> ## 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. # Mark a phone or email as Do-Not-Call/Contact > Record a Do-Not-Call/Contact request captured by an AI agent's `mark_dnc` tool during a conversation. Adds the phone number or email to your suppression list — and, for voice and SMS, to your Do-Not-Call list — then marks any matching contact as Do-Not-Contact so it is excluded from the next campaign audience, and fires the `agent.dnc.marked` webhook. Idempotent — repeating the call for an already-suppressed address returns success without creating duplicates or re-firing the webhook. Requires at least one of `phone` or `email`. ## OpenAPI ````yaml /openapi.yaml post /api/v1/agents/dnc 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 paths: /api/v1/agents/dnc: post: tags: - Agents summary: Mark a phone or email as Do-Not-Call/Contact description: >- Record a Do-Not-Call/Contact request captured by an AI agent's `mark_dnc` tool during a conversation. Adds the phone number or email to your suppression list — and, for voice and SMS, to your Do-Not-Call list — then marks any matching contact as Do-Not-Contact so it is excluded from the next campaign audience, and fires the `agent.dnc.marked` webhook. Idempotent — repeating the call for an already-suppressed address returns success without creating duplicates or re-firing the webhook. Requires at least one of `phone` or `email`. requestBody: required: true content: application/json: schema: type: object properties: phone: type: string description: >- E.164 phone number (e.g. +14155551234). At least one of phone/email is required. email: type: string format: email channel: type: string enum: - all - voice - sms - email - whatsapp description: >- Which channel(s) the suppression applies to. Defaults to all. reason: type: string maxLength: 500 conversation_id: type: string maxLength: 120 example: phone: '+14155551234' channel: all reason: Customer asked not to be contacted again responses: '200': description: Suppression persisted (or already in effect). content: application/json: schema: type: object properties: data: type: object properties: status: type: string enum: - suppressed channel: type: string reason: type: string nullable: true new_suppression_rows: type: integer suppressed_voice_dnc: type: boolean contacts_flipped: type: integer description: Number of matching contacts marked as Do-Not-Contact. phone: type: string email: type: string meta: $ref: '#/components/schemas/ResponseMeta' '422': description: >- Neither phone nor email was provided, or the phone/email failed validation. components: schemas: ResponseMeta: 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_*) ````