> ## Documentation Index > Fetch the complete documentation index at: https://docs.orbit.devotel.io/llms.txt > Use this file to discover all available pages before exploring further. # Consume the SAML assertion (ACS) > SAML 2.0 Assertion Consumer Service. The identity provider POSTs a signed `SAMLResponse` here after the user authenticates; Orbit verifies the signature, audience and replay window, provisions a user on first login, then 302-redirects the browser to the dashboard sign-in ticket so the session cookie can be minted. This endpoint is called by the IdP, not directly by your application. ## OpenAPI ````yaml /openapi.yaml post /auth/saml/{orgSlug}/callback openapi: 3.1.0 info: title: Devotel CPaaS API description: Orbit by Devotel — Communications Platform as a Service API version: 1.0.0 contact: name: Devotel url: https://devotel.io email: support@devotel.io license: name: Proprietary servers: - url: https://api.orbit.devotel.io description: Production security: - Bearer: [] - ApiKey: [] tags: - name: Messages description: >- Send and manage messages across all channels (SMS, WhatsApp, RCS, Email, Viber, etc.) - name: Fax description: >- List and track fax (MMS/T.38) transmissions on Telnyx-backed fax numbers (sending flows through the Messaging API) - name: Agents description: AI agent creation, configuration, and execution - name: Voice description: Voice calls, IVR, conferencing, and SIP trunking - name: OnCall description: On-call rotations and escalation policy planning for incident alerting - name: Webhooks description: Webhook endpoint management and delivery logs - name: Numbers description: Phone number search, provisioning, and configuration - name: Brand Identity description: >- Unified cross-channel brand trust posture (10DLC, toll-free, WhatsApp, RCS, branded calling, number KYC) - name: Contacts description: Contact management, segmentation, and lifecycle tracking - name: Campaigns description: Marketing campaign orchestration and analytics - name: Flows description: Automation flow builder and execution engine - name: Templates description: Message template management and approval workflows - name: Settings description: Organization, channel, and user preference settings - name: Verify description: OTP generation and verification across channels - name: Push description: Push notification delivery via FCM and APNs - name: Integrations description: Third-party service connections and OAuth management - name: CDP description: >- Customer Data Platform — activation surface (CRM object sync, streaming destinations, ad-audience activation) - name: Files description: >- Server-to-server media upload, listing, retrieval, and deletion (signed-URL backed) - name: Commerce description: >- Omnichannel conversational-commerce — persistent cart + checkout state machine, channel-agnostic hosted pay-by-link, native WhatsApp checkout, and AP2-style agent payment mandates. - name: Sync description: >- Real-time shared-state primitive (Twilio Sync parity) — Documents, Maps, Lists, and ephemeral Streams, with change events relayed over the /api/v1/ws/sync WebSocket gateway - name: Risk description: >- Unified cross-channel Trust & Fraud risk scoring — fuses SMS-pumping, URL-reputation, Verify Fraud Guard, and Voice Biometrics signals into one composite verdict queryable before a send or a call. - name: Orby description: >- In-dashboard Orby operator assistant: streamed assistant turns, conversation threads, product knowledge-base search, and the tool-action approval gate. Available to signed-in operators only (dashboard session auth — API-key requests are rejected). paths: /auth/saml/{orgSlug}/callback: post: tags: - Auth summary: Consume the SAML assertion (ACS) description: >- SAML 2.0 Assertion Consumer Service. The identity provider POSTs a signed `SAMLResponse` here after the user authenticates; Orbit verifies the signature, audience and replay window, provisions a user on first login, then 302-redirects the browser to the dashboard sign-in ticket so the session cookie can be minted. This endpoint is called by the IdP, not directly by your application. parameters: - schema: type: string in: path name: orgSlug required: true description: URL-safe organization slug that selects the SAML configuration. requestBody: required: true content: application/x-www-form-urlencoded: schema: type: object required: - SAMLResponse properties: SAMLResponse: type: string description: Base64-encoded, signed SAML Response XML from the IdP. RelayState: type: string description: >- Opaque value echoed from the login request; carries the signed post-authentication redirect target. example: SAMLResponse: PHNhbWxwOlJlc3BvbnNlIC4uLj48L3NhbWxwOlJlc3BvbnNlPg== RelayState: /dashboard responses: '302': description: >- Assertion accepted; redirect (via the `Location` header) to the dashboard sign-in endpoint with a one-time Clerk ticket that is swapped for a session cookie. '401': description: >- The SAML Response failed verification — bad signature, audience mismatch, or a replayed assertion. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '422': description: The `orgSlug` path parameter or the callback body failed validation. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' components: schemas: ErrorEnvelope: type: object required: - error - meta additionalProperties: false properties: error: type: object required: - code - message - status additionalProperties: false properties: code: type: string message: type: string status: type: integer details: type: object nullable: true additionalProperties: true meta: type: object required: - request_id - timestamp additionalProperties: false properties: request_id: type: string description: Unique request identifier (also returned as X-Request-Id header) timestamp: type: string format: date-time docs_url: type: string format: uri nullable: true securitySchemes: Bearer: type: http scheme: bearer bearerFormat: JWT description: Dashboard JWT token from Clerk ApiKey: type: apiKey name: X-API-Key in: header description: Server-to-server API key (dv_live_sk_*) ````