You do not need a credit card or a big budget to build real software in 2026. This guide rounds up 100+ genuinely free APIs across AI, weather, maps, finance, auth, email, payments, images, news, and sports, organized by category, with real free tier limits, auth requirements, and honest notes on where "free" quietly turns into "paid."
Table of Contents
- What Actually Counts as a Free API in 2026
- Quick Picks by Use Case
- AI and Machine Learning APIs
- Weather APIs
- Maps and Geolocation APIs
- Finance, Stocks and Crypto APIs
- Authentication and Identity APIs
- Email and Messaging APIs
- Payments APIs
- Images, Video and Media APIs
- News and Content APIs
- Sports APIs
- Public and Open Government Data APIs
- Developer Utility APIs
- API Testing and Documentation Tools
- How to Pick a Free API Without Getting Burned
- FAQs: Free APIs for Developers
What Actually Counts as a Free API in 2026
Before the list, a quick reality check, because the word "free" gets abused constantly in this space.
Free API offers generally come in three shapes.
No key, no auth, free forever. Open data, no signup, no card. The friendliest tier that exists. Examples: Open-Meteo, OpenStreetMap and Nominatim.
Free tier, permanent. Requires an API key, but the free quota resets every month or day and never expires on its own. Examples: Groq, Resend, Supabase, ROIC.ai.
Free trial or credit based. You get a time boxed credit balance, then it is gone. Often disguised as "free." Common with many AI model APIs and some mapping platforms.
The safest free APIs to build a real project on are the first two types. Trial credit APIs are fine for prototyping, but do not ship a production feature on top of one unless you have checked the pricing page the same week you deploy. Free tier terms change without notice, and "free forever" quietly becomes "free for 30 days" more often than vendors like to admit.
A genuinely good free API, in practice, should give you the following.
- No credit card required to get your first API key
- A clear, published rate limit, not fair use vagueness
- Real documentation with working code samples
- A free tier that scales with your project instead of expiring ahead of it
Keep that list in mind as you go. It will save you from building on sand.
Quick Picks by Use Case
| If you need | Start with | Why |
|---|---|---|
| Weather data | Open-Meteo | No key, no signup, covers forecast plus historical plus air quality |
| Fast LLM inference | Groq | 14,400 requests a day free, no card |
| Geocoding or maps | OpenStreetMap (Nominatim) | Free, open, no Google lock in |
| Transactional email | Resend | Clean API, great docs, generous free cap |
| Auth and user management | Supabase Auth | Full backend plus auth, free Postgres included |
| Payments | Stripe | Free to integrate, pay only on real transactions |
| Company financials and stock ratios | ROIC.ai | Free key, full endpoint access across 70+ exchanges |
| Stock photos | Unsplash or Pexels | No attribution required, commercial use OK |
| IP geolocation | ipinfo.io | 50,000 requests a month free |
AI and Machine Learning APIs
AI free tiers move faster than any other category on this list. Treat this section as a discovery map and double check limits before you build on one.
| API | Free tier | Auth | Best for |
|---|---|---|---|
| Groq | 14,400 requests a day, 30 requests a minute | API key, free, no card | Fast open model inference, Llama and Mixtral |
| Google Gemini API | Generous free quota for prototyping | API key | General purpose model with a clean SDK |
| OpenRouter | Rotating set of free suffixed models | No card, no phone | One API key, many models, easy comparison |
| Hugging Face Inference API | Free tier for model evaluation | API key | Thousands of open models, quick testing |
| Cloudflare Workers AI | Best free quota among edge AI providers | API key | Running inference close to your edge functions |
| GitHub Models | Free access inside your GitHub workflow | GitHub account | Trying frontier models without leaving your repo |
| AI Horde | Community powered, no account required | None | Image or text generation with zero signup friction |
| Ollama Cloud | Free on ramp, OpenAI compatible | No phone required | Self hosted style workflow without local GPU |
Free LLM API limits change monthly. Before you depend on one for production, check the provider's pricing page the same week you ship, not the week you first signed up.
Weather APIs
Weather is one of the highest intent categories for developers because the free tier limit itself is usually the deciding factor.
| API | Free tier | Auth | Best for |
|---|---|---|---|
| Open-Meteo | Unlimited for non commercial use, no key | None | The best free weather API with no key option: forecast, historical, air quality, marine, flood data |
| OpenWeatherMap | 1,000 calls a day on the free Weather API plan | API key | Current weather, 5 day or 3 hour forecast, geocoding |
| Weatherstack | Free tier with real time data | API key | Simple real time plus historical weather lookups |
| Weather.gov (NWS) | Free, unlimited, US only | None | US government grade forecasts and alerts |
OpenWeatherMap's free Weather API plan and its One Call 3.0 product are different offers with different quotas. Do not assume one covers the other.
