Real-time API monitoring & alertingKnow when your APIs go down
before your users do
Monitor uptime, response times, and JSON response bodies for every endpoint you care about. Get notified instantly via Slack, Discord, Telegram or email when something breaks.
APIs being monitored right now
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Why Pulsarc
Built for developers who hate downtime
Every minute your API is down costs you customers, revenue, and trust. Pulsarc catches issues before they become incidents.
Lightning-fast checks
Monitor your endpoints as often as every minute. Detect outages within seconds, not after a customer complains.
Multi-channel alerts
Get notified where your team already works: Slack, Discord, Telegram, or email. Configure who gets what.
Deep insights
Track response times, uptime percentages, and 90 days of historical data with detailed graphs.
Response body validation
Don't just check status codes. Validate JSON responses with assertions like 'status equals OK' or 'data has at least 1 item'.
Team collaboration
Invite teammates with granular permissions. Share monitors, folders, and notification channels across your team.
Secure by default
Bearer tokens, Basic Auth, and custom headers all supported. Credentials encrypted at rest. No tracking, no analytics.
How it works
From zero to monitoring in 30 seconds
Add your endpoint
Paste a URL, choose an HTTP method, set the expected status code. Test it once — done.
We watch it for you
Pulsarc pings your endpoint at the interval you choose. Every check is logged.
Get alerted instantly
When something breaks, we tell you on Slack, Discord, Telegram, or email — within seconds.
API Monitoring
What is API monitoring?
API monitoring is the practice of continuously checking that your web APIs and HTTP endpoints are responding correctly. It catches outages, slow responses, broken deployments, and upstream provider failures — usually before your customers notice.
Modern applications depend on dozens of moving parts: your own backend, third-party APIs, payment gateways, authentication providers, webhooks, and microservices that talk to each other. When any one of those fails silently, the impact can ripple through your entire product.
Pulsarc gives you a single dashboard to watch all of them. Whether you're running a SaaS, an e-commerce store, an internal microservice mesh, or a hobby project, you get the same visibility that big teams pay enterprise prices for.
REST API uptime
Confirm your /health endpoint returns 200 every minute.
Deploy verification
Catch broken deploys the moment they hit production.
Third-party tracking
Watch external APIs you depend on (payment, auth, mail).
SLA enforcement
Prove uptime to customers with 90 days of historical data.
Notifications
Alerts where your team already works
No email-only fallback that gets buried in your inbox. Pulsarc integrates with the chat tools you use every day, so the right people see the alert the second it fires.
Slack
Install the Pulsarc app to your workspace, pick a channel, done. Color-coded alerts with one-click monitor links.
Discord
Add the Pulsarc bot to your server. Rich embeds with green/yellow/red status colors land in your chosen channel.
Telegram
DM, group, or channel — choose how you want to be notified. Set up takes 30 seconds with the @pulsarc_bot.
Browser Extension
Native Chrome popup notifications. Toolbar icon turns red when something is wrong. Works while you browse.
When you set up a notification in Pulsarc, you choose which events trigger it (down, recovered, slow), which monitor it applies to (one specific monitor or all of them), and which channel delivers it. You can have multiple notifications with different rules — for example, send all production incidents to Slack but only critical downtime to Telegram for after-hours pager duty.
Notifications fire from a separate background service that polls an outbox table, so even if your main API is under load, alerts still go out reliably. State changes are debounced so you get one clean notification per event, not a flood.
Inside Pulsarc
More than just "is it up?"
Validate response bodies, not just status codes
Status code 200 doesn't always mean things are working. Pulsarc lets you write JSON-path assertions on the response body — check that '$.status' equals 'ok', that '$.data' has at least one element, or that '$.id' is a number. If any assertion fails, the monitor goes down.
- JSONPath assertions (equals, contains, exists, regex, type checks)
- Catch broken deploys that return 200 with empty data
- Alert on partial failures and degraded responses
90 days of historical insights
Every check is logged. We aggregate them into daily summaries with uptime percentages, response time distributions, and status code breakdowns. Track trends over time and prove your SLAs to customers.
- 24h of raw check data, 90 days of daily aggregates
- Uptime %, min/avg/max/median response times
- Status code breakdown per day
Built for teams from day one
Create a team, invite teammates by email, give each member granular permissions. Folders and notifications are scoped to the team — everyone sees the same monitors, but only the right people can edit or delete.
- Email-based invites with secure 7-day tokens
- Per-member permissions (create, edit, delete, notify)
- Multi-team support — switch between teams instantly
Browser extension for instant awareness
The Pulsarc Chrome extension lives in your toolbar. Green icon when everything is healthy, red badge with a popup notification when something goes down. Click any monitor to jump straight to its detail page.
- Toolbar status icon (up / degraded / down)
- Native browser notifications for state changes
- Auto-login from your existing Pulsarc session
FAQ
Common questions
How is Pulsarc different from other uptime monitoring tools?+
Most uptime tools only check status codes and email you when things break. Pulsarc adds JSON response body validation, integrates with the chat tools you already use (Slack, Discord, Telegram), gives you a browser extension, and supports proper team collaboration with permissions — all in a clean, modern dashboard.
What does the free plan include?+
Everything you need to monitor APIs: unlimited monitors, all notification channels, team support, the browser extension, 90-day history, and response body assertions. No credit card required.
How often does Pulsarc check my endpoints?+
You choose: every 1, 3, or 15 minutes per monitor. The check runs from a dedicated worker service and the result is recorded immediately.
Can Pulsarc monitor private or authenticated APIs?+
Yes. You can attach Bearer tokens or Basic Auth credentials to any monitor. Credentials are encrypted at rest and only sent over HTTPS to your endpoint.
How fast do I get notified when something breaks?+
As soon as the next check fails. With a 1-minute interval, you'll know within 60 seconds. Notifications are dispatched from a separate background service and typically arrive within a few seconds of the check completing.
Does Pulsarc work with Slack, Discord, and Telegram?+
Yes — all three are first-class integrations. Slack uses an OAuth app, Discord uses a bot, and Telegram supports DM, group, and channel delivery via the @pulsarc_bot.
Can I share monitors with my team?+
Yes. Create a team, invite members by email, and assign each one granular permissions (can create / edit / delete monitors, can manage notifications). Switch between your personal workspace and team workspaces from the navbar.
Is there an API or webhook?+
Every action in Pulsarc is backed by a REST API. You can manage monitors, notifications, teams, and check results programmatically. See the documentation for the full reference.
Start monitoring in 30 seconds
Sign up for free, paste your endpoint URL, and you're live. No credit card, no setup wizard, no waiting.
Explore the docs
Everything you need to get the most out of Pulsarc.
Getting Started
Create your account and set up your first monitor.
Monitors
Configure endpoints, methods, status codes, and assertions.
Notifications
Set up Slack, Discord, Telegram, and email alerts.
Teams
Invite members and manage permissions.
Browser Extension
Monitor your APIs from your browser toolbar.
Security
Authentication, credentials, and encryption.