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Dev Proxy

Dev Proxy is an API simulator by Microsoft that helps developers test their apps beyond the happy path by simulating API errors, rate limits, and slow responses without changing app code. It works on any platform and supports quick mock API stand-up to improve app robustness and user experience.
Latest: 0.29.2
Last checked: Feb 7, 2026 3:30pm
Rank: 5502/15140
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Overview

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License: Open source

Version & Lifecycle

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Current: 0.29.2 N-2: 0.29.0 Oldest supported: 0.27 Avg cadence: Every 28 days

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

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Also known as

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DevProxyMicrosoft Devproxy

Notes

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Latest known version is 0.27 as of May 2025. It includes features like TypeSpec generation, Nested App Authentication, and integration with language models. It is a command-line tool and open source.