Watch competitor pricing - Prefetch API

Pricing pages change quietly. A monitor checks the page on a schedule, extracts each plan’s price, and emails you only when one actually changes. Cost: about 1 credit a day for one page checked daily. A day when the page’s text changes adds 3 for the price extraction and 1 for the judge.

1. Create the monitor

json mode tracks the facts you describe instead of the whole page, so a new testimonial or a rotating banner never triggers an alert. The goal filters what’s left.

curl -X POST "https://api.prefetch.io/monitor" \
  -H "X-API-Key: $PREFETCH_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Linear pricing",
    "schedule": { "text": "daily at 9am", "timezone": "Europe/London" },
    "goal": "Alert me when a plan is added or removed, or a plan price or its seat limit changes",
    "targets": [
      {
        "type": "scrape",
        "urls": ["https://linear.app/pricing"],
        "change_tracking": { "modes": ["json"], "json_prompt": "Each plan: name, monthly price per seat, annual price per seat, seat limit" }
      }
    ],
    "email": { "to": ["[email protected]"] }
  }'

Your account’s own email address is active straight away. Any other address gets a confirmation email first.

2. Take the baseline now

The first check records the page and announces nothing. Run it straight away instead of waiting for tomorrow:

curl -X POST "https://api.prefetch.io/monitor/$MONITOR_ID/run" \
  -H "X-API-Key: $PREFETCH_API_KEY"

3. What you’ll get

When a price moves, the email and the check say exactly what changed and why it matters:

CHANGED: https://linear.app/pricing
Judge: meaningful (high). The Business plan went from $12 to $14 per seat a month.
- plans[1].monthly_price: "$12" → "$14"

Variations

Several competitors: put each pricing page in the same target’s urls, up to 100.
A whole section: use a crawl target to watch a changelog or blog for new posts. See Targets.
Into Slack or your CRM: add a webhook and post each monitor.page event where your team works. See Alerts.
From chat: with the MCP server, ask “Watch linear.app/pricing every morning and tell me when a plan’s price changes.”

Prompt for your coding agent

Set up a Prefetch monitor that watches our competitors' pricing pages (docs: https://docs.prefetch.io/recipes/competitor-pricing).
Use POST https://api.prefetch.io/monitor with the X-API-Key header (key in PREFETCH_API_KEY).
One scrape target with these URLs: <list>. Use change_tracking modes ["json"] with a json_prompt that extracts
each plan's name, monthly price and key limits. Schedule it daily at 9am in our timezone, set a goal that only
price and plan changes matter, and email <address>. Then call POST /monitor/{id}/run to take the baseline,
and print the monitor's estimated_credits_per_month.