Explore free Test Data APIs available for developers. Browse our collection of public APIs in the Test Data category, each verified and documented for easy integration into your projects.
Last verified: November 12, 2026
| Name | Description | Auth | HTTPS | CORS | Uptime (30 days) |
|---|---|---|---|---|---|
| AddressMock | Random US, Hong Kong and Cape Verde addresses with matched city, state and ZIP | none | Yes | yes | 100% (5 checks) |
| Bacon Ipsum | A Meatier Lorem Ipsum Generator | none | Yes | unknown | 100% (5 checks) |
| DummyJSON | Fake REST API with products, users, posts, comments, todos and more | none | Yes | yes | 100% (5 checks) |
| English Random Words | Generate English Random Words with Pronunciation | none | Yes | no | 100% (5 checks) |
| FakeStoreAPI | Fake store rest API for your e-commerce or shopping website prototype | none | Yes | unknown | 100% (5 checks) |
| flaky | Fake REST API with chaos controls: force any status code, add latency, or a failure rate | none | Yes | yes | 100% (5 checks) |
| GeneradorDNI | Data generator API. Profiles, vehicles, banks and cards, etc | apikey | Yes | unknown | 100% (5 checks) |
| JsonFabrica | Generate realistic relational synthetic JSON test data from reusable templates | apikey | Yes | unknown | 100% (5 checks) |
| JSONing | Fake REST API for prototyping | none | Yes | yes | 100% (5 checks) |
| loremfile | Hotlinkable CC0 sample files in 78 formats, each with a SHA-256 in a JSON manifest | none | Yes | yes | 100% (5 checks) |
| Mailsac | Disposable Email | apikey | Yes | unknown | 100% (5 checks) |
| Mockae | Fake REST API powered by Lua | none | Yes | yes | 100% (5 checks) |
| Mockaroo | Generate fake data to JSON, CSV, TXT, SQL and XML | apikey | Yes | unknown | 100% (5 checks) |
| NovaFortix Dev | Zero-auth REST endpoints for mock user profiles, UUIDs and HTTP status codes | none | Yes | yes | 100% (5 checks) |
| Randommer | Random data generator | apikey | Yes | yes | 100% (5 checks) |
| restful-api | Fake REST API for testing and prototyping with CRUD endpoints | none | Yes | no | 100% (5 checks) |
| Supercrontab Mock Endpoints | Mock endpoints in 8 formats, each returning any of 14 HTTP status codes | none | Yes | yes | 100% (5 checks) |
| TestingAPIs | Free fake REST API with products, posts, todos, any HTTP status code and request echo | none | Yes | yes | 100% (5 checks) |
| TotalShiftLeft Sandbox | Free multi-protocol sandbox: REST, GraphQL & SOAP with OAuth2/JWT auth and OpenAPI 3.0 spec | none | Yes | yes | 100% (5 checks) |
| UUID Generator | Generate UUIDs | none | Yes | no | 100% (5 checks) |
| What The Commit | Random commit message generator | none | No | yes | 100% (5 checks) |
| Yes No | Generate yes or no randomly | none | Yes | unknown | 100% (5 checks) |
17 of these APIs require no authentication — you can start making requests immediately without signing up for an account. Just pick one from the table above, check its documentation, and send your first request.
5 APIs in this category require a free API key. This usually means creating a free account on the provider's website and copying your key from the dashboard. The process typically takes less than a minute.
Not sure where to start? Check the uptime column: it shows how often each API's documentation responded to our daily checks over the last 30 days, and the dot shows whether it responded at the latest check. For browser-based projects, check that the API supports CORS.
Yes, all APIs listed on API Bouncer have a free tier. Some are completely open (no sign-up needed), while others require a free account to get an API key. Free tiers typically have rate limits — check each API's documentation for specifics.
It depends on your needs. Consider: Do you need authentication or prefer no-auth? Does your project need CORS support for browser access? How many requests will you make? Start with a no-auth API to prototype quickly, then switch to a more feature-rich option if needed.
We run periodic health checks on all listed APIs. The "Status" column shows whether each API was responding at our last check. APIs marked as "alive" were recently verified. You can also test any API yourself using curl or our guides on testing APIs.
Most free APIs allow commercial use, but terms vary by provider. Always check the specific API's terms of service. Some APIs have separate free and commercial tiers with different rate limits.
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