> ## 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. # Get the duplicate-message suppression policy > Returns the organization's content-hash duplicate-message suppression policy — the opt-in guard that silently drops a send when the identical message body was already delivered to the same recipient on the same channel within the configured window. Use this to inspect the current window, channel restrictions, and category filter before updating or deleting the policy. Returns `data: null` when no policy has ever been configured for the organization. ## OpenAPI ````yaml /openapi.yaml get /api/v1/message-suppression 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: Agents description: AI agent creation, configuration, and execution - name: Voice description: Voice calls, IVR, conferencing, and SIP trunking - name: Webhooks description: Webhook endpoint management and delivery logs - name: Numbers description: Phone number search, provisioning, and configuration - 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: Telegram description: >- Telegram bring-your-own-bot channel: connect a bot, verify a chat against the shared sandbox bot, and read unified channel state. Production sends go through the Messaging API. - name: USSD description: >- Menu-driven USSD for feature phones: define a menu tree, simulate session steps, and host the tenant-scoped aggregator callback. - name: Integrations description: Third-party service connections and OAuth management - name: Files description: >- Server-to-server media upload, listing, retrieval, and deletion (signed-URL backed) - name: Messaging Services description: >- Twilio MessagingService-parity containers bundling sender pool, opt-out list, inbound webhook, and sticky-sender/geomatch flags - name: Sender Pools description: >- Group sending numbers into pools with a selection strategy (sticky / round-robin / random) for outbound sends - name: Opt-Out Lists description: >- Per-list STOP / HELP / START keyword sets and auto-response copy (Twilio Advanced Opt-Out parity) - name: SMPP description: Tenant BYO-SMPP bind credentials and upstream termination carriers - name: Commerce description: >- Unified omnichannel conversational-commerce: cart/checkout state machine, cross-channel payment reconciliation, hosted pay-by-link, native WhatsApp checkout, and agentic-checkout payment mandates - 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/message-suppression: get: tags: - MessageSuppression summary: Get the duplicate-message suppression policy description: >- Returns the organization's content-hash duplicate-message suppression policy — the opt-in guard that silently drops a send when the identical message body was already delivered to the same recipient on the same channel within the configured window. Use this to inspect the current window, channel restrictions, and category filter before updating or deleting the policy. Returns `data: null` when no policy has ever been configured for the organization. parameters: - name: X-Test-Mode in: header required: false description: >- Sandbox opt-in for Clerk-session-authenticated requests. Set to `true` to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response `meta.test_mode: true`. **Ignored for live API keys (`dv_live_sk_*`)** — server-to-server clients must use a test-prefixed key (`dv_test_sk_*`) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header. schema: type: string enum: - 'true' - 'false' responses: '200': description: Successful response. content: application/json: schema: type: object required: - data - meta properties: data: type: - 'null' - object properties: enabled: type: boolean description: >- Whether suppression is active. A disabled policy is kept but never fires on the send path. window_seconds: type: integer minimum: 3600 maximum: 7776000 description: >- Duplicate-detection window in seconds (3600-7776000). An identical body sent to the same recipient on the same channel within this window is suppressed. channels: type: - 'null' - array items: type: string enum: - sms - whatsapp - email - voice - rcs - viber - line - messenger - instagram - push - telegram - in_app description: >- Channels the policy fires on. `null` means every outbound messaging channel. applies_to_categories: type: - 'null' - array items: type: string minLength: 1 maxLength: 64 description: >- Message categories the policy fires on (matched against the message's category/message_type). `null` means every category. Restrict to marketing copy so OTP and transactional resends are never suppressed. updated_at: type: string format: date-time description: ISO-8601 timestamp of the last PUT for this policy. example: enabled: true window_seconds: 86400 channels: - sms - email applies_to_categories: - marketing - promotional updated_at: '2026-08-28T12:00:00.000Z' meta: type: object properties: request_id: type: string timestamp: type: string format: date-time example: data: enabled: true window_seconds: 86400 channels: - sms - email applies_to_categories: - marketing - promotional updated_at: '2026-08-28T12:00:00.000Z' meta: request_id: req_9f4b2d8c1a7e timestamp: '2026-08-28T12:00:00.000Z' '400': $ref: '#/components/responses/StandardError' '401': $ref: '#/components/responses/StandardError' '403': $ref: '#/components/responses/StandardError' '404': $ref: '#/components/responses/StandardError' '422': $ref: '#/components/responses/StandardError' '429': $ref: '#/components/responses/RateLimitedResponse' '500': $ref: '#/components/responses/StandardError' components: responses: StandardError: description: >- Standard error envelope. `error.code` is machine-readable; see the [error reference](https://docs.orbit.devotel.io/reference/error-codes) for the catalogue. content: application/json: schema: type: object properties: error: type: object required: - code - message - status properties: code: type: string description: Machine-readable error code (e.g. INVALID_PHONE_NUMBER) message: type: string description: Human-readable error description status: type: integer description: HTTP status code details: type: object additionalProperties: true description: Additional context about the error meta: type: object properties: request_id: type: string timestamp: type: string format: date-time docs_url: type: string format: uri description: Link to relevant error documentation RateLimitedResponse: description: >- Rate limit exceeded. Wait `error.retry_after` seconds (or read the `Retry-After` header) before retrying. Returned when the request would exceed the bucket identified by `X-RateLimit-Bucket`. headers: X-RateLimit-Limit: description: Total request quota for the current window. schema: type: integer minimum: 0 X-RateLimit-Remaining: description: Requests remaining in the current window. schema: type: integer minimum: 0 X-RateLimit-Reset: description: >- Absolute unix-epoch-seconds timestamp at which the current window resets. schema: type: integer minimum: 0 X-RateLimit-Bucket: description: >- Name of the rate-limit bucket the request was bound by (e.g. `auth-write`, `money`, `agent-invoke`, or `custom:/`). Stripe-style — lets clients see which named cap they hit. schema: type: string RateLimit-Limit: description: >- draft-ietf-httpapi-ratelimit-headers no-prefix mirror of `X-RateLimit-Limit`. Some SDKs read only this form. schema: type: integer minimum: 0 RateLimit-Remaining: description: >- draft-ietf-httpapi-ratelimit-headers no-prefix mirror of `X-RateLimit-Remaining`. schema: type: integer minimum: 0 RateLimit-Reset: description: >- draft-ietf-httpapi-ratelimit-headers no-prefix mirror — delta seconds from now until the window resets (NOT epoch). schema: type: integer minimum: 0 Retry-After: description: >- RFC 7231 §7.1.3 — number of seconds the client should wait before retrying. schema: type: integer minimum: 1 content: application/json: schema: type: object properties: error: type: object required: - code - message - status - retry_after properties: code: type: string enum: - RATE_LIMITED description: >- Always `RATE_LIMITED` — the global request-limiter 429. Distinct from `RATE_LIMIT_EXCEEDED`, the live per-recipient/per-tenant/per-resource frequency-cap 429 (not retired). message: type: string status: type: integer enum: - 429 retry_after: type: integer minimum: 1 description: >- Seconds to wait before retrying. Mirrors `Retry-After` header. meta: type: object properties: request_id: type: string timestamp: type: string format: date-time docs_url: type: string format: uri 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_*) ````