> ## 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. # Single cost rule > Get a single cost rule by ID, including nested `scopes`, `conditions`, `tiers` (with `effects`), and `vendor_name`. Requires the tenant **Cost Rules** feature flag. ## OpenAPI ````yaml /api-reference/build.yaml get /cost-rules/{id} 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: Purchase Orders description: Get and modify purchase orders - 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: /cost-rules/{id}: get: tags: - Cost Rules summary: Single cost rule description: | Get a single cost rule by ID, including nested `scopes`, `conditions`, `tiers` (with `effects`), and `vendor_name`. Requires the tenant **Cost Rules** feature flag. operationId: getCostRuleById parameters: - in: path name: id required: true schema: type: integer description: Cost rule ID. responses: '200': description: Successful response content: application/json: schema: type: object properties: data: type: object description: > A cost rule — vendor-scoped tiered pricing or extra-cost rule applied to purchase orders, work orders, and shipments. Nested `scopes`, `conditions`, and `tiers` (with `effects`) are only present when the relation is loaded (always on `GET /cost-rules/{id}`). properties: id: type: integer description: Cost rule ID. vendor_id: type: integer nullable: true description: >- Supplier / factory ID the rule is scoped to. Null for an EXTRA_COST rule with no supplier condition. vendor_name: type: string nullable: true description: >- Supplier factory name. Only present when the vendor relation is loaded. name: type: string description: Rule name, unique per vendor among non-deleted rules. description: type: string nullable: true document_type: type: string nullable: true description: First entry of `document_types` (convenience field). enum: - PURCHASE_ORDER - WORK_ORDER - SHIPMENT document_types: type: array description: Document types the rule applies to. items: type: string enum: - PURCHASE_ORDER - WORK_ORDER - SHIPMENT tier_mode: type: string nullable: true enum: - NON_GRADUATED - GRADUATED tier_quantity_basis: type: string nullable: true enum: - LINE - SCOPE_GROUP priority: type: integer nullable: true description: Evaluation priority (1–1000, lower wins). status: type: string enum: - ACTIVE - INACTIVE - DRAFT is_active: type: boolean description: Convenience flag — true when `status` is `ACTIVE`. effective_from: type: string format: date nullable: true effective_to: type: string format: date nullable: true moq: type: number nullable: true description: Minimum order quantity. order_multiple: type: number nullable: true output_kind: type: string nullable: true enum: - UNIT_COST - EXTRA_COST extra_cost_item_name: type: string nullable: true cost_allocation_type: type: string nullable: true enum: - UNIT_BASED_ALLOCATION - VOLUME_BASED_ALLOCATION - WEIGHT_BASED_ALLOCATION - VALUE_BASED_ALLOCATION cost_basis: type: string nullable: true enum: - PERCENTAGE - FIXED cost_basis_amount: type: number nullable: true shipment_type: type: string nullable: true description: >- Optional Air/Sea/Road/Rail/Express scope for shipment rules. options: type: object description: Rule-level options bag. properties: auto_apply: type: boolean description: >- Server fires this rule automatically on PO / shipment save. add_as_additional_fee: type: boolean description: >- Mirror the produced line to a PO additional fee (PURCHASE_ORDER + EXTRA_COST only). scopes: type: array description: >- Product / category / tag / supplier-SKU scopes. Present when loaded. items: type: object properties: id: type: integer cost_rule_id: type: integer scope_type: type: string enum: - PRODUCT - SUPPLIER_SKU - CATEGORY - SUBCATEGORY - TAG - ATTRIBUTE scope_value: type: string scope_operator: type: string nullable: true enum: - EQUALS - NOT_EQUALS - IN - NOT_IN - CONTAINS - STARTS_WITH - ENDS_WITH - GREATER_THAN - LESS_THAN - GREATER_THAN_OR_EQUALS - LESS_THAN_OR_EQUALS - ALL scope_extra: type: object nullable: true conditions: type: array description: >- Document-level applicability gates (extra-cost rules). Present when loaded. items: type: object properties: id: type: integer cost_rule_id: type: integer condition_type: type: string enum: - SUPPLIER - SOURCE_WAREHOUSE - DESTINATION_WAREHOUSE - SHIPMENT_TYPE operator: type: string nullable: true enum: - IN - NOT_IN values: type: array items: type: string tiers: type: array description: >- Quantity tiers with their effects. Present when loaded. items: type: object properties: id: type: integer cost_rule_id: type: integer min_quantity: type: number max_quantity: type: number nullable: true effects: type: array items: type: object properties: id: type: integer cost_rule_id: type: integer cost_rule_tier_id: type: integer effect_type: type: string enum: - BASE_PRICE - PERCENT_DISCOUNT - PERCENT_MARKUP - FIXED_PER_UNIT - FIXED_PER_LINE - FIXED_PER_DOCUMENT - MINIMUM_FLOOR amount: type: number order: type: integer nullable: true description: Effect sequence within the tier. description: type: string nullable: true created_at: type: string format: date-time updated_at: type: string format: date-time '401': description: Unauthorized content: application/json: schema: type: object properties: message: type: string '404': description: >- Cost rule not found, or Cost Rules feature 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. ````