> ## Documentation Index > Fetch the complete documentation index at: https://docs.bizzyco.ai/llms.txt > Use this file to discover all available pages before exploring further. # Create invoice line item > Add a line item to a draft invoice. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/invoices/{id}/line-items openapi: 3.1.0 info: title: Bizzy API version: 1.0.0 description: Bizzy API for managing businesses, customers, contacts, and more. servers: - url: https://api.bizzyco.ai description: Production security: [] tags: - name: Automations description: Manage workflow automation rules x-group: Automations - name: Automation Executions description: View automation execution history x-group: Automations - name: Businesses description: Manage business profiles x-group: Businesses - name: Business Offerings description: Manage products and services offered by businesses x-group: Businesses - name: Business Online Presences description: Manage websites and social media links x-group: Businesses - name: Business Physical Presences description: Manage physical locations and addresses x-group: Businesses - name: Business Profile description: View and update business profile details x-group: Businesses - name: Contacts description: Manage contact records x-group: Contacts - name: Contact Addresses description: Manage mailing addresses for contacts x-group: Contacts - name: Contact Emails description: Manage email addresses for contacts x-group: Contacts - name: Contact Phone Numbers description: Manage phone numbers for contacts x-group: Contacts - name: Customers description: Manage customer records x-group: Customers - name: Customer Transactions description: View customer transaction history x-group: Customers - name: Domains description: Manage domain names x-group: Domains - name: Domain Contacts description: Manage contacts associated with domains x-group: Domains - name: Domain Registrations description: Manage domain registration records x-group: Domains - name: Email Templates description: Manage reusable email templates x-group: Email Templates - name: Files description: Manage file uploads and downloads x-group: Files - name: File Access Links description: Manage shareable file access links x-group: Files - name: Folders description: Organize files into folders x-group: Files - name: Messages description: Manage email messages x-group: Messages - name: Message Attachments description: Access message file attachments x-group: Messages - name: Message Contacts description: View contacts associated with messages x-group: Messages - name: Tasks description: Manage task records x-group: Tasks - name: Task Assignees description: Manage user assignments to tasks x-group: Tasks - name: Task Activity description: View task activity and change history x-group: Tasks paths: /v1/invoices/{id}/line-items: post: tags: - Invoice Line Items summary: Create invoice line item description: Add a line item to a draft invoice. operationId: createInvoiceLineItem parameters: - schema: type: string format: uuid description: Invoice UUID example: 123e4567-e89b-12d3-a456-426614174000 required: true description: Invoice UUID name: id in: path - schema: type: string minLength: 1 maxLength: 255 description: >- Key that makes this request safe to retry. Reuse the same value when retrying a request that may already have succeeded — the original response is replayed with an `Idempotency-Replay: true` header. Use a new value for a new operation. example: 9f8c2b1a-4d3e-4a6b-8c1d-2e3f4a5b6c7d required: false description: >- Key that makes this request safe to retry. Reuse the same value when retrying a request that may already have succeeded — the original response is replayed with an `Idempotency-Replay: true` header. Use a new value for a new operation. name: idempotency-key in: header requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/InvoiceLineItemCreate' responses: '201': description: Invoice line item created successfully headers: X-RateLimit-Limit: schema: type: integer description: Maximum burst of requests the tier allows per minute X-RateLimit-Remaining: schema: type: integer description: Requests remaining in the current window after this request X-RateLimit-Reset: schema: type: integer description: Seconds until the allowance is fully replenished Idempotency-Replay: schema: type: boolean description: >- Present and `true` when this response is a replay of an earlier request with the same Idempotency-Key content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/InvoiceLineItem' meta: type: object properties: pagination: type: object properties: total: type: number limit: type: number offset: type: number hasMore: type: boolean required: - limit - offset - hasMore required: - data '400': description: Invalid input content: application/json: schema: $ref: '#/components/schemas/ApiError' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ApiError' '403': description: Insufficient permissions content: application/json: schema: $ref: '#/components/schemas/ApiError' '404': description: Resource not found content: application/json: schema: $ref: '#/components/schemas/ApiError' '409': description: >- The invoice is no longer editable (error code INVOICE_NOT_EDITABLE), or a request with the same Idempotency-Key is still in progress (error code IDEMPOTENCY_KEY_IN_FLIGHT) content: application/json: schema: $ref: '#/components/schemas/ApiError' '422': description: >- This Idempotency-Key was already used for a different request (error code IDEMPOTENCY_KEY_REUSED) content: application/json: schema: $ref: '#/components/schemas/ApiError' '429': description: Rate limit exceeded for the account tier (error code RATE_LIMITED) headers: X-RateLimit-Limit: schema: type: integer description: Maximum burst of requests the tier allows per minute X-RateLimit-Remaining: schema: type: integer description: Requests remaining in the current window after this request X-RateLimit-Reset: schema: type: integer description: Seconds until the allowance is fully replenished Retry-After: schema: type: integer description: Seconds to wait before the next request will be accepted content: application/json: schema: $ref: '#/components/schemas/ApiError' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ApiError' security: - bearerAuth: [] components: schemas: InvoiceLineItemCreate: type: object properties: description: type: string minLength: 1 quantity: type: string pattern: ^-?(?!0{1,9}(?:\.0{1,4})?$)\d{1,9}(?:\.\d{1,4})?$ unitAmountCents: type: integer minimum: -2147483648 maximum: 2147483647 position: type: integer minimum: 0 maximum: 2147483647 description: >- Zero-based display position. A position after the current end appends the line item. required: - description - quantity - unitAmountCents additionalProperties: false InvoiceLineItem: type: object properties: id: type: string format: uuid createdAt: type: string format: date-time updatedAt: type: string format: date-time deletedAt: type: - string - 'null' format: date-time organizationId: type: string format: uuid invoiceId: type: string format: uuid description: type: string quantity: type: string unitAmountCents: type: integer amountCents: type: integer currency: type: string position: type: integer minimum: 0 maximum: 2147483647 required: - id - createdAt - updatedAt - deletedAt - organizationId - invoiceId - description - quantity - unitAmountCents - amountCents - currency - position ApiError: type: object properties: error: type: object properties: message: type: string code: type: string details: {} required: - message - code required: - error securitySchemes: bearerAuth: type: http scheme: bearer description: API key authentication via Bearer token ````