JSONPlaceholder Alternative — With Real Persistence
JSONPlaceholder is great for read-only fakes, but POST / PATCH / DELETE pretend to work and discard your data. The TotalShiftLeft sandbox actually persists writes within your session — and adds GraphQL, SOAP, Swagger and auth on top.
How they compare
| Feature | JSONPlaceholder | TotalShiftLeft Sandbox |
|---|---|---|
| Free, no signup | Yes | Yes |
| GET / read endpoints | Yes | Yes |
| POST / PATCH / DELETE actually persist | No (fake) | Yes (session-scoped) |
| Pagination + filtering | Limited | Yes (page, limit, filters) |
| GraphQL API on same data | No | Yes |
| SOAP API on same data | No | Yes |
| OAuth2 / JWT / API-key auth | No | Yes |
| Swagger UI / OpenAPI 3.0 spec | No | Yes |
| Error simulation (?error=500, ?delay=2000) | No | Yes |
| WebSocket / real-time updates | No | Roadmap |
When JSONPlaceholder is the right choice
If you only need read-only sample data for a UI prototype and you do not care that POST returns a fake id, JSONPlaceholder is fine — it has been around since 2010 and it is rock-solid for that one job.
When you'll outgrow it (and want this sandbox instead)
- You need to test write flows end-to-end — create, update, delete, then re-read
- You're learning or teaching OAuth2, JWT, or API-key auth
- You want the same data behind REST, GraphQL and SOAP for protocol comparison
- You're evaluating Swagger UI / OpenAPI 3.0 tooling
- You need to test error handling and retries under controlled failure
- You're running QA automation (RestAssured, Karate, Cypress, Playwright) and need realistic fixtures
Drop-in URL mapping
| JSONPlaceholder URL | This sandbox URL |
|---|---|
| https://jsonplaceholder.typicode.com/users | https://demo.totalshiftleft.ai/api/v1/users |
| https://jsonplaceholder.typicode.com/posts | https://demo.totalshiftleft.ai/api/v1/posts |
| https://jsonplaceholder.typicode.com/users/1 | https://demo.totalshiftleft.ai/api/v1/users/1 |
Most JSONPlaceholder clients work after just changing the base URL.
Frequently asked questions
Is JSONPlaceholder going away?
Not as far as we know. This is an alternative for cases where you need real persistence, auth or multi-protocol — not a replacement for read-only mocking.
Does my data leak to other users?
No. Each session has an isolated data store keyed by your session cookie or x-session-id header. Data auto-expires after 30 minutes of inactivity.
Is the OpenAPI spec compatible with JSONPlaceholder clients?
Endpoint shapes and response envelopes differ slightly (we add success/data wrappers). Most clients adapt with a small response interceptor.
Other free public APIs in this sandbox
Open the live sandbox — REST, GraphQL, SOAP and auth in one place. No signup, no API key.
Open the API Sandbox →Topics: JSONPlaceholder alternative · alternative to JSONPlaceholder · free REST API like JSONPlaceholder · JSONPlaceholder with auth · JSONPlaceholder with persistence