> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcuserp.com/llms.txt > Use this file to discover all available pages before exploring further. # Account analytics summary (with optional point-in-time as-of review) > Returns the account's buying-analytics summary: RFM (recency / frequency / monetary + segment), account health score + band + trend, TTM revenue, average order value, and the revenue trend percentage. Default (no `as_of`): the stored denormalized analytics columns (refreshed nightly + incrementally on order events). Point-in-time review (`?as_of=YYYY-MM-DD`): re-anchors the trailing windows (recency, the 12-month TTM, and the 3-month revenue/frequency trend) to the supplied historical date and recomputes RFM / health / TTM / revenue-trend IN MEMORY. This is a READ-ONLY review -- it NEVER persists, never updates the account, never emits events. Useful for migrated accounts whose latest order predates today, so you can see each customer's standing "as of" the data's latest point instead of an arbitrary later wall-clock now. Industry precedent: NetSuite SuiteAnalytics "As-Of Date", Salesforce/HubSpot snapshot-date reports, QuickBooks/Xero "as of date". The review response is the same shape as the default plus `as_of` (the echoed date) and `is_review: true`. ## OpenAPI ````yaml /openapi.yaml get /accounts/{id}/analytics/summary openapi: 3.1.0 info: title: Arcus ERP Public API version: 1.0.0 description: > Arcus ERP public REST API. Designed for external integrations and data migration. **Authentication.** Bearer token (API key) via the `Authorization` header. Format: `Authorization: Bearer ark_live_ent__` (or `ark_test_*` for sandbox). API keys are issued per-entity in **Settings > Developers > API Keys**. **Entity scoping.** The entity is encoded in the API key prefix; routes are flat (e.g. `/v1/accounts`, `/v1/orders`, `/v1/products`). A small set of platform endpoints (migration, reconciliation, events, webhook endpoints, API keys) use the `/v1/entities/{entity_id}/...` form -- those are noted in their tags. **Key capabilities.** - Related-resource hydration via `?expand[]=` (see `x-arcus-expand` on each resource). - Cursor-based pagination (`starting_after` / `ending_before` / `limit`). - Idempotency via the `Idempotency-Key` header. - Webhook events for asynchronous notification. - Conditional requests / ETag for cache validation. servers: - url: https://api.arcuserp.com/v1 description: Arcus ERP API (accepts both live `ark_live_*` and test `ark_test_*` keys) - url: https://dev-api.arcuserp.com/v1 description: >- Dev sandbox API (test-only data, accepts `ark_test_*` keys against dev RDS) security: [] paths: /accounts/{id}/analytics/summary: parameters: - name: id in: path required: true schema: type: string description: Account UUID or account_number slug. get: tags: - Accounts summary: Account analytics summary (with optional point-in-time as-of review) description: > Returns the account's buying-analytics summary: RFM (recency / frequency / monetary + segment), account health score + band + trend, TTM revenue, average order value, and the revenue trend percentage. Default (no `as_of`): the stored denormalized analytics columns (refreshed nightly + incrementally on order events). Point-in-time review (`?as_of=YYYY-MM-DD`): re-anchors the trailing windows (recency, the 12-month TTM, and the 3-month revenue/frequency trend) to the supplied historical date and recomputes RFM / health / TTM / revenue-trend IN MEMORY. This is a READ-ONLY review -- it NEVER persists, never updates the account, never emits events. Useful for migrated accounts whose latest order predates today, so you can see each customer's standing "as of" the data's latest point instead of an arbitrary later wall-clock now. Industry precedent: NetSuite SuiteAnalytics "As-Of Date", Salesforce/HubSpot snapshot-date reports, QuickBooks/Xero "as of date". The review response is the same shape as the default plus `as_of` (the echoed date) and `is_review: true`. operationId: getAccountAnalyticsSummary parameters: - name: as_of in: query required: false schema: type: string format: date description: > Optional point-in-time review anchor (YYYY-MM-DD). Must be a real calendar date and `<= today`. A malformed or future date returns 400 `invalid_as_of_date`. responses: '200': description: Account analytics summary (review path adds `as_of` + `is_review`). content: application/json: schema: type: object properties: data: type: object properties: ttm_revenue: type: number avg_order_value: type: number rfm_recency: type: integer rfm_frequency: type: integer rfm_monetary: type: integer rfm_score: type: string rfm_segment: type: string account_health_score: type: integer account_health_band: type: string account_health_trend: type: string revenue_trend_pct: type: number days_since_last_order: type: integer as_of: type: string format: date nullable: true description: Present (echoed) only on the as-of review path. is_review: type: boolean description: True only on the as-of review path. '400': description: Invalid or future `as_of` date (`invalid_as_of_date`). content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '401': $ref: '#/components/responses/Error' '403': $ref: '#/components/responses/Error' '404': $ref: '#/components/responses/Error' security: - ApiKeyAuth: - accounts:read components: schemas: ErrorEnvelope: type: object description: | Canonical error response envelope. All API errors use this shape. required: - error - code properties: error: type: string description: Machine-readable error key example: not_found code: type: string description: Machine-readable error code (often same as error) example: not_found type: type: string enum: - validation_error - permission_error - not_found - conflict - rate_limit - internal - expand_error - not_implemented example: not_found hint: type: string description: Human-readable one-sentence explanation (English) example: >- The requested order does not exist or does not belong to this entity. param: type: string description: The parameter that caused the error, if applicable example: expand[0] required: type: string description: The scope required (only on insufficient_scope errors) example: accounts:read request_id: type: string description: >- Unique request ID for support tracing (maps to CloudWatch log stream) example: req_abc123 responses: Error: description: Error response (400/401/403/404/409/422/429/500) content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' securitySchemes: ApiKeyAuth: type: http scheme: bearer description: | API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent__ Test keys use ark_test_ent__. Both are issued per entity via Settings > Developers > API Keys. ````