Maps and Geolocation APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| OpenStreetMap and Nominatim | Free, open data geocoding | None | Forward and reverse geocoding without vendor lock in |
| Mapbox | Generous free monthly map loads | API key | Customizable vector maps, routing, navigation |
| Google Maps API | Free up to a monthly credit, card required | API key plus billing | Industry standard geocoding and Places data |
| OpenCage | Free tier for geocoding | API key | Clean, simple geocoding API with good docs |
| PositionStack | Free tier, forward and reverse geocoding | API key | Lightweight geocoding for smaller apps |
| ipinfo.io | 50,000 requests a month free | Token for detailed data | IP geolocation, ASN lookup, timezone detection |
| ip-api.com | Free for non commercial use | None | Quick IP to location and timezone lookups |
| GeoJS | Free, no published rate limits | None | IP geolocation with minimal friction |
Finance, Stocks and Crypto APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| ROIC.ai | Full API access on every plan, including free: 5 requests a minute and 2 years of history | API key, no credit card required | Pre calculated financial ratios (ROIC, ROE, debt to EBITDA), statements, valuation multiples, and earnings call transcripts across 70+ global exchanges, with JSON or spreadsheet ready TSV output |
| Alpha Vantage | Free API key, rate limited | API key | Real time plus historical equities and crypto data |
| Finnhub | Freemium, real time stock, forex, crypto plus news | API key | All in one market data with news sentiment |
| Twelve Data | Free tier for stock price lookups | API key | Simple, reliable stock price API |
| Polygon.io | Freemium | API key | Stocks, options, forex, and crypto market data |
| CoinGecko API | Free, generous public tier | None for basic use | Cryptocurrency prices, market cap, historical data |
| Frankfurter | Free, no key | None | Currency exchange rates and conversion |
| Marketaux | Free tier | API key | Financial news aggregation tied to tickers |
ROIC.ai is worth a closer look if you are building anything that touches fundamentals. Unlike most "free tier" financial APIs that lock entire endpoint categories behind a paid plan, ROIC.ai gives every plan, including the free one, full access to all tickers and every endpoint. The difference between plans is just rate limit and history depth, so a side project can genuinely run on the free key without hitting a feature wall, only a request volume ceiling. The getting started docs walk you through your first call in a few minutes over a plain REST and JSON interface. It also ships a hosted MCP server, which is a clean way to wire company financials directly into an AI coding assistant or agent instead of writing a custom fetch layer by hand.
Authentication and Identity APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| Supabase Auth | Free with the full Supabase stack: Postgres, storage, edge functions | API key | Full backend as a service with real auth, not just tokens |
| Auth0 | Free tier with published rate limits, for example 300 request burst on the Authentication API | Client ID and secret | Enterprise style auth, SSO, social login, on a budget |
| Clerk | Free tier for MAU based auth | API key | Drop in auth UI components for React and Next.js |
| Firebase Authentication | Free tier, generous for small apps | API key | Google ecosystem integration, quick setup |
Email and Messaging APIs
Free email API limits vary widely by provider. Daily sending caps, inbound webhook support, and retention windows all differ, so match the provider to the job, not just the biggest number on the homepage.
| API | Free tier | Auth | Best for |
|---|---|---|---|
| Resend | Solid monthly free cap, React Email support | API key | Modern transactional email with first class Next.js and React developer experience |
| Mailgun | Free tier available | API key | Reliable transactional plus marketing email |
| Amazon SES | Very low cost at scale, limited free allowance | AWS credentials | High volume sending once you outgrow smaller free tiers |
| Postmark | Free trial tier | API key | Fast, deliverability focused transactional email |
| Mailtrap | Free sandbox plus limited live sending | API key | Testing email flows before going to production |
| Cloudflare Email Workers | Free, usage based | API key | Lightweight inbound and outbound email routing on the edge |
| Twilio (SMS) | Free trial credit | API key | SMS and voice messaging for prototypes |
Payments APIs
| API | Free to integrate | Auth | Best for |
|---|---|---|---|
| Stripe | Yes, free until you process real transactions, then a per transaction fee | API key | The industry benchmark, full test mode for subscriptions, webhooks, refunds |
| PayPal API | Yes, pay per transaction | API key | Familiar checkout flow with broad consumer trust |
| Cashfree | Free integration, transaction based pricing | API key | Strong option for South Asian markets, UPI, cards, wallets |
| Lemon Squeezy | Free to integrate, revenue share on sales | API key | Merchant of record setup for indie SaaS and digital products |
Payments APIs are free in the same way almost every entry here is. There is no cost to build the entire flow in test mode. You only pay once real money moves, and that is a per transaction cut, not a subscription.
