# Cache Invalidation API endpoint - `DELETE /api/2/img/[IMAGE-URL]?auth=[API_SECRET]` ## Description Cache invalidation invalidates images cached on CDN and Pixboost 2nd level cache. Example: ```bash curl -X DELETE 'https://pixboost.com/api/2/img/http://www.midday.coffee/banner.jpeg?auth=ABCDEF' ``` ## Parameters API\_SECRET - [secret key](/workflows/api-secrets.md). ## Response 200 - Image has been invalidated. 202 - Invalidation process began and will finish soon. Usually it will take up to the 5 minutes. 401 - Failed authorization. Image domain is not in the list of [images sources](/setup/source-images/domain.md) ## Example You can find reference example of using cache invalidation workflow with S3 bucket [here](https://github.com/Pixboost/aws-s3-invalidate-cdn). ## Limitations Please, be aware that invalidations don't affect cached copies in web browser caches or caches operated by third-party Internet service providers. In most cases, using versioning on file names is a better option. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.pixboost.com/workflows/cache-invalidation.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.