id}' \
  --request PATCH \
  --header 'Content-Type: application/json' \
  --data '{
    "external_id": "ext_12345a67b89c",
    "metadata": {"department": "engineering", "location": "nyc-office"},
    "user_profile": {
       "custom_attributes": {"department": "engineering", "security clearance": "level12"},
       "first_name": "John", "last_name":"Doe", "locale": "en-US",
       "metadata": {"account_status": "active", "signup_source": "mobile_app"},
       "name": "John Michael Doe", "phone_number":"+14155552671"
    }
)

const RESOURCE_ID = 'https://your-mcp-server.com';

const resource_metadata_endpoint = 'https://your-mcp-server.com/.well-known/oauth-protected-resource';

app.get('/.well-known/oauth-protected-resource', (req, res) => res.json({
  authorization_servers: ['https://your-app.scalekit.com/resources/xxx'],
    bearer_methods_supported: ['header'],
    resource: RESOURCE_ID
}));

app.use(async (req, res, next) => {
  const token = req.headers['authorization']?.split('Bearer')[1]?.trim();
    if (!token) return res.sendStatus(401);
    await scalekit.validateToken(token, { audience: [RESOURCE_ID] });
    next();
}));

Python
Ruby
Node-JS
Java
GO
REST
Python
Ruby
Node-JS
Java
GO
REST
Python
Ruby
Node-JS
Java
GO
REST

Launch with authentication that’s complete from day one

A platform engineered in full — built for flexibility, auditability, and every edge case.

Data protection, security, compliance — fully baked in

Encrypted
Bank-level data protection
AES-256 encryption secures data at rest and TLS 1.3 for data in transit. Client secrets are hashed using Bcrypt. Authorization codes and user PII are temporarily cached, never stored
Restricted
Restricted Access
Customer data is logically separated, with strict access controls ensuring data is restricted to the right account
Certified
Compliance
Scalekit is SOC 2, ISO 27001, GDPR and CCPA compliant. Detailed reports are available upon request for our extensive security pentests.
Highly Available
Always on, built for scale
With 99.99% uptime, high redundancy, and scalability, the platform is hosted across multiple geos and regions, ensuring low-latency and high throughput performance

Time to level up your auth stack!

Every feature unlocked. No hidden fees
Start Free
$0
/ month
1 million Monthly Active Users
100 Monthly Active Organizations
1 SSO and SCIM connection each
20K Tool Calls
10K Connected Accounts
Unlimited Dev & Prod environments