# Technology Stack Change Monitor (`silicon1235/technology-stack-change-monitor`) Actor

Detect website technologies and monitor added, removed, and version-changed CMS, frameworks, analytics, hosting, CDN, and infrastructure signals.

- **URL**: https://apify.com/silicon1235/technology-stack-change-monitor.md
- **Developed by:** [X L](https://apify.com/silicon1235) (community)
- **Categories:** Developer tools, Automation, Business
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

Pay per usage

This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have.

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

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
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.
Actors are written with capital "A".

## 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.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Technology Stack Change Monitor

Detect the technologies used by public websites and compare them with a saved snapshot. The Actor reports added and removed technologies, version changes, confidence evidence, redirects, and selected response headers without launching a browser or proxy.

### Outputs

- One dataset row per requested website.
- `SUMMARY`: aggregate counts for baselines, changes, errors, and signals.
- `CHANGES`: changed websites only.
- `SNAPSHOTS`: current snapshots for explicit reuse.
- `REPORT`: Markdown summary for alerts and operations workflows.

### Monitoring workflow

Run the Actor once to capture a baseline, then schedule the same task with the same key-value store. Later runs load `snapshotKey`, compare the current stack, and classify each website as `CHANGED` or `UNCHANGED`.

### Cost and safety bounds

The Actor uses bounded HTTP requests only. It limits websites, concurrency, response bytes, redirects, and request duration. Local, private, link-local, and reserved network targets are rejected.

### Detection notes

Technology detection is evidence-based and may vary when a website changes HTML, headers, CDN behavior, or bot responses. The output includes confidence and source evidence so downstream users can review material changes.

# Actor input Schema

## `startUrls` (type: `array`):

Public HTTP or HTTPS pages whose technology stacks should be detected and compared with prior snapshots.

## `maxSites` (type: `integer`):

Hard cost cap for the number of unique websites processed in one run.

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

Maximum website requests in flight. Lower values reduce load and memory use.

## `timeoutMs` (type: `integer`):

Maximum wait time for each website request.

## `maxHtmlBytes` (type: `integer`):

Stops oversized responses before they consume excessive memory.

## `maxRedirects` (type: `integer`):

Maximum redirect hops per website within the same total site timeout.

## `minConfidence` (type: `integer`):

Only retain technologies detected at or above this confidence percentage.

## `previousSnapshots` (type: `array`):

Optional snapshots from a prior run for explicit change comparison.

## `snapshotKey` (type: `string`):

Key-value store record used to load and save technology snapshots across scheduled runs.

## `saveSnapshot` (type: `boolean`):

Persist current technology stacks so a later scheduled run can detect changes.

## Actor input object example

```json
{
  "startUrls": [
    {
      "url": "https://example.com"
    }
  ],
  "maxSites": 10,
  "concurrency": 2,
  "timeoutMs": 30000,
  "maxHtmlBytes": 2000000,
  "maxRedirects": 3,
  "minConfidence": 50,
  "previousSnapshots": [],
  "snapshotKey": "TECHNOLOGY_STACK_SNAPSHOT",
  "saveSnapshot": true
}
```

# Actor output Schema

## `items` (type: `string`):

No description

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

No description

## `changes` (type: `string`):

No description

## `snapshots` (type: `string`):

No description

## `report` (type: `string`):

No description

# 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 = {
    "startUrls": [
        {
            "url": "https://example.com"
        }
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("silicon1235/technology-stack-change-monitor").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 = { "startUrls": [{ "url": "https://example.com" }] }

# Run the Actor and wait for it to finish
run = client.actor("silicon1235/technology-stack-change-monitor").call(run_input=run_input)

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

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

```

## CLI example

```bash
echo '{
  "startUrls": [
    {
      "url": "https://example.com"
    }
  ]
}' |
apify call silicon1235/technology-stack-change-monitor --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=silicon1235/technology-stack-change-monitor",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/acts/c8QQFfWmkRj6bu8Ji/builds/pMZBcyhcehGf7xPc8/openapi.json