ChangePulse — SaaS Pricing Page Change Watcher

Watch SaaS pricing pages for real content changes. Hash, diff, and get structured change events — pay only per check and per detected change.

Live: https://apify.com/zombiekiller69/changepulse

Schedule a list of public /pricing (or any) URLs. ChangePulse normalizes HTML (optional CSS selector), stores a SHA-256 hash across runs, and emits a dataset row when content actually moves. Built for competitive pricing intel, agencies, and agent pipelines that need changed: true events — not prose digests.

Why this (not DIY ChatGPT)

One-shot summarizers do not give you storage, schedules, hash history, or marketplace PPE metering. ChangePulse is ops infrastructure: fetch → hash → compare → event.

Pricing (pay-per-event)

Event	Price	When
Actor start	$0.00005	Every run
URL check	$0.002	Each successful fetch+hash
Change detected	$0.05	Hash differs from previous run

Cost example: 20 pricing pages × daily × 30 days ≈ 600 checks → ~$1.20, plus $0.05 only when a page actually moves.

Demo proof (2026-08-23)

Controllable page bumped $10/user → $12/user:

• Baseline: https://console.apify.com/actors/ijj59HRQY9Xgk3GrY/runs/VMYaZ8AzHIgOMVlgy — url-check, changed: false
• Change: https://console.apify.com/actors/ijj59HRQY9Xgk3GrY/runs/qukgDjyeyVlvX12tU — url-check + change-detected, changed: true

{
  "changed": true,
  "changeType": "pricing",
  "diffSnippet": "- Pro$10/user\n+ Pro$12/user",
  "runId": "qukgDjyeyVlvX12tU"
}

Input

{
  "urls": [
    "https://www.notion.so/pricing",
    "https://linear.app/pricing",
    "https://vercel.com/pricing",
    "https://stripe.com/pricing",
    "https://www.figma.com/pricing",
    "https://slack.com/pricing",
    "https://airtable.com/pricing",
    "https://www.canva.com/pricing"
  ],
  "contentSelector": "main",
  "compareWithPrevious": true
}

Tips:

• Prefill with your competitor /pricing URLs.
• Set contentSelector (e.g. main) to cut nav/footer noise.
• Pass a persistent state store when running under limited permissions so hashes survive across runs.
• Schedule daily or hourly in Apify Tasks; alert only on changed: true.

Output fields

url, hash, previousHash, changed, changeType, diffSnippet, snippetAfter, httpStatus, checkedAt, runId

Ideal schedules

• Daily Apify Task on 5–20 rival pricing URLs
• Webhook / dataset → Slack or MCP agent only when changed is true
• Baseline first run (no change), then alert on diffs

Limitations

Public HTML only. JS-heavy SPAs that return empty shells may need a browser Actor later. Prefer tight CSS selectors.

Categories / SEO keywords

SaaS pricing page monitor, competitor pricing watcher, URL change detection, content hash diff, pricing page tracker, competitive intel automation, MCP change events