Images, Video and Media APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| Unsplash API | Free, high request limit for demo apps | API key | High quality stock photography, no attribution required |
| Pexels API | Free, commercial use allowed | API key | Free stock photos and videos |
| Pixabay API | Free | API key | Images, illustrations, and video assets |
| Lorem Picsum | Free, no key | None | Instant placeholder and mockup images by size, ID, or seed |
| Cloudinary | Free tier for image and video storage plus transformation | API key | On the fly image resizing, optimization, and delivery |
| Imgur API | Free tier | API key | Image hosting and sharing |
News and Content APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| NewsAPI.org | Free for development, limited for production | API key | Aggregated headlines across thousands of sources |
| World News API | Limited free quota | API key | Global news headlines in a simple JSON format |
| The Guardian Open Platform | Free, generous for non commercial use | API key | High quality journalism with full article access |
| NYT API | Free tier | API key | Archive search, article metadata, and more |
Sports APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| TheSportsDB | Free, open | API key, free | Team, league, and player metadata |
| Football-Data.org | Free tier with rate limits | API key | Live scores and fixtures for major football leagues |
| API-Football | Free tier with daily request cap | API key | Detailed stats across global football leagues |
| balldontlie API | Free, no key for basic use | Optional key | NBA stats and historical game data |
Public and Open Government Data APIs
| API | Free tier | Auth | Best for |
|---|---|---|---|
| data.gov | Free, open | Varies by dataset | US government datasets across every sector |
| World Bank API | Free, open | None | Global economic and development indicators |
| REST Countries | Free, no key | None | Country metadata, flags, currencies, languages, borders |
| public-apis (GitHub) | Free directory, 1,700+ APIs across 50+ categories | Not applicable | The master list to discover niche free APIs this guide does not cover |
Developer Utility APIs
Small, boring, and genuinely useful. The kind of API that saves you an afternoon of writing utility functions yourself.
| API | Free tier | Auth | Best for |
|---|---|---|---|
| QR Server API | Free, no key | None | Generate QR codes on the fly |
| ipify | Free, no key | None | Get your public IP address in one call |
| JSONPlaceholder | Free, unlimited | None | Fake REST API for frontend prototyping and testing |
| AbstractAPI | Free suite of 15 REST APIs: email validation, screenshots, phone validation, and more | API key | Covering common boring utility needs in one place |
| ApyHub | Free tier across dozens of micro utilities | API key | File conversion, text processing, and similar one off tasks |
API Testing and Documentation Tools
Not strictly APIs, but essential free tools for anyone building or consuming them.
| Tool | Free tier | Best for |
|---|---|---|
| Apidog | Up to 4 users, unlimited projects and requests | All in one API design, mocking, and testing |
| Postman | Free tier for individuals and small teams | The standard API client for testing and collections |
| Beeceptor | Free, no code API mocking | Quickly mocking REST and GraphQL endpoints for testing |
| Swagger and OpenAPI tools | Free, open source | Auto generated interactive API documentation |
How to Pick a Free API Without Getting Burned
Before you wire a free API into anything beyond a weekend project, run it through this short list.
- No credit card required to get a working API key.
- Published, specific rate limits, not vague fair use language.
- Clear docs with real code samples, not just an endpoint list.
- A changelog or status page showing the provider actively maintains it.
- A free tier that scales with you, so you are not forced into a cliff edge upgrade.
- Commercial use terms you have actually read, especially for anything client facing.
If an API fails two or more of these, it is fine for a prototype. Just do not build your startup's core feature on it without a backup plan.
What is the best free API for weather data? Open-Meteo is the strongest starting point in 2026. It requires no API key, has no hard rate limit for non commercial use, and covers current conditions, 7 day forecasts, historical weather, and air quality in one response. What is the best free API for AI and LLM projects? Groq currently offers one of the most generous genuinely free tiers, 14,400 requests a day, for fast LLM inference with no credit card required. OpenRouter is the best option if you want to compare multiple models through a single API key. What is the best free API for financial data and stock ratios? ROIC.ai stands out for anything that needs pre calculated ratios, financial statements, or earnings transcripts, because the free tier is not feature limited, only rate and history limited. Alpha Vantage and Finnhub are solid alternatives if your focus is raw price data rather than fundamentals. Are free APIs good enough for production apps? Yes, for low to moderate traffic. Many providers, including Resend, Supabase, Stripe, Open-Meteo, and ROIC.ai, run permanent free tiers that plenty of small to mid production apps never outgrow. The risk is not that free APIs are unreliable, it is that limits can change, so keep an eye on the provider's pricing page. Do free APIs always require a credit card? No. A growing number of providers, including Groq, OpenRouter, Open-Meteo, OpenStreetMap, Hugging Face, and ROIC.ai, let you get a working key with no card and, in several cases, no phone number either. What is the difference between a free tier and a free trial? A free tier is permanent. The same quota resets every billing cycle indefinitely. A free trial is time boxed or credit based and eventually runs out, even if the provider's marketing calls it free. Where can I find more free APIs beyond this list? The public-apis GitHub repository is the largest community maintained directory, listing 1,700+ free APIs across 50+ categories, and is a great next stop once you have exhausted this guide.Click to expand: FAQs about free APIs for developers
Closing Thoughts
The honest takeaway from researching this list is that there is more free API capacity available to developers in 2026 than most people realize. Between open data projects like Open-Meteo and OpenStreetMap, permanent free tiers from Groq, Resend, Supabase, and ROIC.ai, and pay only when you earn models like Stripe, you can genuinely build and ship a full stack product, AI features, auth, email, payments, financial data, and maps included, without spending a rupee until real users, and real revenue, show up.
Bookmark this page, keep a shortlist of two providers per category, and re verify limits before every major release. That one habit will save you more debugging time than any single API on this list.
If this list was useful, share it with a developer who is still paying for something that has a free alternative in here.
Top comments (0)