How does Warnvo scan bills?

Take a photo of any bill — hotel, medical, restaurant, contractor — and Warnvo's AI analyzes it in seconds. It identifies overcharges, junk fees, and illegal charges, then generates a ready-to-send dispute letter.

What languages does Warnvo support?

Warnvo works in 95 languages. You can scan bills in any language — Japanese, Arabic, Spanish, Portuguese, French, German, Thai, and 87 more — and receive results in your preferred language.

Can Warnvo detect scam texts and emails?

Yes. Warnvo's Scam Detector analyzes text messages, emails, and phishing links before you click. It catches fake FedEx texts, fake bank alerts, IRS scams, and smishing attempts.

Is Warnvo different from ChatGPT?

Yes. Warnvo is trained specifically on consumer protection law — not general knowledge. It knows the specific laws, regulations, and consumer rights that apply to your situation, and generates legally-grounded dispute letters you can actually send.

How much does Warnvo cost?

Warnvo offers a free tier with 3 scans per day. Pro is $19.99/month or $149.99/year for unlimited scans. Family Shield covers up to 6 people for $14.99/month.

Can Warnvo help with medical bills?

Yes. Warnvo's Medical Bill Analyzer identifies billing errors, upcoding, duplicate charges, and services never rendered. It generates a dispute letter referencing the specific billing codes and regulations that apply.

Scan Any Bill. Catch Junk Fees. Generate Dispute Letters Instantly.

Warnvo is the world's first AI consumer protection app. Snap a photo of any bill — hotel, medical, restaurant, contractor, auto repair — and Warnvo's AI analyzes every line item in seconds. It flags overcharges, junk fees, and illegal charges, then generates a ready-to-send dispute letter. Works in 95 languages across any country.

34 Specialized AI Tools for Consumer Protection

Hotel Bill Analyzer, Medical Bill Checker, Restaurant Receipt Scanner, Auto Repair Bill Analyzer, Contractor Bill Checker, Scam Detector, SMS Scam Detector, Phishing Email Detector, QR Code Scanner, Lease Analyzer, Bank Fee Analyzer, Insurance Claim Analyzer, Medicare Bill Checker, Paycheck Stub Analyzer, Credit Report Analyzer, Student Loan Analyzer, Gig Worker Fee Analyzer, HOA Fee Analyzer, Utility Bill Checker, Security Deposit Dispute, Prescription Price Checker, Timeshare Exit Advisor, Crypto Scam Detector, Dark Pattern Detector, Fake Job Offer Detector, Subscription Tracker, Negotiation Script Generator, Price Drop Tracker, Return Policy Analyzer, Warranty Tracker, Tip Fraud Detector, Delivery Scam Detector, Before You Sign Contract Analyzer, Junk Fee Calculator.

How Warnvo Works

Step 1: Take a photo of your bill or paste the text. Step 2: Warnvo's AI analyzes every line item against fair market rates and consumer protection law. Step 3: Get a full report flagging suspicious charges. Step 4: Download a ready-to-send dispute letter referencing the exact laws that protect you.

Works in Any Language, Any Country

Warnvo reads bills in Japanese, Spanish, French, German, Portuguese, Italian, Arabic, Thai, Chinese, Korean, and 85 more languages. Whether you're disputing a hotel fee in Tokyo, a restaurant charge in Rome, or a medical bill in the United States, Warnvo applies local market benchmarks and the consumer protection laws that apply to your situation.

Dispute Hotel Bills, Medical Bills, and More

Hotel junk fees — resort fees, destination fees, amenity fees — are among the most common consumer complaints. Warnvo's Hotel Bill Analyzer flags every suspicious charge and generates a dispute letter you can hand to the front desk or send to the hotel's billing department. Medical bill errors affect 1 in 5 patients. Warnvo's Medical Bill Checker identifies upcoding, duplicate charges, and services never rendered.

Developer API

Warnvo API Reference

Embed ShieldEngine™ bill analysis directly into your platform. Submit bills via REST, get back structured JSON with flagged items, overcharge estimates, and dispute recommendations.

Jump to endpoints

Overview

REST + JSON

Standard HTTP. Multipart for file uploads, JSON for everything else.

ShieldEngine™

Same AI that powers the Warnvo consumer app — now available via API.

Async by default

POST /scan returns a jobId. Poll GET /jobs/:id or use webhooks.

Base URL

https://warnvo.com/api/v1

Authentication

All API requests require a Bearer token in the Authorization header. Generate keys from your Account page under API Access.

http

Authorization: Bearer wv_live_YOUR_KEY

Security note

Keys are shown only once at creation time. Store them in environment variables — never in client-side code or version control.

Endpoints

Response Schema

All responses are JSON. The result field is populated once status === "done".

json

{
  "jobId": 42,
  "status": "done",
  "scansRemaining": 487,
  "result": {
    "verdict": "FLAGGED",
    "overchargeEstimate": 47.50,
    "flaggedItems": [
      {
        "item": "Resort fee",
        "amount": 35.00,
        "issue": "Not disclosed at booking",
        "severity": "high"
      }
    ],
    "summary": "Hotel bill contains 1 undisclosed fee totalling $35.",
    "disputeRecommended": true
  }
}

Verdict values

FLAGGED

Overcharges or suspicious items detected. Dispute recommended.

HEADS_UP

Minor issues found. Review before paying.

LOOKS_OK

No significant issues detected.

Errors

Errors follow a consistent shape: { error: string, code: string }.

HTTP Status	Code	Meaning
401	UNAUTHORIZED	Missing or invalid API key.
403	REVOKED	API key has been revoked.
429	RATE_LIMITED	Scan quota exhausted for this billing period.
400	NO_FILE	No file attached to the request.
400	FILE_TOO_LARGE	File exceeds 10 MB limit.
404	JOB_NOT_FOUND	Job ID does not exist or belongs to another key.
500	ENGINE_ERROR	ShieldEngine™ encountered an internal error. Retry after a moment.

JavaScript Example

javascript

const form = new FormData();
form.append("file", fs.createReadStream("bill.pdf"));
form.append("category", "hotel");

const res = await fetch("https://warnvo.com/api/v1/scan", {
  method: "POST",
  headers: { Authorization: "Bearer wv_live_YOUR_KEY" },
  body: form,
});

const { jobId, status, result } = await res.json();
// status: "queued" | "processing" | "done" | "error"
// result: populated when status === "done"

API Pricing

API access is billed separately from Warnvo consumer subscriptions. All plans include full ShieldEngine™ accuracy, JSON responses, and email support.

Starter

$79/mo

500 scans/mo

Full ShieldEngine™ analysis
All bill categories
JSON responses
Email support

Warnvo — ShieldEngine™ Consumer Protection | Scan Bills & Fight Fraud