The State of Auth in AI apps: 2025
Read report

The Auth Stack for AI applications

Secure every interface of your product - SaaS app, MCP server, human users, AI agents & orgs
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
Product and Solutions, 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

Identity flows in and out of your app

Inbound: MCP clients and users accessing your MCP servers & SaaS apps
Outbound: Your AI agents connecting to external tools on behalf of users

Add only the auth modules you need - no changes to your current setup

Drop-in OAuth for your 
MCP servers

Enable LLM clients like ChatGPT and Claude to securely access  your MCP servers
Dynamic Client Registration (DCR) & PKCE flows
Supports Client ID Metadata Documents (CIMD)
Manage scopes and permissions for tools
Built-in consent screens and access logs

Delegated access for your AI agents

Let your users grant OAuth access for your agents to securely  access external tools
User-approved OAuth consent for agent access
Token vault with scoped retrieval permissions
Auto-refreshed, short-lived tokens with rotation policies
Auth logs for token activity and external tool access

Enterprise SSO — without the engineering overhead

Add SAML/OIDC SSO alongside your current auth system
SAML & OIDC SSO across 20+ enterprise IdPs
Self-serve SSO setup via the admin portal
Automatic certificate rotation & expiry detection
Built-in IdP testing & configuration tools

SCIM user provisioning - automate joiners & leavers

Sync users, groups, and roles from enterprise directories
Automated user provisioning & deprovisioning
Role updates & group assignments taken care of
Support for custom roles & custom user attributes
Real-time webhooks, plus batch syncs for reconciliation

Drop-in OAuth for your 
MCP servers

Enable LLM clients like ChatGPT and Claude to securely access  your MCP servers
Dynamic Client Registration (DCR) & PKCE flows
Supports Client ID Metadata Documents (CIMD)
Manage scopes and permissions for tools
Built-in consent screens and access logs

Delegated access for your AI agents

Let your users grant OAuth access for your agents to securely  access external tools
User-approved OAuth consent for agent access
Token vault with scoped retrieval permissions
Auto-refreshed, short-lived tokens with rotation policies
Auth logs for token activity and external tool access

Enterprise SSO — without the engineering overhead

Add SAML/OIDC SSO alongside your current auth system
SAML & OIDC SSO across 20+ enterprise IdPs
Self-serve SSO setup via the admin portal
Automatic certificate rotation & expiry detection
Built-in IdP testing & configuration tools

SCIM user provisioning - automate joiners & leavers

Sync users, groups, and roles from enterprise directories
Automated user provisioning & deprovisioning
Role updates & group assignments taken care of
Support for custom roles & custom user attributes
Real-time webhooks, plus batch syncs for reconciliation
Or go all-in with the full platform

Adopt Scalekit as your full-stack identity layer

Everything you need in a full identity system

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

SDKs for every stack, with ready-to-run examples for each flow
Python
GO
Node-JS
Java
Ruby
REST
Python
GO
Node-JS
Java
Ruby
REST
Python
GO
Node-JS
Java
Ruby
REST

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: bearer_methods_supported
    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();
);

# Create a connected account for user if it doesn't exist already
response = actions.get_or_create_connected_account(
    connection_name: "gmail",
    identifier: "user_123" #unique identifier for your connected account. can be replaced with your system's user ID
);
connected_account = response.connected_account
print (f'Connected account created =  {connected_account.id}')

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;

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 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();
}));

A complete dev toolkit for production-ready auth

Webhooks for extensibility, logs for auditing, and interceptors for customization

Security, compliance, and uptime - built for enterprise scale

Certified
Enterprise-grade 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
Token Vault
Secure token & secret storage
Tokens and secrets are stored in an isolated, encrypted vault with strict access controls. Scalekit enforces scoped access, automatic rotation, and full auditability to protect sensitive credentials at all times
Multi-Region
Multi-region data residency
Scalekit offers dedicated clusters in Frankfurt (EU) and Los Angeles (NA), ensuring low latency, strict data boundaries, and region-specific encryption
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
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
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
Multi-Region
Multi-region data residency
Scalekit offers dedicated clusters in Frankfurt (EU) and Los Angeles (NA), ensuring low latency, strict data boundaries, and region-specific encryption.

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 connection
1 SCIM connection
10K Connected Accounts
Unlimited Dev & Prod environments