flaky

A mock REST API that fails on purpose

Free hosted mock REST API with JSONPlaceholder-compatible resources (users, posts, comments, albums, photos, todos, products). Query parameters on any endpoint force status codes (_status), latency (_delay), intermittent failures (_fail_rate), Retry-After headers, truncated JSON bodies, disabled CORS, and scripted failure sequences (_scenario). Writes are echoed unless a sandbox is used; sandboxes (free key required) persist writes for 24 hours. Also generates mock servers from custom JSON or an OpenAPI/Swagger spec.

Category: Testing & QA
Pricing: free
Free tier: yes
API: yes
MCP server: no
SDK: no
Open source: unknown

#mock-api #rest #testing #jsonplaceholder #error-simulation #openapi

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Listed 2026-10-20 · last verified 2026-10-20 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95

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API

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