Page Modified Pinger
Page Modified Pinger is a developer or operator tool operated by Valley Hosting. It runs on behalf of a site owner for monitoring, uptime checks, performance audits, or internal QA.
If you run the site, you are probably the customer of whoever is running this agent. Blocking it would hide your own monitoring data from yourself.
If you are an end-user surprised to see this in your logs, it is almost always something a third-party SaaS is doing on behalf of someone who manages your site.
See Page Modified Pinger on your own site
Match the User-Agent header on incoming requests against the pattern below.
regex
For higher confidence, also verify the source IP against the operator's published ranges. UA strings can be spoofed; IP ownership is harder to fake.
Renders JavaScript
No
IP verification
User-Agent only
Crawl frequency
Scheduled probes
Honors robots.txt
Yes
Honors Crawl-delay
Varies
Should I let Page Modified Pinger through?
In most cases, yes. Almost always run by you or your vendor. Blocking hides your own monitoring data. If volume gets noisy, rate-limit it before you block it outright.
Does blocking Page Modified Pinger affect my Google rankings?
No. Page Modified Pinger is not a search-engine crawler. Your ranking on Google or Bing is unaffected by what you do here.
How do I confirm a request is really from Page Modified Pinger?
Look at the User-Agent header in your access logs and match it against the strings listed above. Worth knowing that the User-Agent is easy to fake, so this check tells you "the traffic claims to be Page Modified Pinger", not "the traffic is genuinely Page Modified Pinger". If you need stronger guarantees, look for a reverse-DNS check or wait for Valley Hosting to publish IP ranges.
What's the best way to understand what Page Modified Pinger is doing on my site?
Look at which URLs it hits, how often, and what time of day. The request pattern usually tells you whether it's building an index, watching for a specific change, or trying to pull data in bulk. The User-Agent name alone rarely tells the full story.
What's the cleanest way to control Page Modified Pinger?
Two layers. Robots.txt for the polite crawlers that read it, and rules at your CDN or edge for the ones that don't. Rankly's Agent Experience handles both from a single config, so you can allow, block, rate-limit, or serve a stripped-down version per bot. Agent Analytics handles the observation half so you know which bots are actually worth a rule.