Public APIs Directory

A collective list of free APIs for use in software and web development.

FreeCryptoAPI
Cryptocurrency

REST API documentation for FreeCryptoAPI.com

apiKey HTTPS CORS: ? Free: 100,000 requests / month
OpenRouter
Development

OpenRouter provides a unified API that gives you access to hundreds of AI models through a single endpoint, while automatically handling fallbacks and selecting the most cost-effective options. Get started with just a few lines of code using your preferred SDK or framework.

apiKey HTTPS CORS: ? Free: 50 reqs/day
Snapee Website Screenshot
Development

Capture pixel-perfect website screenshots via Dashboard or API.

No Auth HTTPS CORS: ? Free
Resend Email API
Email

Email API that just works Quickly integrate email into your application with a powerful and easy-to-use REST API.

apiKey HTTPS CORS: ? Free: 3,000 emails / mo
Verifalia API
Email

Email verification real-time API

HTTP Basic Auth HTTPS CORS: ? Free version: 25 verifications /day
Mailer send Email API
Email

Email API simplified Fast, secure email delivery you can integrate in minutes with a reliable REST API and official SDKs.

apiKey HTTPS CORS: ? Free: 500 emails /month and 10 email verification credits
Mailgun Email API
Email

Flexible Email API solution Send emails from your application and automatically trigger transactional emails with the Mailgun Email API.

apiKey HTTPS CORS: ? Free: 100 emails per day
Email awesome validation-api
Email

Email Validation REST API! This API is designed to help businesses verify the authenticity of email addresses, ensuring that they belong to legitimate organizations. This is crucial for maintaining the integrity of your business communications and reducing the risk of fraudulent activities.

apiKey HTTPS CORS: ? Free: 1000/month
Juvlon Email API
Email

Your App + Our Email API= Seamless Communication Let your software talk to Juvlon’s email API service for faster, reliable, and scalable communication.

apiKey HTTPS CORS: ? Free: 20,000 (For a Month)
Brevo (Sendinblue)
Email

Build powerful integrations with the Brevo API The Brevo API provides programmatic access to all platform features through a unified REST interface. Use the API to send transactional and marketing messages across email, SMS, and WhatsApp. Manage contacts, build audiences, and run targeted campaigns. Track sales pipelines and sync eCommerce data to measure campaign performance. Integrate live chat, receive real-time webhooks, and configure all account settings programmatically.

apiKey HTTPS CORS: ?
CoinMarketCap
Cryptocurrency

Cryptocurrencies Prices

apiKey HTTPS CORS: ? Free: 10K call credits/mo
ZipCodeAPI
Geocoding

US zip code distance, radius and location API

apiKey HTTPS CORS: ? Free plan: 240 Requests/day (10 per hour)