> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kealinks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Download QR artwork

> Renders the code as SVG, PNG or EPS. The value encoded is the short link, never the destination — that indirection is what lets you repoint print.

Deliberately not gated on billing: a free or cancelled customer can always re-download artwork for a code they already printed.



## OpenAPI

````yaml /openapi.json get /api/links/{id}/qr
openapi: 3.1.0
info:
  title: kealink API
  version: '2026-08-21'
  description: >-
    Permanent link shortening and dynamic QR codes.


    **A code we issue never stops resolving.** Not when the destination changes,
    not

    when a subscription lapses, not when the link is archived. Customers print
    these

    on physical materials, so a dead redirect is a reprint bill. Every design

    decision below follows from that.


    ### Authentication


    Send an API key as `Authorization: Bearer klk_...`. Mint one with

    `POST /api/billing/claim`. Keys are stored hashed and shown exactly once.


    ### Paying as an agent


    You do not need an account. `POST /api/links` with no credentials answers

    `402` with a machine-payment challenge — MPP (`WWW-Authenticate: Payment`)
    and

    x402 (`PAYMENT-REQUIRED`) on the same response. Pay either one, retry, and
    you

    get a permanent link plus an API key to repoint it with later.


    ### Errors


    Always `{ "error": "a sentence" }` with a real status code. `402` means this

    action needs payment — never that existing links stopped working.
  contact:
    name: kealink support
    url: https://kealinks.com
servers:
  - url: https://api.kealinks.com
    description: Production
security: []
tags:
  - name: Links
    description: Create and repoint permanent codes.
  - name: QR codes
    description: Print-ready artwork for a link.
  - name: Analytics
    description: Scans and clicks, by day, country, device or referrer.
  - name: Domains
    description: Serve your codes on your own hostname.
  - name: Account
    description: Tier, quota and what this account may do.
  - name: Billing
    description: Subscription lifecycle.
  - name: Team
    description: Workspaces and members.
  - name: Machine payments
    description: Buy a permanent link with no account, over MPP or x402. Built for agents.
  - name: Meta
    description: Discovery and health.
paths:
  /api/links/{id}/qr:
    get:
      tags:
        - QR codes
      summary: Download QR artwork
      description: >-
        Renders the code as SVG, PNG or EPS. The value encoded is the short
        link, never the destination — that indirection is what lets you repoint
        print.


        Deliberately not gated on billing: a free or cancelled customer can
        always re-download artwork for a code they already printed.
      operationId: getLinkQr
      parameters:
        - name: id
          in: path
          required: true
          description: The link id returned when the link was created.
          schema:
            type: string
            examples:
              - lnk_2YgQk1p8fT3mN7wCxRvBdLsHjZa
        - name: format
          in: query
          required: false
          description: svg (default), png, or eps.
          schema:
            type: string
            enum:
              - svg
              - png
              - eps
            default: svg
        - name: size
          in: query
          required: false
          description: Pixel size, 32-4096. Ignored for EPS.
          schema:
            type: integer
            minimum: 32
            maximum: 4096
        - name: ec
          in: query
          required: false
          description: >-
            Error correction: L, M (default), Q or H. Forced to H when a logo is
            set.
          schema:
            type: string
            enum:
              - L
              - M
              - Q
              - H
        - name: fg
          in: query
          required: false
          description: Foreground colour.
          schema:
            type: string
        - name: bg
          in: query
          required: false
          description: Background colour.
          schema:
            type: string
      responses:
        '200':
          description: The artwork.
          content:
            image/svg+xml:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            application/postscript:
              schema:
                type: string
                format: binary
        '400':
          description: The request body or query string did not validate.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Missing or invalid credentials.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: No link with that id on this account.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearerAuth: []
components:
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
          description: A sentence you can show a human. Never a code to switch on.
          examples:
            - Your subscription is inactive. Existing links keep resolving.
      required:
        - error
      additionalProperties: false
      description: >-
        Every failure returns this shape with a real status code. 402
        specifically means 'inactive subscription, existing links still work' —
        the message says so.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        An API key (`klk_...`) or a Clerk session token. Both resolve to the
        same account and behave identically.

````