openapi: 3.2.0
info:
  title: DELTA Witness — Trust Layer for Autonomous Actions Demo API
  version: 0.7.0
  description: Browser verification and page-state proof for public sources, plus deterministic preflight checks before an autonomous action. DELTA proves observation and change, not truth.
  contact:
    name: DELTA Witness
    email: ruphussten@163.com
    url: https://delta-witness-api.ruphussten.workers.dev/docs
  x-guidance: Call GET /v1/quote before budgeting. Capture preserves a public observation; Guard compares one with deterministic expectations; Guarded-Action Pilot bundles 1-3 public URL proofs for exactly $10. Runtime HTTP 402 payment requirements are authoritative.
servers:
- url: https://delta-witness-api.ruphussten.workers.dev
tags:
- name: Demo
paths:
  /v1/demo:
    get:
      operationId: getDemoProof
      security: []
      responses:
        '200':
          description: Known free proof example
      tags:
      - Demo
      summary: Get demo proof
      x-summary-source: derived