# Website Change Intelligence API | 💵$1/1K (`webdata_labs/website-change-intelligence-api`) Actor

\[💵 $1.00 / 1K] Monitor public pricing, product, legal, and documentation pages. Detect meaningful changes with severity, price deltas, and before/after evidence.

- **URL**: https://apify.com/webdata\_labs/website-change-intelligence-api.md
- **Developed by:** [WebData Labs](https://apify.com/webdata_labs) (community)
- **Categories:** Automation, Developer tools, SEO tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $0.60 / 1,000 monitored page 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/platform/actors/running/actors-in-store#pay-per-event

## What's an Apify Actor?

Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
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.

In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js/docs.md):

```bash
npm install apify-client
```

In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.md):

```bash
pip install apify-client
```

In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):

````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash

In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/integrations/mcp.md).

If your project is in a different language, use 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

**Turn public web pages into a change feed your team can act on.** Website Change Intelligence API watches pricing, product, legal, changelog, and documentation pages, then returns meaningful changes with severity and before/after evidence.

### 🔎 What does Website Change Intelligence API do?

Give it public URLs and it creates a persistent baseline for each page. On later runs it detects changed text, added or removed prices, and classifies the result as `PRICING`, `PRODUCT`, `LEGAL`, `DOCUMENTATION`, or general `CONTENT`.

This is a monitoring API, not a bulk archive of raw HTML. It extracts readable public page content and returns compact evidence designed for alerts and downstream automation.

### ✅ Why use this website change monitor?

- Catch competitor price and packaging changes.
- Watch terms, privacy policies, and regulatory pages.
- Detect product launches, removed features, and documentation updates.
- Schedule recurring checks directly on Apify.
- Send results to webhooks, Slack, Make, Zapier, Google Sheets, or your data warehouse.
- Download structured results through the Apify API.

Temporary source failures do not overwrite the last good baseline, so an outage cannot create a false page change.

### 📊 What data can it extract?

| Field | Type | Description |
|---|---|---|
| `status` | string | `INITIALIZED`, `CHANGED`, or `UNCHANGED` |
| `changeType` | string | Pricing, product, legal, documentation, or content classification |
| `severity` | string | High, medium, low, or none |
| `changeScore` | number | Approximate percentage of page text that changed |
| `priceChanges` | array | Added and removed price tokens |
| `addedText`, `removedText` | array | Compact before/after evidence |
| `previousCheckedAt` | datetime | Previous successful baseline timestamp |

### ⚙️ How to monitor a website for changes

1. Add one or more public page URLs.
2. Give the watchlist a stable `monitorName`.
3. Choose whether pricing, product, legal, documentation, or all changes matter.
4. Run once to create the baseline.
5. Create an Apify schedule and reuse the same input.
6. Connect a webhook or integration to receive the change feed.

### 💵 How much does website monitoring cost?

The Actor costs **$1 per 1,000 output rows** on the Free and Bronze tiers, with lower rates on larger plans. One returned page result is one billable result. Platform compute is included. Disable `includeUnchanged` when you only want billable rows for detected changes, but keep it enabled if your workflow needs a heartbeat on every check.

### 📥 Input

See the Input tab for the full configuration. A simple competitor pricing monitor looks like this:

```json
{
  "monitorName": "competitor-pricing",
  "urls": [
    "https://apify.com/pricing",
    "https://openai.com/api/pricing/"
  ],
  "focus": "pricing",
  "includeUnchanged": true
}
````

The same `monitorName` and normalized URL always resolve to the same baseline. Change the monitor name when you intentionally want a fresh baseline.

### 📤 Output

You can download the dataset in JSON, HTML, CSV, or Excel.

```json
{
  "url": "https://example.com/pricing",
  "pageTitle": "Pricing",
  "status": "CHANGED",
  "changeType": "PRICING",
  "severity": "HIGH",
  "changeScore": 4.72,
  "priceChanges": [{"removed": ["$49/month"], "added": ["$59/month"]}],
  "addedText": ["Professional plan starts at $59/month."],
  "removedText": ["Professional plan starts at $49/month."]
}
```

### 🧩 Monitoring recipes

#### Competitor pricing intelligence

Use pricing and plan URLs, set `focus` to `pricing`, and schedule daily. High-severity results include detected price additions or removals.

#### Terms and privacy policy monitoring

Use terms, privacy, cookie, and acceptable-use URLs with `focus` set to `legal`. Route changed rows to your compliance review queue.

#### Product and documentation monitoring

Watch feature pages, changelogs, API docs, and migration guides. Run hourly or daily depending on how quickly your team needs the signal.

### ⚠️ Limits and caveats

- The Actor monitors server-rendered public HTML. Pages whose useful content appears only after browser-side JavaScript may return limited text.
- A changed navigation template can affect many pages. The extractor removes common headers, navigation, footers, cookie notices, and scripts to reduce this noise.
- Price detection is evidence, not accounting advice. Currency formatting and promotional copy vary.
- Use a stable page URL. Redirects are followed, while URL fragments are ignored.
- Respect website terms, robots policies, copyright, and applicable law. Only public content is read; no login or private user data is requested.

### ❓ FAQ

#### Can I return only changed pages?

Yes. Disable `includeUnchanged`. The first successful run still returns an `INITIALIZED` baseline row.

#### Does it use an LLM?

No. Classification and evidence extraction are deterministic, which keeps runs fast, explainable, and inexpensive.

#### What happens when a page is temporarily down?

The run summary counts the failure and preserves the previous good baseline. Failed checks do not create billable dataset rows.

### 🛠️ Support

Use the Issues tab and include the run URL, a redacted input, the monitored URL, and the change you expected. Use the API tab for programmatic runs, schedules, datasets, and webhooks.

# Actor input Schema

## `monitorName` (type: `string`):

Stable name for this watchlist. Reuse it on scheduled runs.

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

Public HTTP or HTTPS pricing, product, legal, changelog, or documentation URLs.

## `focus` (type: `string`):

Limit alerts to one business-relevant category or detect all meaningful changes.

## `includeUnchanged` (type: `boolean`):

Keep enabled for monitoring heartbeats and a non-empty first run. Disable for change-only feeds.

## `advanced` (type: `object`):

Optional: timeoutSecs (5-60), maxTextChars (10000-200000), resetBaseline, userAgent.

## Actor input object example

