> ## 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. # Report lift for a personalization slot > Compare two variants of a slot on the traffic each one actually received and report which converts better. Pass the baseline arm as `variant_a` — use `__default__` to make the segment's untagged fallback content the baseline, the closest this feature has to a holdout — the variant under test as `variant_b`, and the event name that counts as a conversion. Impressions come from the personalization events the web and mobile SDKs already send on every render, so nothing new has to be instrumented. The report returns each arm's impressions, conversions and conversion rate, the absolute and relative lift, a 95% confidence interval, a z-score, a p-value and whether the difference is significant. `state` is `no_traffic` while neither arm has been served and `collecting` while only one has, and the statistical fields stay null until both arms have traffic. A `segment_label` the platform does not recognise is treated as no filter. ## OpenAPI ````yaml /openapi.yaml get /api/v1/personalization/slots/{slot}/lift 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/personalization/slots/{slot}/lift: get: tags: - Personalization summary: Report lift for a personalization slot description: >- Compare two variants of a slot on the traffic each one actually received and report which converts better. Pass the baseline arm as `variant_a` — use `__default__` to make the segment's untagged fallback content the baseline, the closest this feature has to a holdout — the variant under test as `variant_b`, and the event name that counts as a conversion. Impressions come from the personalization events the web and mobile SDKs already send on every render, so nothing new has to be instrumented. The report returns each arm's impressions, conversions and conversion rate, the absolute and relative lift, a 95% confidence interval, a z-score, a p-value and whether the difference is significant. `state` is `no_traffic` while neither arm has been served and `collecting` while only one has, and the statistical fields stay null until both arms have traffic. A `segment_label` the platform does not recognise is treated as no filter. parameters: - schema: type: string minLength: 1 maxLength: 50 in: query name: variant_a required: true description: >- Baseline arm — a variant name, or `__default__` for the segment's untagged default content. - schema: type: string minLength: 1 maxLength: 50 in: query name: variant_b required: true description: >- Treatment arm — the variant under test. Must differ from `variant_a`, otherwise the request is rejected. - schema: type: string minLength: 1 maxLength: 100 pattern: ^[a-zA-Z0-9_.-]+$ in: query name: conversion_event required: true description: >- Name of the SDK event that counts as a conversion, e.g. `clicked_cta` or `purchase`. - schema: type: string minLength: 1 maxLength: 64 in: query name: segment_label required: false description: >- Report only on visitors in this segment (`champion`, `high_value_engaged`, `engaged`, `new`, `passive`, `at_risk`, `dormant`, `lost`). Unrecognised values are ignored. - schema: type: integer minimum: 1 maximum: 365 default: 30 in: query name: since_days required: false description: Lookback window in days (1–365). - schema: type: string minLength: 1 maxLength: 100 in: path name: slot required: true description: Slot key to report on, e.g. `hero-banner`. - 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: >- The lift report — `data.arm_a` and `data.arm_b` carry each arm's impressions, conversions and conversion rate, and `data.absolute_lift_pct`, `data.relative_lift_pct`, `data.confidence_interval`, `data.z_score`, `data.p_value` and `data.is_significant` describe the difference. Those are null while `data.state` is `no_traffic` or `collecting`. content: application/json: schema: type: object additionalProperties: true description: >- The lift report — `data.arm_a` and `data.arm_b` carry each arm's impressions, conversions and conversion rate, and `data.absolute_lift_pct`, `data.relative_lift_pct`, `data.confidence_interval`, `data.z_score`, `data.p_value` and `data.is_significant` describe the difference. Those are null while `data.state` is `no_traffic` or `collecting`. properties: data: type: object additionalProperties: true meta: type: object additionalProperties: true '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_*) ````