# Tech Stack Detector + robots.txt AI Bot Blocking Check (`appetizing_horsefly/tech-stack-robots-checker`) Actor

Detect what any website is built with (e-commerce platform, CMS, framework, analytics, ad pixels, chat, payments, CDN) and analyze its robots.txt, including which AI crawlers such as GPTBot and ClaudeBot it blocks. Bulk domains; unreachable ones are free.

- **URL**: https://apify.com/appetizing_horsefly/tech-stack-robots-checker.md
- **Developed by:** [GM Labs](https://apify.com/appetizing_horsefly) (community)
- **Categories:** SEO tools, Lead generation, Developer tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$2.00 / 1,000 domains

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

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

## Website Tech Stack and robots.txt Checker: Shopify, WordPress, analytics, AI bot blocking

**Find out what any website is built with, and what its robots.txt allows, in bulk.** For each domain you get the e-commerce platform, CMS, framework, analytics, tag managers, ad pixels, marketing automation, chat, payments, consent tools, CDN and hosting. You also get the robots.txt analysis: declared sitemaps, Disallow rules, and **which AI crawlers (GPTBot, ClaudeBot, CCBot, Google-Extended, PerplexityBot, Bytespider and more) are blocked**.

Use it for **B2B lead generation and list segmentation** (for example, all Shopify stores using Klaviyo), **sales prospecting for agencies and SaaS, competitor research, SEO audits, and AI-crawler policy research**.

### Features

- 90+ technology signatures across HTML, headers and cookies.
- robots.txt parsing with the standard robots-parser: AI-bot allow/block matrix, sitemaps, crawl-delay.
- Security headers (HSTS, CSP), redirects, title, meta description, language.
- **No charge for unreachable sites.** They are listed in `SUMMARY`. If all domains fail, the run fails loudly.
- **Dedupe**: `www.` and non-www are treated as the same domain.
- **Hard caps**: `maxDomains`, per-request timeouts, retries, and a concurrency limit.
- Collects no personal data: no emails or names, only public technical signals.

### Use cases

- **Lead generation:** filter a list of domains down to Shopify or WordPress stores that use (or don't use) a given tool.
- **Competitor tracking:** see when a competitor switches platform or adds a new analytics, chat or A/B tool.
- **AI crawler research:** check which sites block GPTBot, ClaudeBot, CCBot and other AI crawlers in robots.txt.
- **Agency audits:** quick tech and robots.txt audit for a prospect list before outreach.

### Try it free in 1 click

The input form is **prefilled with a small, working example**. Press **Start** without changing anything: the run detects the tech stack and AI-bot robots.txt rules of allbirds.com and apify.com. Our test run of exactly this input finished in about 3 seconds with 2 results. At list price that is about $0.00, which fits inside the free monthly credit of Apify's free plan. Then swap in your own values.

Prefilled input:

```json
{
  "domains": [
    "https://www.allbirds.com",
    "apify.com"
  ]
}
```

### Sample output

Real rows from the prefilled run on 2026-10-14 (2 of 2 results shown; long fields trimmed). Download the full dataset as JSON, CSV or Excel.

| domain | httpStatus | cms | ecommercePlatform | technologies | technologyCount | aiBotsBlocked | blocksAllAiBots |
|---|---|---|---|---|---|---|---|
| apify.com | 200 | HubSpot CMS | – | HubSpot CMS, Next.js, Bootstrap (+16) | 19 | none | no |
| allbirds.com | 200 | – | Shopify | Shopify, Google Tag Manager, Microsoft Clarity (+4) | 7 | none | no |

### Input (copy-paste)

```json
{
  "domains": ["https://www.allbirds.com", "apify.com", "https://www.nytimes.com"],
  "checkRobots": true,
  "detectTech": true,
  "maxDomains": 1000
}
```

### API (copy-paste)

```bash
curl -X POST "https://api.apify.com/v2/acts/appetizing_horsefly~tech-stack-robots-checker/run-sync-get-dataset-items?token=$APIFY_TOKEN" \
  -H 'Content-Type: application/json' -d '{"domains":["allbirds.com","apify.com"]}'
```

### Output

```json
{"domain":"allbirds.com","ecommercePlatform":"Shopify","technologies":["Shopify","Google Tag Manager","Klaviyo","Cloudflare"],"robotsTxtFound":true,"sitemaps":["https://www.allbirds.com/sitemap.xml"],"aiBotsBlocked":["GPTBot","CCBot"],"httpStatus":200}
```

