{
  "openapi": "3.1.0",
  "info": { "title": "FirstPass Memo listing check", "version": "1.0.0",
    "description": "Red-flag check for small online-business listings (Flippa, Empire Flippers, Acquire.com, brokers). Returns payback, asking multiple vs comparable listings, flags with seller questions. Stateless, free, no key. Screening only, not advice.",
    "contact": { "email": "hello@firstpassmemo.com", "url": "https://firstpassmemo.com/" } },
  "servers": [{ "url": "https://firstpassmemo.com" }],
  "paths": {
    "/api/check": { "post": { "operationId": "checkListing", "summary": "Check a business-for-sale listing for red flags",
      "requestBody": { "required": true, "content": { "application/json": { "schema": { "type": "object", "properties": {
        "listing_text": { "type": "string", "description": "Listing text pasted by the user. Max 20,000 characters." },
        "asking_price": { "type": "number" }, "monthly_profit": { "type": "number" }, "monthly_revenue": { "type": "number" },
        "age_months": { "type": "number" }, "category": { "type": "string" }, "traffic_sources": { "type": "string" } } } } } },
      "responses": { "200": { "description": "Check result: payback_months, annual_multiple, benchmark, flags[], questions_for_seller[], disclaimer" } } } }
  }
}