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OpenAPI Specification

openapi: 3.2.0
info:
  title: Quartermaster Qr API
  version: 1.6.0
  description: Small, reliable utility APIs for AI agents. Paid endpoints charge per call in USDC over the x402 protocol (HTTP 402 flow) - no accounts, no API keys. Free endpoints are open.
  contact:
    url: https://quartermaster.surewhynot.app
servers:
- url: https://quartermaster.surewhynot.app
tags:
- name: QR
paths:
  /v1/qr:
    get:
      summary: Generate a QR code
      parameters:
      - name: data
        in: query
        required: true
        description: Content to encode (max 2048 chars)
        schema:
          type: string
      - name: format
        in: query
        required: false
        description: svg (default) or text (terminal block art)
        schema:
          type: string
          enum:
          - svg
          - text
      - name: ecc
        in: query
        required: false
        description: Error-correction level
        schema:
          type: string
          enum:
          - L
          - M
          - Q
          - H
          default: M
      responses:
        '200':
          description: QR code as image/svg+xml or text/plain
        '400':
          description: Invalid input
          content:
            application/json:
              schema:
                type: object
        '402':
          description: Payment required
          content:
            application/json:
              schema:
                type: object
      x-payment:
        protocol: x402
        price: $0.002
        currency: USDC
        note: Unpaid requests receive 402 Payment Required with machine-readable payment requirements.
      tags:
      - QR
      operationId: getV1Qr
      x-operation-id-source: derived
externalDocs:
  description: 'Buyer quickstart: how to pay with x402'
  url: https://quartermaster.surewhynot.app/buyers