> ## Documentation Index > Fetch the complete documentation index at: https://docs.autoprintfarm.com/llms.txt > Use this file to discover all available pages before exploring further. # Inventory turnover and material usage > Returns the lowest-stocked SKUs (top 20), filament-spool stock state, material usage totals, and daily usage trend over the date range. SKU pricing fields are never exposed. ## OpenAPI ````yaml /api-reference/openapi.json get /analytics/inventory openapi: 3.1.0 info: title: AutoPrintFarm Public API version: 1.0.0 description: >- Public API for AutoPrintFarm — read + write surface for printers, jobs, inventory, orders, SKUs, files, worklist, and assembly. Authorization uses three scopes: `read` (any list/get), `write` (data mutations — create, update, delete, uploads, fulfillment), and `control` (physical printer actions: start, pause, resume, stop, heaters, light, filament). Authenticate with an API key minted from Settings → API Keys in the AutoPrintFarm dashboard. contact: name: AutoPrintFarm url: https://autoprintfarm.com servers: - url: https://api.autoprintfarm.com/public/v1 description: Production security: - bearerAuth: [] tags: - name: Printers description: Printer fleet status - name: Jobs description: Print job queue and history - name: Inventory description: Finished-goods stock levels - name: Orders description: Customer orders and line items - name: Wiki description: Internal documentation articles - name: Worklist description: Operational task queue - name: Products description: Product catalog, SKUs, components, and color presets - name: Files description: Print file metadata and versions - name: Hubs description: Hub fleet and connection status - name: Assembly description: Post-print assembly tasks with bundled wiki - name: Materials description: Filament, components, packaging, and printer parts inventory - name: Analytics description: >- Dashboard rollups and reporting (overview, production, printers, failures, inventory, revenue) paths: /analytics/inventory: get: tags: - Analytics summary: Inventory turnover and material usage description: >- Returns the lowest-stocked SKUs (top 20), filament-spool stock state, material usage totals, and daily usage trend over the date range. SKU pricing fields are never exposed. parameters: - schema: type: string description: >- Start of the reporting window (ISO date, e.g. 2026-01-01). Defaults to 30 days ago. required: false description: >- Start of the reporting window (ISO date, e.g. 2026-01-01). Defaults to 30 days ago. name: from in: query - schema: type: string description: End of the reporting window (ISO date). Defaults to today. required: false description: End of the reporting window (ISO date). Defaults to today. name: to in: query responses: '200': description: Inventory analytics report content: application/json: schema: type: object properties: success: type: boolean enum: - true data: $ref: '#/components/schemas/AnalyticsInventory' required: - success - data '401': description: Missing, invalid, revoked, or expired API key content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: API key lacks the required scope content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Rate limit exceeded (120 req/min/key) content: application/json: schema: $ref: '#/components/schemas/Error' security: - bearerAuth: - read components: schemas: AnalyticsInventory: type: object properties: date_range: type: object properties: from: type: string to: type: string required: - from - to summary: type: object properties: low_stock_skus: type: number low_filament_spools: type: number total_material_types: type: number required: - low_stock_skus - low_filament_spools - total_material_types low_stock_items: type: array items: type: object properties: id: type: string sku: type: string color: type: - string - 'null' stock_level: type: number low_stock_threshold: type: - number - 'null' product_name: type: - string - 'null' required: - id - sku - color - stock_level - low_stock_threshold - product_name filament_inventory: type: array items: type: object properties: type: type: string color: type: - string - 'null' status: type: - string - 'null' remaining_grams: type: number low_threshold: type: - number - 'null' required: - type - color - status - remaining_grams - low_threshold material_usage: type: array items: type: object properties: material_type: type: string total_usage: type: number required: - material_type - total_usage usage_trend: type: array items: type: object properties: date: type: string usage: type: number required: - date - usage required: - date_range - summary - low_stock_items - filament_inventory - material_usage - usage_trend Error: type: object properties: success: type: boolean enum: - false error: type: object properties: code: type: string description: >- Machine-readable error code (e.g. NOT_FOUND, VALIDATION_ERROR, FORBIDDEN, HUB_OFFLINE). Stable across releases — use this for branching. example: NOT_FOUND message: type: string description: >- Human-readable error message. May vary across releases — do not branch on this. example: Resource not found details: description: >- Optional structured detail. For VALIDATION_ERROR this is `{ field: [messages] }`. required: - code - message description: Error detail object required: - success - error description: Standard error response envelope securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: apf_live_<64 hex> description: >- API keys are minted in the AutoPrintFarm web app under Settings → API Keys. Send as `Authorization: Bearer apf_live_...`. Keys are shown exactly once at creation and can be revoked at any time. ````