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Web dashboard + iOS & Android app

Build, host, test and monitor your APIs in one place

Spin up a REST API in minutes, protect it with API keys, test it like Postman and get alerted the second anything goes down. No servers to manage.

Create your first API – free Try free tools
  • Free plan, no card
  • API keys stored hashed
  • Alerts by email & webhook
  • Public status pages
terminal
# Your hosted API is live the moment you save it
$ curl https://api24x7.com/h/demo/users/42 \
    -H "X-API-Key: a24_••••••••"

{
  "id": 42,
  "name": "Ava Khan",
  "email": "ava.khan@example.com",
  "plan": "pro"
}
# 200 OK · 38 ms · logged · rate limited · monitored

Everything you need to ship and run APIs

One platform replaces a pile of separate tools for mocking, hosting, testing and uptime monitoring.

Mock API Generator

Define endpoints and JSON responses in a visual editor. Your API goes live at a public URL the moment you save.

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API Hosting

Create a collection, name its fields, and get list, read, create, update and delete endpoints instantly with validation, filtering, sorting and pagination.

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API Monitoring

Check endpoints on a schedule, verify status codes and keywords, track response times and get alerted the moment something breaks.

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Website Uptime Monitoring

Downtime costs rankings and revenue. Monitor your site from the outside, publish a status page and be the first to know.

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API Testing Tool

Build requests, save them in collections, reuse variables and add assertions that tell you instantly whether an API behaves correctly.

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SSL Certificate Monitoring

An expired certificate blocks visitors and breaks API clients. We watch your certificates and warn you in time.

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Cron Job Monitoring

Add one line to the end of your job. If it does not check in on schedule, we tell you before the damage spreads.

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From idea to live API in three steps

  1. 1

    Create

    Name your API and get a public HTTPS base URL instantly.

  2. 2

    Define

    Add endpoints with JSON responses or collections that store real data.

  3. 3

    Secure & monitor

    Add API keys, rate limits and an uptime monitor with alerts.

Free developer & SEO tools

No sign-up needed. JSON formatter, API tester, SSL and header checkers, SEO analyzer and more.

See all 29 tools

JSON Formatter & Validator

Free online JSON formatter and validator. Beautify, minify and validate JSON instantly in your browser, with clear error messages. No data is uploaded.

JWT Decoder

Decode a JWT and read its header, payload and expiry instantly. Runs locally in your browser, your tokens are never uploaded.

Online API Tester

Send GET, POST, PUT, PATCH and DELETE requests to any public API and inspect status, headers, timing and body. Free online REST API tester, no install.

HTTP Header Checker

Check the HTTP response headers of any website, see status, server, caching and security headers (HSTS, CSP, X-Frame-Options) with a quick score.

SSL Certificate Checker

Check any domain's SSL/TLS certificate: expiry date, issuer, alternative names, protocol and trust status. Get alerted before it expires.

DNS Lookup

Look up DNS records for any domain: A, AAAA, MX, NS, TXT, CNAME, SOA and CAA. Free DNS record checker.

Is My Website Down? Uptime Checker

Check if a website is down for everyone or just you. See HTTP status and response time instantly. Free uptime checker.

On-Page SEO Analyzer

Analyze any page for on-page SEO: title and meta length, H1, canonical, image alt text, Open Graph, structured data, speed and more, with a score.

Manage everything from your phone

The API24x7 mobile app for iOS and Android signs in with your account so you can create APIs, review request logs, run the API tester and check monitor status while you are away from your desk.

  • Create and edit endpoints and collections
  • Instant push-style status of every monitor
  • Run API tests and save to collections
  • Use all the free tools on the go

Monitors

api.shop.com99.98%
shop.com100%
cron: backup97.1%

From the blog

All articles →
API Development

How to Test a REST API: Tools, Methods and Best Practices

From a quick curl command to automated assertions: how to test a REST API properly at every stage.

 Guides

HTTP Status Codes Explained: 2xx, 3xx, 4xx and 5xx

A quick tour of the HTTP status code families and the codes you will meet most often when building and debugging APIs.

 Security

REST API Security Checklist: 12 Things to Do Before Launch

Authentication, rate limiting, validation, CORS, logging and more. Run through this checklist before you expose an API to the internet.

Frequently asked questions

API24x7 is a platform to create and host REST APIs, test endpoints, and monitor websites and APIs for uptime, with a web dashboard, a mobile app and a library of free developer tools.

Yes. The free plan includes several hosted APIs, endpoints, monitors and unlimited use of all public tools. Paid plans raise limits and add faster monitoring intervals.

Every API can require an API key (stored only as a SHA-256 hash), restrict browser origins with CORS, allow-list IP addresses and enforce per-minute rate limits. All traffic is HTTPS and every request is logged.

Yes. Sign in to the iOS or Android app with the same account to manage APIs, run tests and watch monitors.

Start building, testing and monitoring today

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