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Guardr

Checks websites from outside for uptime, certificates, headers, exposed files and leaked keys, grading each site A to F.

Free plan · From $3/moActively maintained

Developer toolsMonitoringSecurityFree tier
guardr.io ↗
Open guardr.ioAlternativesSet it up for my teamIs Guardr yours? Claim the card →
At a glanceswept Oct 22, 2026

not read yet

Use

For
people who manage websites for clients or for their own sites, watching uptime and security settings
Price
Free plan · From $3/mopricing page, read Oct 24, 2026
Activity
Actively maintainedsite updated 5 days ago
Used for
  • get alerted when a site stops answering
  • check certificate expiry before a renewal lapses
  • find exposed env files and API keys in JavaScript bundles
read off guardr.io on Oct 24, 2026
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistantsguardr.io ↗
Pricingpricing page, read Oct 24, 2026

Free plan · From $3/mo

pricing page

Your datawhat they publish, each line with its page · read Oct 24, 2026

These are Guardr's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 24, 2026
  • MCP serverio.guardr/guardrverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-24
  • Address to connectapi.guardr.io/mcp
  • API docsguardr.io/docs/apithe vendor's page ↗
  • MCP docsguardr.io/docs/mcpthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers
  • What is Guardr?

    Checks websites from outside for uptime, certificates, headers, exposed files and leaked keys, grading each site A to F. It is listed in the Atlas under Developer tools.

  • Who is Guardr for?

    people who manage websites for clients or for their own sites, watching uptime and security settings

  • How much does Guardr cost?

    Guardr has a free plan; paid plans start at $3/mo, per its pricing page on 2026-10-24.

  • Is Guardr free?

    Yes, Guardr has a free plan, per its pricing page on 2026-10-24.

  • Do people use Guardr?

    Little sign of use.

  • Is Guardr still maintained?

    Actively maintained: site updated 5 days ago.

  • Is Guardr safe?

    We do not audit vendors. What Guardr publishes, read 2026-10-24: GDPR stated on its privacy policy.

  • How do I cancel Guardr?

    In its own words (terms of service, 2026-10-24): “You may cancel your subscription at any time from the billing page in your dashboard.”

  • What are alternatives to Guardr?

    In Developer tools, by use: UptimeRobot, Hyperping, Prostack, UptyBots, Phare, Site Qwality Website Monitoring.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk