Production fidelity
Response JSON field names, formats, and error shapes match the real services exactly. Point your SDK at a different base URL and everything else stays the same.
emulate
Local drop-in replacement services for CI and no-network sandboxes. Fully stateful, production-fidelity API emulation — not mocks.
Why emulate?
Fully stateful
A real in-memory store with CRUD, indexing, filtering, and pagination — state created by one API call is visible to the next. Not canned mocks.
Built for CI
No network, no external accounts, no flakes. Seed deterministic fixtures from a YAML config and reset between tests in milliseconds.
Korean services + popular APIs
Kakao, Naver, and Toss Payments alongside Firebase, Supabase, Asana, Linear, GitLab, PostHog, Spotify, WorkOS, X, and more.
Quick start
npx @pleaseai/emulateEvery service starts with sensible defaults — no config file needed. Ports are assigned sequentially from 4000 (Kakao) through4012 (X).