Postman Echo Alternative — With Real Resources
Postman Echo is excellent for inspecting headers, cookies and request bodies — but it has no resources to CRUD against. This sandbox keeps the request-inspection feel while adding real users, products, orders and auth.
What each is for
| Use case | Postman Echo | TotalShiftLeft Sandbox |
|---|---|---|
| Inspect what your client sent (headers, cookies, body) | Yes (best-in-class) | Yes (via /api/v1/echo) |
| Real resources to CRUD against | No | Yes |
| Auth flows (Bearer / OAuth2 / API key) | Limited (Basic, Digest) | Bearer, OAuth2, API key, JWT, refresh |
| GraphQL endpoint | No | Yes |
| SOAP endpoint with WSDL | No | Yes |
| Swagger UI / OpenAPI 3.0 | No | Yes |
| Error simulation | Status code endpoints | Per-endpoint via ?error= / ?delay= |
Best of both worlds
Use Postman Echo when you just want to confirm what your client serializes onto the wire. Use this sandbox when you need to script an end-to-end flow: log in → list products → create order → fetch order → cancel order.
Import into Postman in 30 seconds
- Postman → Import → Link →
https://demo.totalshiftleft.ai/openapi.json - Every endpoint becomes a request, with example bodies pre-filled
- Open Authorization on the collection → choose Bearer Token → run
POST /auth/tokenfirst to populate it
Frequently asked questions
Does this replace Postman Echo entirely?
No — Postman Echo is still the best tool for raw request inspection. We complement it for full API workflows.
Can I echo my request here too?
Yes — POST /api/v1/echo returns the headers, query, body and method it received.
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: Postman Echo alternative · free API for Postman · Postman test API · public API like Postman Echo · Postman practice API