Fake REST API
A fake REST API gives you working endpoints with sample resources so you can wire up CRUD calls before a real backend exists. JSONPlaceholder and DummyJSON are free and need no key; GoREST needs a key but supports full CRUD on users and posts, reseeded daily. For testing failure paths, flaky lets you force status codes, latency or failure rates through query parameters.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
DummyJSONFree placeholder REST API returning mock products, users, carts, posts and todos as JSON. Developer Tools › Mock & Test APIs | Free | None | JSON | Unlimited | Live |
FakeStoreAPIFake but realistic e-commerce data (products, carts, users, login) for prototyping shopping apps. Developer Tools › Mock & Test APIs | Free | None | JSON | Unlimited | Live |
flakyMock REST API for testing error handling: force status codes, latency or failure rates via query params. Developer Tools › Mock & Test APIs | Freemium | None | JSON | 10k+/day | Live |
Format JSON Online Dummy APIFree canned REST endpoints (users, products, orders, analytics) for frontend testing. Developer Tools › Mock & Test APIs | Free | None | JSON | Unlimited | Live |
GoRESTRealistic fake users, posts, comments and todos with full CRUD, reseeded daily, for testing and prototyping. Developer Tools › Mock & Test APIs | Free | API key | JSON | Unlimited | Live |
JSONingReady-made fake REST endpoints (products, users, carts, coupons) for prototyping frontends without a backend. Developer Tools › Mock & Test APIs | Free | None | JSON | — | Live |
JSONPlaceholderFake posts, comments, albums, photos, todos and users with relations; POST/PUT/PATCH/DELETE are simulated Developer Tools › Mock & Test APIs | Free | None | JSON | Unlimited | Live |
ReqResHosted mock REST API with fake user, order and post data for testing frontend code and QA automation. Developer Tools › Mock & Test APIs | Freemium | None | JSON | 100–1k/day | Live |
restful-api.devFake CRUD REST API with sample product data for testing and prototyping HTTP clients. Developer Tools › Mock & Test APIs | Freemium | None | JSON | <100/day | Live |
TotalShiftLeft SandboxSandbox with mock REST, GraphQL and SOAP endpoints plus 17 auth schemes for practicing API tests. Developer Tools › Mock & Test APIs | Free | None | JSON | 10k+/day | Live |
DummyJSONFreeLive
Free placeholder REST API returning mock products, users, carts, posts and todos as JSON.
None · JSON
Unlimited
no machine-readable spec
FakeStoreAPIFreeLive
Fake but realistic e-commerce data (products, carts, users, login) for prototyping shopping apps.
None · JSON
Unlimited
OpenAPI spec
flakyFreemiumLive
Mock REST API for testing error handling: force status codes, latency or failure rates via query params.
None · JSON
10k+/day
OpenAPI spec · llms.txt
Format JSON Online Dummy APIFreeLive
Free canned REST endpoints (users, products, orders, analytics) for frontend testing.
None · JSON
Unlimited
llms.txt
GoRESTFreeLive
Realistic fake users, posts, comments and todos with full CRUD, reseeded daily, for testing and prototyping.
API key · JSON
Unlimited
no machine-readable spec
JSONingFreeLive
Ready-made fake REST endpoints (products, users, carts, coupons) for prototyping frontends without a backend.
None · JSON
—
no machine-readable spec
JSONPlaceholderFreeLive
Fake posts, comments, albums, photos, todos and users with relations; POST/PUT/PATCH/DELETE are simulated
None · JSON
Unlimited
no machine-readable spec
ReqResFreemiumLive
Hosted mock REST API with fake user, order and post data for testing frontend code and QA automation.
None · JSON
100–1k/day
llms.txt
restful-api.devFreemiumLive
Fake CRUD REST API with sample product data for testing and prototyping HTTP clients.
None · JSON
<100/day
no machine-readable spec
TotalShiftLeft SandboxFreeLive
Sandbox with mock REST, GraphQL and SOAP endpoints plus 17 auth schemes for practicing API tests.
None · JSON
10k+/day
OpenAPI spec · llms.txt
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Choosing a Fake REST API API
Is there a free Fake REST API API?
Yes. JSONPlaceholder, DummyJSON, FakeStoreAPI, Format JSON Online Dummy API, GoREST and 2 others are free to use, and ReqRes, flaky and restful-api.dev have a free tier alongside paid plans.
Which Fake REST API work without an API key?
JSONPlaceholder, DummyJSON, ReqRes, FakeStoreAPI, flaky and 4 others need no key or sign-up, so you can try them with a plain request.
Can I call a Fake REST API API from front-end JavaScript?
JSONPlaceholder, DummyJSON, ReqRes, FakeStoreAPI, flaky and 3 others allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.
Can I use Fake REST API in a commercial project?
Format JSON Online Dummy API and TotalShiftLeft Sandbox permit commercial use. ReqRes restricts it, for example to non-commercial or attributed use, so read the terms first.
Which Fake REST API work with AI agents?
FakeStoreAPI, flaky and TotalShiftLeft Sandbox publish an OpenAPI spec for generating clients and tools.
Broader: Mock & Test APIs · Developer Tools APIs
More in Mock & Test APIs: Fake Store API · Random User APIs