> ## 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. # Add an extra cost > Add one assembly cost line to a draft, planned or in-progress work order. Other lines are unchanged. - **Lines are per unit produced.** `quantity` is multiplied by the quantity produced at completion. - **A line reaches only assembly orders created after it is added.** An assembly order that already exists keeps the lines it had, so add lines before quick-complete or before completing a step. - **Line limit:** `quantity × unit_price` may not exceed 99,999,999.99; larger lines return `422` (split them). The same limit applies at completion to each line multiplied by the quantity produced: a completion over it is refused with `422` and that step posts nothing. - Completed and cancelled work orders return `422` and nothing changes. Writes also return `422` when the cost rules feature is not enabled on the account. - The COGS tab in the app saves all its lines at once, so a save from a tab opened earlier can overwrite a line added here in the meantime. - Document charges (the Charges tab) are not covered; they never reach cost. ## Retries and idempotency Accepts an optional `Idempotency-Key` header. Send one so a retry can't add the cost twice: a retry with the same key and body replays the first response (with an `Idempotent-Replay: true` header); the same key with a different body returns `409`. Keys are kept for 24 hours and are scoped to your API token. ## OpenAPI ````yaml /api-reference/build.yaml post /work-orders/{workOrderId}/extra-costs 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: Freight description: >- Freightview LTL freight — quotes, booking and documents for fulfillment orders - 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 Warehouse description: >- Warehouse-floor lookups for PickFlow — barcode resolution, bin and product stock, bin search, and receivables - 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: Drive description: > Browse, upload, tag and manage files in your Luminous Drive. An API token sees the shared drive only, never My Files or restricted folders and files. Every write and download made through the API is recorded in the file's activity log (`GET /file-cabinet/files/{id}/activity`) with `actor_kind: api_token`. - name: Integration Mappings description: Manage integration mappings for external systems - name: Integration Field Mappings description: Manage field-level mappings between Luminous and external systems - name: Automations description: Create, test, and inspect automation rules and their runs paths: /work-orders/{workOrderId}/extra-costs: post: tags: - Work Orders summary: Add an extra cost description: > Add one assembly cost line to a draft, planned or in-progress work order. Other lines are unchanged. - **Lines are per unit produced.** `quantity` is multiplied by the quantity produced at completion. - **A line reaches only assembly orders created after it is added.** An assembly order that already exists keeps the lines it had, so add lines before quick-complete or before completing a step. - **Line limit:** `quantity × unit_price` may not exceed 99,999,999.99; larger lines return `422` (split them). The same limit applies at completion to each line multiplied by the quantity produced: a completion over it is refused with `422` and that step posts nothing. - Completed and cancelled work orders return `422` and nothing changes. Writes also return `422` when the cost rules feature is not enabled on the account. - The COGS tab in the app saves all its lines at once, so a save from a tab opened earlier can overwrite a line added here in the meantime. - Document charges (the Charges tab) are not covered; they never reach cost. ## Retries and idempotency Accepts an optional `Idempotency-Key` header. Send one so a retry can't add the cost twice: a retry with the same key and body replays the first response (with an `Idempotent-Replay: true` header); the same key with a different body returns `409`. Keys are kept for 24 hours and are scoped to your API token. operationId: addWorkOrderExtraCost parameters: - in: path name: workOrderId required: true description: ID of the work order. schema: type: integer - in: header name: Idempotency-Key required: false schema: type: string description: > Optional idempotency token. A retry with the same key and body replays the original stored response instead of adding a second line. Reusing the key with a different body returns `409`. requestBody: required: true content: application/json: schema: type: object required: - name - quantity - unit_price properties: name: type: string maxLength: 255 description: Name/description of the cost. example: Plating quantity: type: number minimum: 0 maximum: 1000000000000 description: Quantity **per unit produced**, up to 6 decimal places. example: 2 unit_price: type: number minimum: 0 maximum: 99999999.99 description: >- Unit price, up to 2 decimal places. `quantity × unit_price` may not exceed 99,999,999.99. example: 50 responses: '201': description: Extra cost line added content: application/json: schema: type: object properties: data: type: object properties: id: type: integer description: Unique identifier for the extra cost line name: type: string description: Name/description of the cost quantity: type: number format: float description: >- Quantity **per unit produced**. Multiplied by the quantity produced when the cost reaches the finished item. unit_price: type: number format: float description: Unit price for this cost line_total: type: number format: float description: >- quantity × unit_price, the cost for **one** unit produced. Read-only. source: type: string nullable: true description: > Where the line came from. `work_order` (or `null`) lines were added on the work order and can be changed or removed. Any other value (for example `rule`, a line created by a cost rule) is read-only here. created_at: type: string format: date-time description: Timestamp when the line was created updated_at: type: string format: date-time description: Timestamp when the line was last updated required: - id - name - quantity - unit_price - line_total '401': description: Unauthorized content: application/json: schema: type: object properties: message: type: string '404': description: Work order not found content: application/json: schema: type: object properties: message: type: string '409': description: >- Idempotency conflict (key in flight, or reused with a different body). content: application/json: schema: type: object properties: message: type: string '422': description: > Validation error, the work order is completed or cancelled, the line total exceeds 99,999,999.99 (`That comes to more than we can record on one line. Please split it.`), or the cost rules feature is not enabled. 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. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.