
MockBase
Hosted mock APIs with fault injection and stateful mocks
I kept running into the same problem: every mock API tool I tried
covered the happy path fine, then fell apart the moment I actually
needed to test what my client did when the real API misbehaved —
timeouts, flaky 500s, rate limits, malformed responses. I'd either
hand-roll that in test code every time, or just skip it and hope. So I
built MockBase, a hosted mock API tool built around the opposite
assumption: failure is the interesting case, not an afterthought. You
can define REST, GraphQL, or SOAP endpoints with conditional responses
based on query params, headers, or body content, inject failure on
purpose through weighted chaos scenarios and deterministic rate-limit
simulation so you can reproduce a specific failure instead of hoping
one happens, keep state across requests for flows that aren't
single-request, import an existing OpenAPI spec instead of building
from scratch, and every change keeps version history with diffs so
changing a mock under a teammate doesn't silently break their tests.
It's a side project, currently in beta — every signed-in account gets
the full feature set for free while I validate it before I think about
charging anyone. I'd genuinely like feedback from other founders here:
if you mock APIs today for frontend dev, contract testing, or CI, is
failure/chaos testing something you've wanted and skipped, or a solved
problem for you already? And if you've dealt with self-promotion
fatigue on IH, any advice on how much of this kind of post is too
much?
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Every mock API tool I'd used covered the happy path fine and fell apart the moment I needed to test what my client did when the API misbehaved — timeouts, flaky errors, rate limits, malformed responses. I'd end up hand-r

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