> ## Documentation Index > Fetch the complete documentation index at: https://docs.joinluminous.com/llms.txt > Use this file to discover all available pages before exploring further. # Get a Core inventory transaction > Retrieve a single Core inventory ledger transaction (CIT) with its allocated cost lines, lineage, and a `unit_cost_breakdown` explaining how the transaction's unit cost is derived from its cost lines. **Availability:** Returns **404** for tenants that do not have Luminous Core enabled, or when the transaction does not exist. ## OpenAPI ````yaml /api-reference/build.yaml get /core/inventory-transactions/{transactionId} openapi: 3.0.0 info: title: Luminous API version: 1.0.0 description: API documentation for Luminous servers: - url: https://{companyName}.api.joinluminous.com/external/api/v1 variables: companyName: default: companyName description: Your company-specific subdomain security: [] tags: - name: Products description: Get and manage products - name: Pricing description: Manage price schedules, levels, and customizations - name: BOMs description: Manage Bills of Materials (BOMs) - name: Labels description: Label rendering via Labelary ZPL service - name: Companies description: Manage business accounts and their associated data - name: Contacts description: Manage contact information for individuals - name: Suppliers description: Manage suppliers (factories) — vendors used on purchase orders - name: Supplier SKUs description: Manage per-supplier SKU and unit-cost overrides for products - name: Locations description: Manage warehouses and locations - name: Inventory description: Get and adjust product stock levels - name: Lots description: Create, update, and delete product lots (batches) - name: Transfer Orders description: Manage transfer orders - name: Fulfillment Orders description: Manage fulfillment orders and picklists - name: Fulfillment Priority Lists description: Configure fulfillment routing priority lists - name: Purchase Orders description: Get and modify purchase orders - name: Supplier Portal description: >- Read a supplier's response to a purchase order and control the one-click portal link - name: Receiving Reports description: Manage receiving reports - name: Payment Obligations description: Manage payment obligations for purchase orders - name: Sales Orders description: Manage sales orders and sales order shipments - name: Purgatory description: >- Inspect and resolve non-posted sales orders in the purgatory staging workflow - name: PickFlow Shipping description: >- Provider-agnostic shipping rates, services, packages, and label purchase for PickFlow - name: Cycle Counts description: >- Create, drive, and post PickFlow cycle counts — batches, per-warehouse sessions, and CSV import/export - name: Print Stations description: List paired print stations and enqueue print jobs to them - name: Invoices description: Get and manage invoices - name: Work Orders description: >- Manage work orders — production lifecycle, steps, materials, links, shipments, and comments - name: Production Batches description: Group and manage work orders as production batches - name: Bills description: >- Accounts payable bill management, payments, attachments, allocations, and variance - name: Prepayments description: Manage vendor prepayments and applications - name: Vendor Credits description: Manage vendor credits and applications - name: Vendor Returns description: Manage vendor returns and credit generation - name: Customer Returns description: Manage customer returns (sales returns), receiving, and restock behavior - name: Stock Snapshot description: Point-in-time stock snapshots with export support - name: Consumption description: Consumption reports and exports - name: Inventory Aging description: Cost-layer-based inventory aging reports - name: Bills Reports description: Accounts payable bills aging reports - name: Forecast description: Materialized forecast data - name: Reports description: Close the books, inventory discrepancy, transaction COGS, and EDI reports - name: Tags description: Add/remove tags across various resources - name: Custom Fields description: Get and set custom fields across various resources - name: Currency description: Currency configuration, exchange rates, and conversion - name: Integration Mappings description: Manage integration mappings for external systems - name: Integration Field Mappings description: Manage field-level mappings between Luminous and external systems paths: /core/inventory-transactions/{transactionId}: get: tags: - Core Inventory Ledger summary: Get a Core inventory transaction description: > Retrieve a single Core inventory ledger transaction (CIT) with its allocated cost lines, lineage, and a `unit_cost_breakdown` explaining how the transaction's unit cost is derived from its cost lines. **Availability:** Returns **404** for tenants that do not have Luminous Core enabled, or when the transaction does not exist. operationId: getCoreInventoryTransaction parameters: - in: path name: transactionId required: true schema: type: integer description: Core inventory transaction id. responses: '200': description: Core inventory transaction detail. content: application/json: schema: type: object properties: transaction: type: object description: >- The transaction record (id, item, date, qty, unit_cost, total_cost, linkage, etc.). costs: type: array description: >- Allocated cost lines contributing to the transaction's total cost. items: type: object properties: id: type: integer inventory_cost_id: type: integer nullable: true kind: type: string nullable: true kind_label: type: string nullable: true unit_cost: type: number nullable: true total_cost: type: number _links: type: object properties: inventory_cost: type: string format: uri lineage_cards: type: array description: >- Related upstream/downstream transactions in this transaction's cost lineage. items: type: object unit_cost_breakdown: type: object description: >- Explains how `unit_cost` is derived from the allocated cost lines. properties: qty: type: number abs_qty: type: number unit_cost: type: number total_cost: type: number sum_of_cost_lines: type: number computed_unit_cost_from_lines: type: number nullable: true explanation: type: string lines: type: array items: type: object properties: citc_id: type: integer nullable: true inventory_cost_id: type: integer nullable: true kind: type: string nullable: true kind_label: type: string nullable: true total_cost: type: number unit_cost: type: number nullable: true _links: type: object properties: self: type: string format: uri detail: type: string format: uri '401': description: Unauthorized content: application/json: schema: type: object properties: message: type: string '404': description: Not found, or Luminous Core is not enabled for this tenant. content: application/json: schema: type: object properties: message: type: string security: - BearerAuth: [] components: securitySchemes: BearerAuth: type: http scheme: bearer description: >- Authenticate using a bearer token. To create a token, navigate to /settings/api-tokens and click Create API Token. ````