Monitor sites, endpoints, and SSL with clean data and zero noise.

JSON API. Fast checks. No bloated agents. Built by engineers for engineers.

Try it free View API
Your first site is free. A credit card is required to prevent abuse. Use Groups to organize by service, environment, and/or client.
Site Informant dashboard showing uptime percentage, response time, and SSL status.

Built for day to day operations

Clear status, fast alerts, and data you can integrate into your existing stack.

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Actionable Alerts

Downtime and SSL expiration notifications with clear details.

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Simple JSON API

Pull uptime, response time, and SSL status into automations.

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Groups

Organize sites by service, environment, client, or team.

What you get

Focused monitoring for HTTP/HTTPS, response performance visibility, and SSL certificate health.

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Uptime checks with clear history you can trust.
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Response time visibility for slowdowns, not just outages.
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SSL expiration tracking so cert renewals do not become incidents.
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Email alerts that are easy to understand and forward.
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Groups for services, environments, and client segmentation.
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API-first access for dashboards, incident workflows, and reporting.

Clean JSON for automation

Use the API for dashboards, scheduled checks, CI guards, and internal tooling. Keep the dashboard for humans, keep the data for systems.

Related reading: Monitoring in the age of AI: why signal still matters.

API documentation OpenAPI JSON
Example response (simplified)
{
  "url": "https://example.com",
  "isUp": true,
  "statusCode": 200,
  "lastResponseTimeMs": 243,
  "sslDaysRemaining": 41,
  "lastCheckedUtc": "2025-12-27T02:15:00Z"
}

Designed to be trusted

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Clear status with a dashboard that stays focused.
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Simple operation without unnecessary components.
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Privacy first with a product mindset that avoids tracking.
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Transparent pricing that stays affordable as you scale.
Designed and operated by engineers with production experience.

Ideal for

SaaS products, AI agents, internal services, APIs behind Cloudflare, CI pipelines, and production systems.

FAQ

How is Site Informant different from traditional uptime monitoring tools?

Site Informant focuses on signal over noise. Clear uptime status, honest response time data, and SSL expiration tracking, with Groups that match how teams actually organize systems.

Is Site Informant suitable for APIs, services, and AI agents?

Yes. Site Informant provides a clean JSON API so you can pull monitoring data into dashboards, workflows, internal tooling, and AI agents that need reliable system health signals.

Does Site Informant require a credit card?

Yes, even for the free site. This is to prevent abuse and keep checks reliable for everyone.

Can I group sites by client, service, or environment?

Yes. Groups let you organize sites by client, service, environment, or team so status and search stay focused.

Start monitoring in minutes

Add a site, pick your alert preferences, and get reliable uptime and SSL visibility right away.

Try it free