# Monitor supplier and manual document versions

**Use case:** 

Watch several supplier price lists, product manuals or specification PDFs from their download pages in one scheduled run. Each target keeps its own identity and last-good state, so one broken page never hides changes on the others. Replace the sample targets with your suppliers' download pages.

## Input

```json
{
  "targets": [
    {
      "targetId": "nist-sp-800-53r5-page",
      "label": "NIST SP 800-53 Rev. 5 from its publication page",
      "pageUrl": "https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final",
      "hrefRegex": "NIST\\.SP\\.800-53r5\\.pdf$"
    },
    {
      "targetId": "irs-form-1040-sr",
      "label": "Current IRS Form 1040-SR",
      "pageUrl": "https://www.irs.gov/forms-pubs/about-form-1040",
      "linkText": "Form 1040-SR PDF"
    }
  ],
  "monitorKey": "supplier-documents",
  "mode": "all",
  "baselineMode": "emitBaseline",
  "includeTextDiff": false,
  "maxPdfSizeMb": 25,
  "maxPagesPerPdf": 500
}
```

## Output

```json
{
  "targetId": {
    "label": "Target id",
    "format": "string"
  },
  "label": {
    "label": "Label",
    "format": "string"
  },
  "status": {
    "label": "Status",
    "format": "string"
  },
  "currentPdfUrl": {
    "label": "Current PDF",
    "format": "string"
  },
  "finalPdfUrl": {
    "label": "Final pdf url",
    "format": "string"
  },
  "matchedLinkText": {
    "label": "Matched link text",
    "format": "string"
  },
  "pageCount": {
    "label": "Page count",
    "format": "integer"
  },
  "fileSizeBytes": {
    "label": "File size bytes",
    "format": "integer"
  },
  "fileHash": {
    "label": "File hash",
    "format": "string"
  },
  "contentHash": {
    "label": "Content hash",
    "format": "string"
  },
  "textLayerAvailable": {
    "label": "Text layer available",
    "format": "boolean"
  },
  "httpLastModified": {
    "label": "Http last modified",
    "format": "string"
  },
  "observedAt": {
    "label": "Observed at",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [PDF Change Monitor & Linked Document Tracker](https://apify.com/automa-flow/pdf-link-change-monitor.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/automa-flow/pdf-link-change-monitor.md) to learn more, explore other use cases, and run it yourself.


## 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.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **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).
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For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/automa-flow/pdf-link-change-monitor.md

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).