Free Tool

API Status Checker

Instantly check any API endpoint's status, response time, security headers, and CORS configuration. Free, no signup required.

What You Get

Here's an example of the API health report this tool provides. Try it above with any endpoint.

200

Endpoint Healthy

https://api.example.com — 142 ms response time

Status Code200 OK
Response Time142 ms
Content-Typeapplication/json
Servercloudflare

Security Headers

Strict-Transport-SecurityPresent
Content-Security-PolicyPresent
X-Frame-OptionsDENY
X-Content-Type-Optionsnosniff

The checker tests your endpoint with the HTTP method you choose (GET, POST, HEAD, etc.) and reports the status code, response time, and full response headers. A 200 OK confirms the endpoint is healthy. Codes like 301/302 indicate redirects, 403 means access is forbidden, and 5xx codes signal server errors.

Security headers protect your users from common attacks. Strict-Transport-Security (HSTS) forces HTTPS connections, Content-Security-Policy prevents XSS attacks, X-Frame-Options blocks clickjacking, and X-Content-Type-Options stops MIME-type sniffing. Missing security headers leave your API and its users exposed to known vulnerabilities.

How It Works

1

Enter URL

Type any URL or API endpoint. We'll send a request and follow any redirects automatically.

2

We Analyze Headers

Our server checks the response status, security headers, CORS configuration, caching headers, and redirect chain.

3

See the Results

View the full status report with a security grade, response details, and actionable insights.

Frequently Asked Questions

This tool sends a request to any URL or API endpoint and reports its status (up, down, or redirecting), response time, HTTP headers, security headers grade, CORS configuration, caching headers, and redirect chain — all in real time.

Yes, completely free with no signup required. Just enter a URL and check instantly. There are no daily limits.

The security grade (A+ through F) evaluates how well a server implements security best practices via HTTP headers. It checks for HSTS (Strict-Transport-Security), Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. A higher grade means better protection against common web attacks.

CORS (Cross-Origin Resource Sharing) headers control which websites can make requests to an API. The Access-Control-Allow-Origin header specifies allowed origins, while other headers control allowed methods, headers, and credentials. Misconfigured CORS can either block legitimate requests or expose APIs to unauthorized access.

Redirects (301, 302, 307, 308) happen when a server sends your request to a different URL. Common reasons include HTTP to HTTPS upgrades, www to non-www redirects, URL canonicalization, or load balancing. While a few redirects are normal, excessive redirect chains can slow down your application.

Under 200ms is excellent, 200-500ms is good, 500-1000ms is acceptable for complex operations, and over 1 second may indicate performance issues. Response times vary based on server location, processing complexity, and network conditions.

Yes! exit1.dev offers continuous API and website monitoring with alerts via email, Slack, Discord, and webhooks. You'll get notified instantly when your endpoints go down, respond slowly, or have SSL/domain issues.

Learn More About API Monitoring

Guides on checking website status, security headers, and API endpoint monitoring.

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HTTP Security Headers Explained

Complete checklist of security headers: HSTS, CSP, CORS, and how to implement them.

API Endpoint Monitoring Playbook

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API Observability Automation Toolkit

Automate API monitoring with payload validation, status automation, and incident response.

Need Continuous API Monitoring?

Stop checking manually. exit1.dev monitors your APIs and websites 24/7 and alerts you instantly when something goes wrong. Get notified via email, Slack, Discord, or webhooks.

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