api-diff

What it does

Backend changes a field. Frontend breaks silently. TypeScript types go stale. Nobody notices until users complain. api-diff intercepts every fetch call and deep-diffs the actual response against a schema you define once. When something drifts, you know immediately. Supports wildcard routes, strict mode, granular ignore patterns, and an onDrift callback for Sentry or analytics. Zero dependencies. Full TypeScript support.

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  API Diff2022 · ▲161

  Diff two API versions in seconds and see what has changed

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• IR
  Intercept.rest – Faster API debugging2018 · ▲89

  Sharing an internal tool that accelerated my development work 10-fold, especially with API debugging. Thought fellow developers here might find it useful. As a developer, I often have trouble reproducing errors at the client end. https://intercept.rest lets me debug and monitor API requests and responses. It is similar to the Network tab in Chrome Developer Tools but works for any API: mobile apps, webhooks, frontend etc. After I shared it with a close circle of friends, they found it incredibly useful and even found new use cases, I never imagined. Been a long time lurker here and…

• TD
  Tusk Drift – Open-source tool for automating API testsNov 2025 · github.com · ▲56

  Hey HN, I'm Marcel from Tusk. We’re launching Tusk Drift, an open source tool that generates a full API test suite by recording and replaying live traffic. How it works: 1. Records traces from live traffic (what gets captured) 2. Replays traces as API tests with mocked responses (how replay works) 3. Detects deviations between actual vs. expected output (what you get) Unlike traditional mocking libraries, which require you to manually emulate how dependencies behave, Tusk Drift automatically records what these dependencies respond with based on actual user behavior and maintains recordings…

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  RealDiff – runtime behavior diffing for pull requests (six languages)10d ago · github.com · ▲40

  Runtime behavior diffs for pull requests. Contribute to issacnitin/RealDiff development by creating an account on GitHub.

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