Contact us / the line is open

APISimul is run by a handful of people, so an emailed message lands with someone who can act on it. Mention the tool and what you expected, and the reply will be specific rather than a canned response.

The tool behind this page is APISimul, a browser-based API mock simulator. Questions usually involve demoing a front end with no internet connection or a number that came out differently than expected, and both are useful to hear about.

Our inbox

Write to support@apisimul.com. Replies usually go out within a business day or two.

What to tell us

• The tool name or a link to it.
• The values you put in (the mock rules, status codes and response bodies you define), to whatever precision you remember.
• A short note on the expected versus actual output.
• Browser and device, whenever something looked broken.

If your question is about building a UI before the real API exists, say so in the first line — it helps us find the right answer for APISimul faster.

Reporting an error in a result

Accuracy matters more here than anything else. The method APISimul uses is stated on the tool's own page — the service worker registers a request handler that matches your rules by method and URL pattern, then returns the status code, latency and JSON body you configured before the request ever reaches the network — so a result that looks wrong usually means an input sat outside the model's assumptions, or a rounding boundary was hit. Send us the value you expected and the tool you used, and we will verify it against the formula.

Your message and your data

What you send is used for one thing — replying to you. It is not added to a mailing list and it is not shared with anyone else. See our privacy policy for the full picture.