30+ Free REST APIs You Can Call Without an API Key in 2026 (No Credit Card, Zero-Auth)

Canpolat Kaya — Sun, 11 Oct 2026 12:22:47 +0000

Every developer has been there: you get inspired to build a weekend project, a portfolio app, or test out a new frontend framework like Next.js 15, React, or Vue.

You search for free public APIs, find a promising service, click the link, and immediately hit problems:

Mandatory account creation and email verification.
A free trial that requires a credit card upfront.
Obscure token headers or complicated OAuth flows before you can even see a sample JSON payload.
CORS errors crashing your localhost prototype.

To solve this friction, I put together a tested list of completely free, zero-authentication (Zero-Auth) REST APIs. You do not need an API key, an account, or a payment method. You can copy-paste the URL into your terminal with curl or fetch it directly in your browser console to get instant JSON data right now.

Weather and Geocoding APIs

Open-Meteo
Open-Meteo is by far the cleanest open-source weather API available. It provides high-resolution hourly weather forecasts, historical data, and marine forecasts with zero API key required for non-commercial use.

Endpoint: https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&current_weather=true
Rate Limit: 10,000 requests per day
CORS: Enabled
FreeAPI Link: https://findfreeapi.com/en/service/open-meteo

REST Countries
The ultimate dataset for country information: flags, currencies, languages, borders, population, and capital cities. Perfect for dropdown menus, country quizzes, and travel dashboards.

Endpoint: https://restcountries.com/v3.1/all
Rate Limit: Unlimited fair-use
CORS: Enabled
FreeAPI Link: https://findfreeapi.com/en/service/rest-countries

IP-API (ipapico)
Need to detect user location, timezone, or ISP without third-party SDKs? IP-API returns instant JSON geolocation data based on the caller's IP address.

Endpoint: https://ipapi.co/json/
Rate Limit: 1,000 requests per day
FreeAPI Link: https://findfreeapi.com/en/service/ipapico

Finance, Currency and Cryptocurrency

CoinPaprika
Unlike CoinMarketCap or CoinGecko which require developer signups and restricted API keys, CoinPaprika allows direct, keyless queries for live cryptocurrency prices, volume, and market tickers.

Endpoint: https://api.coinpaprika.com/v1/tickers
Rate Limit: Fair use (no rate wall)
FreeAPI Link: https://findfreeapi.com/en/service/coinpaprika

Frankfurter Exchange Rates
An open-source, keyless API tracking reference exchange rates published by the European Central Bank. Includes currency conversions and historical time-series data.

Endpoint: https://api.frankfurter.app/latest?from=USD&to=EUR
FreeAPI Link: https://findfreeapi.com/en/service/frankfurter

Entertainment, Gaming and Fun

PokeAPI
The gold standard for educational and portfolio apps. Highly detailed REST endpoints covering Pokemon stats, sprites, moves, and abilities.

Endpoint: https://pokeapi.co/api/v2/pokemon/ditto
Rate Limit: 100 requests per minute per IP
FreeAPI Link: https://findfreeapi.com/en/service/pokeapi

Open Trivia Database
A completely public database of multiple-choice trivia questions across science, history, video games, and pop culture. Ideal for building a live quiz game.

Endpoint: https://opentdb.com/api.php?amount=10
FreeAPI Link: https://findfreeapi.com/en/service/open-trivia-database

Cat Facts and Dog CEO
Lightweight endpoints delivering random facts and high-resolution animal pictures. Perfect for testing component image layouts or loading states.

Endpoint: https://dog.ceo/api/breeds/image/random
FreeAPI Link: https://findfreeapi.com/en/service/dog-ceo

AI and Generative Media

Pollinations AI
Generate images on the fly via URL prompts without registering for OpenAI or Midjourney.

Format: https://image.pollinations.ai/prompt/cyberpunk_neon_city_4k
Simply put that URL inside an image tag and it renders a generated image on demand.
FreeAPI Link: https://findfreeapi.com/en/service/pollinations-ai

Public Knowledge and Data

Nobel Prize API
Official linked data for all Nobel Prizes and Laureates since 1901. Includes affiliations, birthplaces, and citations.

Endpoint: https://api.nobelprize.org/2.1/laureates
FreeAPI Link: https://findfreeapi.com/en/service/nobel-laureates

World Universities API
A searchable directory of worldwide universities, domains, and country codes.

Endpoint: http://universities.hipolabs.com/search?country=United+States
FreeAPI Link: https://findfreeapi.com/en/service/world-universities

How to Bypass Localhost CORS Errors

When building frontend applications with React, Vue, or Next.js Client Components, calling external third-party endpoints often triggers browser CORS errors:
"Access to fetch has been blocked by CORS policy: No Access-Control-Allow-Origin header is present on the requested resource."

If an upstream public API has not enabled CORS headers for browser fetch, you do not need to build a custom backend just to test it. You can route your test request through the FreeAPI Edge CORS Gateway:

Simply prepend the gateway URL:
https://findfreeapi.com/api/v1/gateway?url=YOUR_ENCODED_ENDPOINT
It acts as a zero-latency edge reverse proxy that automatically attaches the required Access-Control-Allow-Origin header for your frontend prototyping.
Need More APIs? (Explore 500+ Verified Free APIs)

If you are looking for specific domains like Movie Databases (TMDB), Spotify alternatives, Sports scores, or AI LLMs, check out FreeAPI Directory:
https://findfreeapi.com/en

It is an open platform curating:

526+ actively verified free REST APIs across 47 categories.
Zero-Auth Filters: Instantly isolate APIs with no key requirements.
Live Sandbox: Ready-to-copy cURL, JavaScript, Node.js, and Python code.
17 In-Browser Dev Tools: Privacy-first PDF merger, compressor, WebP optimizer, UUID v7 generator, and SSL checker running 100% client-side via WebAssembly (zero server uploads): https://findfreeapi.com/en/tools
AI-Ready index (llms.txt): Machine-readable directory index for Cursor, Claude, and Perplexity users: https://findfreeapi.com/llms-full.txt

What is your favorite free API that you use for weekend hackathons or portfolio projects? Let me know in the comments!

DEV Community: Canpolat Kaya

30+ Free REST APIs You Can Call Without an API Key in 2026 (No Credit Card, Zero-Auth)