# Browser Fingerprint Behavior Auditor (`bakos_bence/fingerprint-auditor`) Actor

Open a URL in Chromium and report fingerprinting APIs, bot vendors, cookies, and sensor POSTs — with a human REPORT.md and an agent-ready path plan. Observation only; not a bypass. Unofficial.

- **URL**: https://apify.com/bakos\_bence/fingerprint-auditor.md
- **Developed by:** [Bakos Bence](https://apify.com/bakos_bence) (community)
- **Categories:** Developer tools, AI, Other
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $7.50 / 1,000 results

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.
Since this Actor supports Apify Store discounts, the price gets lower the higher subscription plan you have.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.

Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For examples already wired to this Actor's own input schema, see the [API](#api) section below.

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).

# README

### What does Browser Fingerprint Behavior Auditor do?

**Example:** Browser Fingerprint Behavior Auditor · https://fingerprint.com/demo/

**Try it:** Press **Start** on the prefilled input below — defaults are ready for a first run.

| Field | What you get |
|---|---|
| `httpStatus` | 403 |
| `path` | cookie\_wall |
| `confidence` | high |
| `agent` | {jsRan: true, webdriverRead: true, botCookieNames: \_pxhd, \_pxvid, \_px... |
| `vendors` | perimeterx |
| `host` | example.com |
| `url` | https://example.com/item/123 |
| `librariesDetected` | item-a, item-b |
| `fingerprintScore` | 4.6 |
| `do` | item-a, item-b |
| `dont` | item-a, item-b |
| `nextSteps` | item-a, item-b |
| `verdict` | Example verdict |
| `categories` | Example categories |
| `elapsedMs` | 95 |
| `finalUrl` | https://example.com/item/123 |
| `title` | Example jacket |
| `ok` | true |
| `eventCount` | 128 |
| `uniqueApis` | Example unique Apis |
| `topApis` | item-a, item-b |
| `topScripts` | item-a, item-b |
| `canvasSamples` | item-a, item-b |
| `canvasFillTexts` | item-a, item-b |
| `reportMarkdown` | Example report Markdown |
| `auditedAt` | 2026-09-24T12:00:00.000Z |

**Cost:** Apify’s **Free** plan includes monthly platform credit. Open this Actor’s **Pricing** tab for current pay-per-event rates (no guesswork in the README).

![Example input form](assets/fingerprint-auditor-input-screenshot.png)

![Example dataset preview](assets/fingerprint-auditor-dataset-screenshot.png)

Press **Start**. The example is already filled in.

Paste a URL that **403s or feels fingerprinted**. The Actor opens it in Chromium, hooks fingerprinting Web APIs **before** page scripts run, watches bot **collectors / cookies**, and returns a **dual output**:

1. **Human report** — KV `REPORT.md` (Verdict · Do · Don't · Evidence · Catalog candidates)
2. **Agent / MCP plan** — dataset field `agent` (and flat `path` / `do` / `dont` / `nextSteps`). Switch on `path`; do not parse the prose.

**Paths:** `ignore_for_scraping` · `blocked_before_js` · `interactive_challenge` · `cookie_wall` · `browser_then_find_api` · `try_tls_client`

**Observation only.** This is a recon / reverse-engineering aid — not a bypass tool. Unofficial; not affiliated with FingerprintJS, PerimeterX, Akamai, DataDome, Cloudflare, or any anti-bot vendor.

#### How to fill the form (first run)

| Field | What to enter |
|-------|----------------|
| **Page URLs to audit** | Leave the FingerprintJS demo for a sample, or paste HTTPS URLs that 403 / feel fingerprinted |
| **Wait after page load** | Default 5000 ms — increase if scripts load slowly |
| **Max API hook events** | Default 2500 — lower only if the run feels too heavy |
| **Save full event log** | Off for normal use; on when you need raw hook output in KV |
| **Max URL results** | 1 for smoke; raise when auditing multiple pages |
| **Proxy** | Leave default (off) unless you need Apify datacenter egress |

#### How to run

1. Open this Actor in [Apify Console](https://console.apify.com/).
2. Click **Start** on the prefilled FingerprintJS demo (or paste your own URLs).
3. Read the dataset row (`path`, `agent`, `do` / `dont`) and open KV **`REPORT.md`** for the human write-up.
4. Export JSON/CSV via the Apify API.

```json
{
  "urls": ["https://fingerprint.com/demo/"],
  "waitMs": 5000,
  "maxEvents": 2500,
  "includeEvents": false,
  "maxItems": 1
}
```

