Workos

REST API at api.workos.com. SSO: GET /sso/authorize initiates SAML/OIDC flow, POST /sso/token exchanges code for profile. Directory Sync: GET /directories lists connected directories, GET /directory_users lists synced users, webhooks deliver user/group change events. AuthKit: GET /user_management/authorize initiates auth, POST /user_management/authenticate completes it. The SSO flow abstracts SAML complexity — agents handle OAuth-style redirects regardless of whether the underlying protocol is SAML or OIDC. Organization management: POST /organizations creates customer organizations, each with their own SSO/directory connections. The Admin Portal is launched via a portal link for customer self-service. Events API provides audit log functionality. The API design successfully abstracts enterprise identity complexity behind familiar OAuth patterns.

API errors return JSON with code, message, and errors array. Standard HTTP status codes. SSO errors include identity provider-specific messages (SAML response errors, OIDC token failures) with guidance. The main reliability consideration: SSO involves third-party identity providers (Okta, Azure AD, etc.) — IdP outages affect SSO availability. WorkOS abstracts IdP differences but can't prevent IdP downtime. Directory sync webhook delivery retries on failure. Webhook events are ordered and idempotent. Rate limits are generous. For agents, implementing SSO fallback (allow password login when SSO is unavailable) is recommended. The Admin Portal handles most SSO configuration errors at the customer's self-service level — reducing agent/support involvement.

WorkOS provides enterprise authentication features that B2B SaaS products need to sell to enterprise customers: SSO (SAML 2.0 and OIDC), directory sync (SCIM), and audit logs. For agents building B2B products, WorkOS adds enterprise readiness without building SSO/SCIM from scratch. The Admin Portal enables end customers to self-configure their SSO connections — reducing support burden. AuthKit combines SSO with social login, email/password, and MFA in a unified authentication experience. Directory sync keeps user directories in sync with identity providers (Okta, Azure AD, OneLogin, etc.). For agents, the key value is time-to-enterprise: adding SSO and directory sync to a product in days rather than months. The API is developer-focused with clean design.

API key authentication via Authorization: Bearer header. Keys are per-environment (staging, production). Client ID for SSO/AuthKit redirect flows. The API key grants management access to the WorkOS dashboard's API surface. No fine-grained key scoping. Environment separation prevents staging SSO configurations from affecting production. Webhook signatures use HMAC for payload verification. For agents, the API key + client ID model is standard for OAuth/SSO infrastructure providers. The Admin Portal generates time-limited portal links for customer access — these don't require WorkOS API keys. The security model appropriately protects the management API while enabling customer self-service for SSO configuration.

Documentation at workos.com/docs is excellent — well-organized with quickstart guides, API reference, and integration guides. The SSO documentation walks through the complete flow with sequence diagrams. Identity provider-specific guides cover Okta, Azure AD, Google Workspace, OneLogin, and others. Directory sync documentation explains webhook event handling. SDKs for Node.js, Python, Ruby, Go, PHP, Java, and .NET are official and maintained. The documentation's strength: it explains enterprise identity concepts (SAML, SCIM, IdP-initiated SSO) in developer-friendly terms. The Admin Portal documentation covers customer-facing configuration flows. For agents, the SSO quickstart guide is the essential starting point — it demonstrates the complete integration in one tutorial.