Dev Proxy

@devproxy.bsky.social

93 Followers 9 Following

Dev Proxy is an API simulator that helps you effortlessly test your app beyond the happy path: - mock APIs - simulate API behaviors like errors, throttling or rate limiting - emulate latency - generate OpenAPI specs ...and more! https://aka.ms/devproxy

Screenshot showing mock data setup for a Microsoft Graph API response. On the left, a JSON file defines a mock GET response for https://graph.microsoft.com/v1.0/me, with user details like name and email. On the right, the terminal displays the mocked response being served from a local proxy.

Terminal screenshot showing OpenAIMockResponsePlugin in use, with commands to run/stop proxy and a POST request to OpenAI API. Red arrows highlight 'Call cloud LLM' and 'Get local response'.

Side-by-side terminal views showing a successful Playwright test run with Dev Proxy integration. The left panel logs HTTP server startup on port 3000 and test results with 3 passed tests. The right panel logs Dev Proxy activity, including mocked API responses and request delays.

GitHub Actions workflow run showing successful completion of the "Dev Proxy integration with Playwright" job. It includes Playwright test execution with 3 passing tests and detailed Dev Proxy logs indicating mocked HTTP requests to api.blog.com/posts.

Terminal screenshot showing a setup where cloud LLM requests (to OpenAI Azure) are intercepted and mocked locally using devproxy. Arrows and labels highlight the original cloud call and the redirected local response, demonstrating how to test LLM responses offline.

Screenshot of a JSON configuration snippet used for a mock API setup. It includes a $schema key pointing to a GitHub URL, a baseUrl for the Northwind customers API, and a reference to a customers-data.json file. The actions array includes two objects: one for a getAll action and another for a getOne action with a dynamic URL path and a query filtering by CustomerID. Red annotations label “Dummy data” pointing to the JSON file, “URL” pointing to the base URL, and “Actions” pointing to the action definitions.

Dev Proxy Start and Stop commands displayed in VSCode tasks.json file

Screenshot of a terminal showing intercepted API requests to GitHub. A highlighted warning indicates a repeated request to the same endpoint within 5 seconds, suggesting the use of caching to reduce API calls. Two red arrows with labels point to parts of the image: one labeled "Get feedback" pointing to the warning message, and another labeled "Use your app" pointing to a curl command making a request through a local proxy.

Screenshot of a GitHub release page for version v0.26.1 by user garrytrinder. The release includes a fix for false upgrade notifications when the latest Dev Proxy version is already installed. The contribution was made by @copilot-swe-agent in pull request #288, marking their first contribution.