> ## 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. # Build a segment from a natural-language description (AI) > Translate a natural-language audience description into structured Orbit segment rules and return them together with a live preview match-count and sample contacts, in a single round-trip. The proposed rules are constrained to the segmentation engine's allowlisted fields, validated with a dry-run before the preview, and returned in both the dashboard's flat rule shape and the normalised FilterAst the engine consumes. Requires the `contacts:write` scope (owner / admin / developer). Returns `503 SERVICE_UNAVAILABLE` when the AI backend is not configured for the platform; callers should fall back to the manual segment builder. ## OpenAPI ````yaml /openapi.yaml post /api/v1/contacts/segments/autopilot 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: /api/v1/contacts/segments/autopilot: post: tags: - Segments summary: Build a segment from a natural-language description (AI) description: >- Translate a natural-language audience description into structured Orbit segment rules and return them together with a live preview match-count and sample contacts, in a single round-trip. The proposed rules are constrained to the segmentation engine's allowlisted fields, validated with a dry-run before the preview, and returned in both the dashboard's flat rule shape and the normalised FilterAst the engine consumes. Requires the `contacts:write` scope (owner / admin / developer). Returns `503 SERVICE_UNAVAILABLE` when the AI backend is not configured for the platform; callers should fall back to the manual segment builder. requestBody: content: application/json: schema: type: object required: - description properties: description: type: string minLength: 1 maxLength: 2000 description: >- Natural-language description of the audience to build (e.g. "customers in Germany who opened an email in the last 30 days"). The handler asks the LLM to translate it into structured segment rules constrained to the segmentation engine's allowlisted fields. preview_limit: type: integer minimum: 0 maximum: 50 default: 10 description: >- Maximum number of sample contacts returned in `preview.sample_contacts`. Keeps the payload bounded — the dashboard renders only the first 10. responses: '200': description: >- The proposed segment rules plus a live preview (match count + sample contacts), wrapped in the standard `{ data, meta }` envelope. content: application/json: schema: type: object additionalProperties: true properties: data: type: object additionalProperties: true meta: type: object additionalProperties: true '422': description: >- AI_PARSE_FAILED / AI_INVALID_RULES — the model output could not be coerced into a supported rule shape. '503': description: >- SERVICE_UNAVAILABLE — the AI backend is not configured for the platform; fall back to the manual segment builder. components: 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_*) ````