Okta App Catalog: Configure Pre-Built Integrations (2026)

Okta’s App Catalog is a treasure trove of pre-built integrations, but understanding how they actually work under the hood reveals a surprising amount about identity management.

Let’s see it in action with a common scenario: integrating Slack with Okta for Single Sign-On (SSO).

Imagine a user, Alice, trying to access Slack.

Alice navigates to Slack. Instead of a login form, Slack, configured for Okta SSO, redirects Alice’s browser to an Okta-hosted login page.
Okta authenticates Alice. This could be via her password, a security key, or even a push notification on her phone.
Okta generates a SAML assertion. This is a digitally signed XML document containing Alice’s identity information (username, email, group memberships, etc.).
Okta redirects Alice back to Slack. The SAML assertion is sent as a parameter in this redirect.
Slack validates the assertion. Slack’s integration with Okta verifies the digital signature of the assertion using a pre-shared public key from Okta. If valid, Slack trusts the identity information and logs Alice in automatically.

This entire flow, from Slack’s redirect to Slack logging Alice in, happens in seconds without Alice ever entering her Slack password.

The problem this solves is clear: reducing password sprawl and improving security. Instead of managing separate credentials for every application, users have one set of credentials managed by Okta. This single source of truth for identity simplifies user lifecycle management (onboarding, offboarding) and drastically reduces the attack surface associated with weak or reused passwords.

Internally, Okta acts as an Identity Provider (IdP), and the integrated application (like Slack) acts as a Service Provider (SP). The communication between the IdP and SP is standardized, most commonly using Security Assertion Markup Language (SAML) or OpenID Connect (OIDC).

SAML: This is an XML-based standard. When Alice logs into Okta, Okta asserts her identity to Slack. This assertion is a SAML response, signed by Okta, which Slack then consumes. This is the classic SSO flow.
OIDC: This is a modern, JSON-based protocol built on top of OAuth 2.0. It’s commonly used for mobile and web applications, often providing an id_token (a JWT) that contains user identity information.

The "pre-built integrations" in the Okta App Catalog aren’t magic. They are essentially pre-configured SAML or OIDC endpoints, metadata, and attribute mappings. When you add an application from the catalog, Okta populates these fields with the correct information for that specific application. You then provide Okta with the SP metadata (or vice-versa), and Okta handles the secure exchange.

The key levers you control are:

Attribute Mapping: This is crucial. Okta needs to tell the SP what information about the user to send. For Slack, this might be mapping Okta’s user.email attribute to Slack’s email attribute, and user.firstName/user.lastName to Slack’s first_name/last_name. Incorrect mapping is a common source of login failures.
Sign-on Method: You choose between SAML, OIDC, or sometimes other methods like SCIM for provisioning.
App Instance Settings: Each application instance might have unique settings required by the SP, such as a specific Entity ID or ACS URL, which you configure.

When you’re setting up an integration, Okta typically provides you with its IdP metadata URL (containing its public certificate and endpoints) and an IdP metadata XML file. You’ll upload this to the SP. Conversely, the SP will give you its SP metadata XML file or specific URLs (like the Assertion Consumer Service URL and Entity ID) that you’ll configure within Okta.

The "pre-built" aspect means Okta has already done the heavy lifting of figuring out what metadata and endpoints that specific application expects, and has templated the configuration. You’re essentially filling in the blanks and providing the necessary shared secrets (like the signing certificate).

A surprising aspect is how Okta can act as a proxy for user provisioning. Beyond just SSO, many catalog integrations support SCIM (System for Cross-domain Identity Management). This allows Okta to not only authenticate users but also to create, update, and deactivate user accounts directly within the target application. When you enable SCIM, Okta makes API calls to the application’s SCIM endpoint, synchronizing user attributes and lifecycle states. This means when a user is deactivated in Okta, their account can be automatically deprovisioned in Slack, Salesforce, or Workday, closing a significant security gap.

Once SSO is configured and working, the next common hurdle is managing user provisioning and deprovisioning efficiently.