#### Sample output (agent fields)

```json
{
  "path": "cookie_wall",
  "confidence": "high",
  "vendors": ["perimeterx"],
  "httpStatus": 403,
  "agent": {
    "jsRan": true,
    "webdriverRead": true,
    "botCookieNames": ["_pxhd", "_pxvid", "_px2"],
    "sensor": {
      "method": "POST",
      "url": "https://example.com/…/xhr/assets/js/bundle",
      "fieldNames": ["payload", "appId", "pxhd"]
    },
    "do": ["Record bot vendor, cookie names, and sensor field names"],
    "dont": ["Clone canvas/WebGL to beat the wall"],
    "nextSteps": ["browser_session_then_sniff_catalog_xhr"]
  }
}
```

#### How much does it cost?

**Pay per event (PPE):** Actor start + each **result** row (one URL audit). See the Pricing tab. Browser runs use ~2 GB memory — price covers platform usage.

#### Related Actors

| Actor | When to use |
|-------|-------------|
| [GEO & AI Agent Readiness Audit](https://apify.com/bakos_bence/geo-agent-readiness-audit) | Site readiness scores + keep/change/missing report |
| [Chrome Extension Permission Diff Monitor](https://apify.com/bakos_bence/chrome-extension-permission-monitor) | CRX permission baselines and diffs |
| [SSL Certificate Expiry Monitor](https://apify.com/bakos_bence/ssl-certificate-monitor) | TLS expiry / issuer checks |

#### Export to Power BI, Tableau, Looker Studio & Qlik

Use the dataset items API URL from the run. Authenticate with your Apify API token.

#### FAQ

##### Is this a bot bypass?

No. It reports what the page probed and which bot vendor/cookies/sensors appeared. It does not solve challenges or forge cookies.

##### Can AI agents use the output?

Yes. Switch on `agent.path` and follow `do` / `dont` / `stopConditions`. Full markdown stays in `REPORT.md` for humans.

**Dashboards:** connect **Power BI**, **Tableau**, **Looker Studio**, or **Qlik** to the dataset API. **AI agents:** paste this Actor’s Store page URL into an Apify-capable agent (MCP / Claude / Cursor with Apify).

# Actor input Schema

## `urls` (type: `array`):

One HTTPS URL per line. Use the prefilled demo to see a sample report, or paste pages that block bots / show cookie walls.

## `waitMs` (type: `integer`):

Extra milliseconds after load so async fingerprint scripts can run before the hook log is captured. Default 5000 is fine for most pages.

## `maxEvents` (type: `integer`):

Cap hooked browser API calls per page. Leave at 2500 unless the page is extremely noisy.

## `includeEvents` (type: `boolean`):

When on, writes the raw API call log to the key-value store (<code>EVENTS\_N</code>). Dataset rows stay summary-sized either way.

## `maxItems` (type: `integer`):

How many URL summary rows to charge and return. Keep at 1 for a smoke run; raise when auditing several pages in one run.

## `proxyConfiguration` (type: `object`):

Optional. Leave off for direct Chromium (default). If enabled, Actor forces Apify datacenter groups — not Residential.

## Actor input object example

```json
{
  "urls": [
    "https://fingerprint.com/demo/"
  ],
  "waitMs": 5000,
  "maxEvents": 2500,
  "includeEvents": false,
  "maxItems": 1,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

# Actor output Schema

## `overview` (type: `string`):

Default dataset items (agent path + evidence).

## `reportMarkdown` (type: `string`):

Human-readable Verdict / Do / Don't report.

## `agentPlan` (type: `string`):

Compact MCP-oriented agent payload.

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "urls": [
        "https://fingerprint.com/demo/"
    ],
    "waitMs": 5000,
    "maxEvents": 2500,
    "includeEvents": false,
    "maxItems": 1,
    "proxyConfiguration": {
        "useApifyProxy": false
    }
};

// Run the Actor and wait for it to finish
const run = await client.actor("bakos_bence/fingerprint-auditor").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {
    "urls": ["https://fingerprint.com/demo/"],
    "waitMs": 5000,
    "maxEvents": 2500,
    "includeEvents": False,
    "maxItems": 1,
    "proxyConfiguration": { "useApifyProxy": False },
}

# Run the Actor and wait for it to finish
run = client.actor("bakos_bence/fingerprint-auditor").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "urls": [
    "https://fingerprint.com/demo/"
  ],
  "waitMs": 5000,
  "maxEvents": 2500,
  "includeEvents": false,
  "maxItems": 1,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}' |
apify call bakos_bence/fingerprint-auditor --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,bakos_bence/fingerprint-auditor"
        }
    }
}
```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/hhjajunFdzYOYhIK2/builds/YxHyAxQhUTTeuo7ch/openapi.json