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OpenAPI Specification

openapi: 3.2.0
info:
  contact:
    name: Alder
    url: https://meetalder.com
  description: 'No account or key. `POST /api/v1/drafts` returns the totals and `builderUrl`, which opens the invoice filled in, ready to download as a PDF. All money is integer minor units (cents): 12.50 USD is 1250.


    MCP: the same as the `draft_invoice` tool over Streamable HTTP at `https://alderinvoices.com/mcp`.'
  summary: 'Free AI invoice generator: price an invoice and get a prefilled link to download it as a PDF.'
  title: AI Invoice Generator API (by Alder) PDF API
  version: 1.0.0
servers:
- url: https://alderinvoices.com
tags:
- name: PDF
paths:
  /api/v1/pdf:
    post:
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PDFInput'
        required: true
      responses:
        '200':
          content:
            application/pdf:
              schema:
                format: binary
                type: string
          description: Success
        '400':
          description: Invalid input
        '429':
          description: Rate limit exceeded
      security: []
      summary: Render an invoice PDF
      tags:
      - PDF
      operationId: postApiV1Pdf
      x-operation-id-source: derived
components:
  schemas:
    Party:
      properties:
        address:
          description: Multi-line postal address
          maxLength: 500
          type: string
        email:
          format: email
          type: string
        name:
          maxLength: 200
          type: string
      type: object
    PDFInput:
      description: Direct PDF input. Western European (Windows-1252) text only, no logos, no payment ledger. Unknown text is rejected, never silently replaced.
      properties:
        billTo:
          $ref: '#/components/schemas/Party'
          description: The customer. name is required; email is prefilled at checkout.
        currency:
          default: usd
          enum:
          - usd
          - cad
          - eur
          - gbp
          - aud
          - nzd
          type: string
        discount:
          description: Minor units, taken off the subtotal
          minimum: 0
          type: integer
        dueDate:
          description: YYYY-MM-DD. The invoice reads overdue the day after.
          format: date
          type: string
        from:
          $ref: '#/components/schemas/Party'
          description: The business sending the invoice.
        issueDate:
          description: YYYY-MM-DD
          format: date
          type: string
        items:
          items:
            $ref: '#/components/schemas/LineItem'
          maxItems: 100
          minItems: 1
          type: array
        notes:
          maxLength: 2000
          type: string
        number:
          description: Your invoice number, e.g. INV-1042
          maxLength: 40
          type: string
        shipTo:
          $ref: '#/components/schemas/Party'
          description: Optional shipping address
        shipping:
          description: Minor units, added after tax
          minimum: 0
          type: integer
        taxRate:
          description: Percent. Applied after discount, not to shipping.
          maximum: 100
          minimum: 0
          type: number
        terms:
          maxLength: 2000
          type: string
      required:
      - from
      - billTo
      - number
      - issueDate
      - dueDate
      - items
      type: object
    LineItem:
      properties:
        description:
          maxLength: 500
          type: string
        quantity:
          description: May be fractional, e.g. 1.5 hours
          minimum: 0
          type: number
        unitPrice:
          description: Minor units (cents)
          minimum: 0
          type: integer
      required:
      - description
      - quantity
      - unitPrice
      type: object