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OpenAPI Specification

openapi: 3.2.0
info:
  title: Rendlet PDF API
  version: 0.1.0
  description: 'Render PDFs from HTML (headless Chromium) or from JSON + a built-in template (invoice, itinerary). Auth: Authorization: Bearer . Get a free key via POST /v1/signup. Public test key: sandbox (5 renders/IP/day, 1 page, 50 KB HTML, watermarked).'
servers:
- url: https://rendlet.com
security:
- bearer: []
- apiKey: []
tags:
- name: PDF
paths:
  /v1/pdf:
    post:
      operationId: renderPdf
      summary: Render a PDF from HTML or from JSON + template
      requestBody:
        required: true
        content:
          application/json:
            schema:
              oneOf:
              - $ref: '#/components/schemas/HtmlRequest'
              - $ref: '#/components/schemas/TemplateRequest'
            examples:
              html:
                value:
                  html: <h1>Hello</h1><p>Rendered by Rendlet.</p>
                  options:
                    format: A4
              invoice:
                value:
                  template: invoice
                  data:
                    number: INV-1001
                    currency: USD
                    seller:
                      name: Acme Studio
                    buyer:
                      name: Globex
                    items:
                    - description: Design
                      qty: 1
                      unit_price: 500
                    tax_rate: 0.1
      responses:
        '200':
          description: 'PDF (binary) or JSON with base64 when response=base64. Headers: X-Pages, X-Plan, X-Quota-Limit, X-Quota-Remaining.'
          content:
            application/pdf:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/Base64Response'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Missing API key
        '403':
          description: Invalid API key
        '413':
          description: HTML too large or too many pages for plan
        '429':
          description: Monthly quota exceeded
        '500':
          description: Render failed
      tags:
      - PDF
components:
  schemas:
    TemplateRequest:
      type: object
      required:
      - template
      - data
      properties:
        template:
          type: string
          enum:
          - invoice
          - itinerary
        data:
          type: object
          description: Template fields; see GET /v1/templates for full examples.
        filename:
          type: string
        response:
          type: string
          enum:
          - binary
          - base64
          default: binary
    HtmlRequest:
      type: object
      required:
      - html
      properties:
        html:
          type: string
          maxLength: 2000000
          description: 'Full HTML document. JavaScript is disabled; only data: and public https: assets load.'
        options:
          type: object
          properties:
            format:
              type: string
              enum:
              - A4
              - Letter
              - Legal
              - A3
              - A5
              default: A4
            landscape:
              type: boolean
              default: false
            margin:
              type: string
              default: 12mm
              description: CSS length applied to all sides
            printBackground:
              type: boolean
              default: true
        filename:
          type: string
        response:
          type: string
          enum:
          - binary
          - base64
          default: binary
    Base64Response:
      type: object
      properties:
        filename:
          type: string
        pages:
          type: integer
        bytes:
          type: integer
        content_type:
          type: string
        base64:
          type: string
    Error:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
        hint:
          type: string
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
    apiKey:
      type: apiKey
      in: header
      name: X-API-Key