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OpenAPI Specification

openapi: 3.2.0
info:
  title: Tabs Platform Invoices API
  description: The Tabs Platform API is the public REST API for Tabs (tabs.inc), an AI-native revenue automation platform for B2B companies that unifies billing, collections, ASC 606 revenue recognition, and reporting on top of a contract-driven data model.
  version: '1.0'
  contact:
    name: Tabs
    url: https://tabs.inc
  x-endpointsModeled: true
servers:
- url: https://api.tabsplatform.com
  description: Tabs Platform production API
security:
- apiKeyAuth: []
tags:
- name: Invoices
  description: Itemized requests for payment derived from obligations, with actions and PDF export.
paths:
  /customers/{customerId}/invoices:
    parameters:
    - $ref: '#/components/parameters/CustomerId'
    get:
      operationId: listCustomerInvoices
      tags:
      - Invoices
      summary: List invoices for a customer
      responses:
        '200':
          description: A list of invoices for the customer.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /invoices:
    get:
      operationId: listInvoices
      tags:
      - Invoices
      summary: List invoices
      responses:
        '200':
          description: A list of invoices.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /invoices/{invoiceId}:
    parameters:
    - $ref: '#/components/parameters/InvoiceId'
    get:
      operationId: getInvoice
      tags:
      - Invoices
      summary: Get an invoice
      responses:
        '200':
          description: The requested invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateInvoice
      tags:
      - Invoices
      summary: Update an invoice
      description: Update invoice metadata such as PO number, memo, and external IDs.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Invoice'
      responses:
        '200':
          description: The updated invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /invoices/{invoiceId}/pdf:
    parameters:
    - $ref: '#/components/parameters/InvoiceId'
    get:
      operationId: downloadInvoicePdf
      tags:
      - Invoices
      summary: Download an invoice PDF
      responses:
        '200':
          description: The invoice PDF.
          content:
            application/pdf:
              schema:
                type: string
                format: binary
        '401':
          $ref: '#/components/responses/Unauthorized'
  /invoices/{invoiceId}/actions:
    parameters:
    - $ref: '#/components/parameters/InvoiceId'
    post:
      operationId: performInvoiceAction
      tags:
      - Invoices
      summary: Perform an action on an invoice
      description: Perform a lifecycle action on an invoice, such as finalize, send, void, or mark paid.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                action:
                  type: string
                  enum:
                  - finalize
                  - send
                  - void
                  - mark_paid
      responses:
        '200':
          description: The updated invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Invoice'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    Invoice:
      type: object
      properties:
        id:
          type: string
        customerId:
          type: string
        contractId:
          type: string
        status:
          type: string
        poNumber:
          type: string
        memo:
          type: string
        dueDate:
          type: string
          format: date
        total:
          type: number
        currency:
          type: string
        lineItems:
          type: array
          items:
            $ref: '#/components/schemas/InvoiceLineItem'
    Error:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
    InvoiceLineItem:
      type: object
      properties:
        id:
          type: string
        obligationId:
          type: string
        description:
          type: string
        quantity:
          type: number
        amount:
          type: number
        salesTax:
          type: number
  parameters:
    InvoiceId:
      name: invoiceId
      in: path
      required: true
      schema:
        type: string
    CustomerId:
      name: customerId
      in: path
      required: true
      schema:
        type: string
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: 'API key passed directly in the Authorization header (Authorization: YOUR_API_KEY). Keys are created in the Developers section of the Tabs app and require administrator privileges.'