Assistant · Vendor site 2026-10-04
flaky is a free mock REST API with realistic sample data where you control failure behavior from the query string. You can force status codes, inject latency, set intermittent fail rates, and run scripted success or failure sequences to test retries, loading states, and circuit breakers without touching production services.
Backend and mobile developers who need controllable fake HTTP APIs for integration tests, error handling, and resilience experiments.
Higher usage tiers require requesting an API key rather than anonymous access alone.
flaky serves realistic REST data at normal URLs while letting you force errors, delays, and flaky behavior from the query string or scripted scenarios.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Query-string controls | Every endpoint accepts _status, _delay, and _fail_rate parameters to simulate slow or failing responses. | Facts sourced | 2026-10-04 |
| Scenario sequences | POST /v1/scenario creates scripted fail or succeed sequences referenced by _scenario on later requests. | Facts sourced | 2026-10-04 |
| JSONPlaceholder compatibility | Marketing copy notes the same resources and fields as JSONPlaceholder for easy migration. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
Homepage states the API is free with no signup required to read, and an API key takes one request if you want a higher limit.
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Explore toolThe practical questions
flaky is a free mock REST API with realistic sample data where you control failure behavior from the query string. You can force status codes, inject latency, set intermittent fail rates, and run scripted success or failure sequences to test retries, loading states, and circuit breakers without touching production services.
Homepage states the API is free with no signup required to read, and an API key takes one request if you want a higher limit.. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Public REST endpoints documented on the homepage playground, including scenario endpoints for scripted fail or succeed sequences.. API access and subscription access may have different terms; consult the linked sources.
Higher usage tiers require requesting an API key rather than anonymous access alone.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.