### Full JSON of one result (real run)

```json
{
  "domain": "apify.com",
  "inputUrl": "https://apify.com/",
  "finalUrl": "https://apify.com/",
  "httpStatus": 200,
  "https": true,
  "redirected": false,
  "title": "Apify: Marketplace of ready-to-run tools for AI",
  "metaDescription": "Thousands of tools to automate your business. Get real-time web data, track competitors, generate leads, and integrate your apps and AI agents.",
  "language": "en",
  "server": null,
  "poweredBy": null,
  "generator": null,
  "hsts": true,
  "csp": true,
  "htmlBytes": 497554,
  "technologies": [
    "HubSpot CMS",
    "Next.js",
    "Bootstrap"
  ],
  "techByCategory": {
    "cms": [
      "HubSpot CMS"
    ],
    "framework": [
      "Next.js"
    ],
    "library": [
      "Bootstrap"
    ],
    "analytics": [
      "Google Analytics",
      "Segment",
      "Mixpanel"
    ],
    "tag-manager": [
      "Google Tag Manager"
    ],
    "advertising": [
      "LinkedIn Insight",
      "TikTok Pixel",
      "Google Ads"
    ],
    "marketing": [
      "HubSpot"
    ],
    "chat": [
      "Intercom"
    ],
    "consent": [
      "OneTrust"
    ],
    "cdn": [
      "Cloudflare",
      "Amazon CloudFront"
    ],
    "monitoring": [
      "Sentry"
    ],
    "search": [
      "Algolia"
    ],
    "fonts": [
      "Google Fonts"
    ]
  },
  "ecommercePlatform": null,
  "cms": "HubSpot CMS",
  "technologyCount": 19,
  "robotsTxtFound": true,
  "robotsStatus": 200,
  "robotsSizeBytes": 174,
  "sitemaps": [
    "https://apify.com/sitemap.xml"
  ],
  "userAgentsListed": [
    "*"
  ],
  "disallowRuleCount": 0,
  "allBotsBlockedFromHome": false,
  "googlebotAllowedHome": true,
  "aiBotsBlocked": [],
  "aiBotsAllowed": [
    "GPTBot",
    "ChatGPT-User",
    "OAI-SearchBot"
  ],
  "blocksAllAiBots": false,
  "crawlDelay": null,
  "checkedAt": "2026-10-12T17:48:26.489Z"
}
```

### Pricing

Pay per event: **$0.002 per domain checked** ($2 per 1,000). Unreachable domains and duplicates are free.

### Notes

Detection is signature-based, from the homepage only. It can miss tools that load late or only on other pages. Sites behind heavy bot protection may return limited data, and those rows carry a `warning`.

### Use it as an MCP tool (Claude, Cursor, ChatGPT, any AI agent)

This Actor works as a tool in the [Apify MCP server](https://mcp.apify.com), so an AI agent can call it directly and you pay per result, the same as a normal run. Add this server URL to any MCP client:

```
https://mcp.apify.com/?tools=appetizing_horsefly/tech-stack-robots-checker
```

Sign in with your Apify account (or pass your Apify API token as a Bearer header). The agent reads the input fields above from the Actor's input schema. Example request to the agent: "Which of these 20 competitor domains run Shopify, and which block GPTBot in robots.txt?"

### Support

Questions, a bug, or a data source you need? Use this Actor's **Issues** tab or email **gm-labs@mail.grokbot.com**. Built and maintained by GM Labs.

# Actor input Schema

## `domains` (type: `array`):

Websites to check, e.g. shopify.com or https://www.allbirds.com. Duplicates (incl. www/non-www) are removed.

## `checkRobots` (type: `boolean`):

Fetch robots.txt: sitemaps, disallow rules, and which AI crawlers (GPTBot, ClaudeBot, CCBot, Google-Extended, PerplexityBot...) are blocked.

## `detectTech` (type: `boolean`):

Detect CMS, e-commerce platform, analytics, tag managers, CDN, frameworks, chat and marketing tools from the homepage HTML, headers and cookies.

## `maxDomains` (type: `integer`):

Stop after this many checked domains; you are never billed for more. 0 = no cap.

## `concurrency` (type: `integer`):

Domains checked in parallel.

## `requestTimeoutSecs` (type: `integer`):

Per-request timeout; retried twice.

## Actor input object example

```json
{
  "domains": [
    "https://www.allbirds.com",
    "apify.com"
  ],
  "checkRobots": true,
  "detectTech": true,
  "maxDomains": 1000,
  "concurrency": 10,
  "requestTimeoutSecs": 20
}
```

# Actor output Schema

## `results` (type: `string`):

All results in the default dataset

## `summary` (type: `string`):

Counts, caps hit, errors

# 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 = {
    "domains": [
        "https://www.allbirds.com",
        "apify.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("appetizing_horsefly/tech-stack-robots-checker").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 = { "domains": [
        "https://www.allbirds.com",
        "apify.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("appetizing_horsefly/tech-stack-robots-checker").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 '{
  "domains": [
    "https://www.allbirds.com",
    "apify.com"
  ]
}' |
apify call appetizing_horsefly/tech-stack-robots-checker --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,appetizing_horsefly/tech-stack-robots-checker"
        }
    }
}
```

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/l5dLxkQM37VRDRHe1/builds/3eQJIgDGX7iPhz4JQ/openapi.json