```json
{
  "monitorName": "apify-product-watch",
  "urls": [
    "https://apify.com/pricing"
  ],
  "focus": "all",
  "includeUnchanged": true
}
```

# Actor output Schema

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

No description

## `OUTPUT` (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 = {
    "monitorName": "apify-product-watch",
    "urls": [
        "https://apify.com/pricing"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("webdata_labs/website-change-intelligence-api").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 = {
    "monitorName": "apify-product-watch",
    "urls": ["https://apify.com/pricing"],
}

# Run the Actor and wait for it to finish
run = client.actor("webdata_labs/website-change-intelligence-api").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 '{
  "monitorName": "apify-product-watch",
  "urls": [
    "https://apify.com/pricing"
  ]
}' |
apify call webdata_labs/website-change-intelligence-api --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=webdata_labs/website-change-intelligence-api",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "Website Change Intelligence API | 💵$1/1K",
        "description": "[💵 $1.00 / 1K] Monitor public pricing, product, legal, and documentation pages. Detect meaningful changes with severity, price deltas, and before/after evidence.",
        "version": "0.1",
        "x-build-id": "U8P3Ib9Q45eq5wdCG"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/webdata_labs~website-change-intelligence-api/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-webdata_labs-website-change-intelligence-api",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/webdata_labs~website-change-intelligence-api/runs": {
            "post": {
                "operationId": "runs-sync-webdata_labs-website-change-intelligence-api",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/webdata_labs~website-change-intelligence-api/run-sync": {
            "post": {
                "operationId": "run-sync-webdata_labs-website-change-intelligence-api",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "inputSchema": {
                "type": "object",
                "required": [
                    "monitorName",
                    "urls"
                ],
                "properties": {
                    "monitorName": {
                        "title": "Monitor name",
                        "type": "string",
                        "description": "Stable name for this watchlist. Reuse it on scheduled runs.",
                        "default": "competitor-watchlist"
                    },
                    "urls": {
                        "title": "Pages to monitor",
                        "type": "array",
                        "description": "Public HTTP or HTTPS pricing, product, legal, changelog, or documentation URLs.",
                        "items": {
                            "type": "string"
                        }
                    },
                    "focus": {
                        "title": "What changes matter?",
                        "enum": [
                            "all",
                            "pricing",
                            "product",
                            "legal",
                            "documentation"
                        ],
                        "type": "string",
                        "description": "Limit alerts to one business-relevant category or detect all meaningful changes.",
                        "default": "all"
                    },
                    "includeUnchanged": {
                        "title": "Return unchanged pages",
                        "type": "boolean",
                        "description": "Keep enabled for monitoring heartbeats and a non-empty first run. Disable for change-only feeds.",
                        "default": true
                    },
                    "advanced": {
                        "title": "Advanced options",
                        "type": "object",
                        "description": "Optional: timeoutSecs (5-60), maxTextChars (10000-200000), resetBaseline, userAgent."
                    }
                }
            },
            "runsResponseSchema": {
                "type": "object",
                "properties": {
                    "data": {
                        "type": "object",
                        "properties": {
                            "id": {
                                "type": "string"
                            },
                            "actId": {
                                "type": "string"
                            },
                            "userId": {
                                "type": "string"
                            },
                            "startedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "finishedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "status": {
                                "type": "string",
                                "example": "READY"
                            },
                            "meta": {
                                "type": "object",
                                "properties": {
                                    "origin": {
                                        "type": "string",
                                        "example": "API"
                                    },
                                    "userAgent": {
                                        "type": "string"
                                    }
                                }
                            },
                            "stats": {
                                "type": "object",
                                "properties": {
                                    "inputBodyLen": {
                                        "type": "integer",
                                        "example": 2000
                                    },
                                    "rebootCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "restartCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "resurrectCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "computeUnits": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "options": {
                                "type": "object",
                                "properties": {
                                    "build": {
                                        "type": "string",
                                        "example": "latest"
                                    },
                                    "timeoutSecs": {
                                        "type": "integer",
                                        "example": 300
                                    },
                                    "memoryMbytes": {
                                        "type": "integer",
                                        "example": 1024
                                    },
                                    "diskMbytes": {
                                        "type": "integer",
                                        "example": 2048
                                    }
                                }
                            },
                            "buildId": {
                                "type": "string"
                            },
                            "defaultKeyValueStoreId": {
                                "type": "string"
                            },
                            "defaultDatasetId": {
                                "type": "string"
                            },
                            "defaultRequestQueueId": {
                                "type": "string"
                            },
                            "buildNumber": {
                                "type": "string",
                                "example": "1.0.0"
                            },
                            "containerUrl": {
                                "type": "string"
                            },
                            "usage": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "integer",
                                        "example": 1
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "usageTotalUsd": {
                                "type": "number",
                                "example": 0.00005
                            },
                            "usageUsd": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "number",
                                        "example": 0.00005
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```