Test Data APIs let you add test data capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| AddressMock API Random US, Hong Kong and Cape Verde addresses with matched city, state and ZIP | Free | API Key | Yes | Profile | |
| Bacon Ipsum A Meatier Lorem Ipsum Generator | Free | No | No | Profile | |
| Beeceptor Build a mock Rest API endpoint in seconds | Freemium | No | No | Profile | |
| Dicebear Avatars Generate random pixel-art avatars | Free | No | No | Profile | |
| DummyJSON Generate dummy data in JSON format | Free | API Key | Yes | Profile | |
| English Random Words API Generate English Random Words with Pronunciation | Unknown | Unknown | No | Profile | |
| FakeJSON API Service to generate test and fake data | Unknown | API Key | Yes | Profile | |
| FakeStoreAPI Fake store rest API for your e-commerce or shopping website prototype | Free | No | Yes | Profile | |
| Faker Generate massive amounts of fake (but realistic) data for testing and development. | Free | No | No | Profile | |
| FakerAPI APIs collection to get fake data | Free | No | No | Profile | |
| Format JSON Online Dummy API – A free tool to generate dummy JSON data for testing and prototyping. | Free | No | Yes | Profile | |
| GeneradorDNI Data generator API. Profiles, vehicles, banks and cards, etc | Free | API Key | No | Profile | |
| Gorest Online REST API for Testing and Prototyping | Free | OAuth | No | Profile | |
| ItsThisForThat Generate Random startup ideas | Free | No | No | Profile | |
| JSONPlaceholder Fake data for testing and prototyping | Free | No | Yes | Profile | |
| JSONing Fake REST API for prototyping | Free | No | No | Profile | |
| Loripsum The "lorem ipsum" generator that doesn't suck | Free | No | Unknown | Profile | |
| Mailsac Disposable Email | Free | API Key | Yes | Profile | |
| Metaphorsum Generate demo paragraphs giving number of words and sentences | Free | No | No | Profile | |
| Mockae Fake REST API powered by Lua | Free | No | No | Profile | |
| Mockaroo Generate fake data to JSON, CSV, TXT, SQL and XML | Free | API Key | No | Profile | |
| Random Identity Random Identity Generator with custom response format | Free | API Key | No | Profile | |
| RandomUser Generates and list user data | Free | No | Yes | Profile | |
| Randommer Random data generator | Free | API Key | Yes | Profile | |
| ReqRes A hosted REST-API ready to respond to your AJAX requests | Free | No | No | Profile | |
| RoboHash Generate unique robot, alien, and monster avatars from any username or text input. | Free | No | Yes | Profile | |
| Spanish random names API Generate spanish names (with gender) randomly | Unknown | Unknown | Unknown | Profile | |
| This Person Does not Exist Generates real-life faces of people who do not exist | Free | No | No | Profile | |
| UUID Generator Generate UUIDs | Free | No | No | Profile | |
| What The Commit Random commit message generator | Free | No | Yes | Profile | |
| Yes No Generate yes or no randomly | Free | No | Yes | Profile | |
| restful-api Fake REST API for testing and prototyping with CRUD endpoints | Unknown | API Key | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.