Generate an OpenAPI spec for any API
This sample contains a preset that allows you to generate an OpenAPI spec for any API. By specifying the URLs of the API for which you want to generate an OpenAPI spec, Dev Proxy will intercept all requests to that API and generate an OpenAPI spec based on the requests and responses.
Generate an OpenAPI spec for any API
Summary
This sample contains a preset that allows you to generate an OpenAPI spec for any API. By specifying the URLs of the API for which you want to generate an OpenAPI spec, Dev Proxy will intercept all requests to that API and generate an OpenAPI spec based on the requests and responses.

Compatibility
Contributors
Version history
| Version | Date | Comments |
|---|---|---|
| 1.4 | February 4, 2026 | Updated to Dev Proxy v2.1.0 |
| 1.3 | January 18, 2026 | Moved config files to .devproxy folder |
| 1.2 | January 5, 2026 | Updated to Dev Proxy v2.0.0 |
| 1.1 | June 27, 2025 | Updated to Dev Proxy v0.29.2 |
| 1.0 | January 29, 2024 | Initial release |
Minimal path to awesome
- Get the sample:
-
Download just this sample:
npx gitload-cli https://github.com/pnp/proxy-samples/tree/main/samples/any-generate-openapi-specor
-
Download as a .ZIP file and unzip it, or
-
Clone this repository
-
- Start Dev Proxy specifying the URL of the API for which you want to generate an OpenAPI spec, eg.
devproxy --urls-to-watch "https://api.contoso.com/*" --record - Use your application to issue API requests
- Stop Dev Proxy
- Open the generated OpenAPI spec in the current working folder
Features
This is a generic preset for generating OpenAPI specs for any API. The preset doesn’t contain a URL and requires you to specify the URL using the --urls-to-watch, -u option.
For more information about the configuration options, see the documentation of the OpenApiSpecGenerator.
Help
We do not support samples, but this community is always willing to help, and we want to improve these samples. We use GitHub to track issues, which makes it easy for community members to volunteer their time and help resolve issues.
You can try looking at issues related to this sample to see if anybody else is having the same issues.
If you encounter any issues using this sample, create a new issue.
Finally, if you have an idea for improvement, make a suggestion.
Disclaimer
THIS CODE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.