diff --git a/docs/usage/information_provider_system.md b/docs/usage/information_provider_system.md
index aaf34d9c..d224ee06 100644
--- a/docs/usage/information_provider_system.md
+++ b/docs/usage/information_provider_system.md
@@ -85,4 +85,12 @@ Following env configuration options are available:
 To create a custom provider, you have to create a new class implementing the `InfoProviderInterface` interface. As long as it is a valid Symfony service, it will be automatically loaded and can be used.
 Besides some metadata functions, you have to implement the `searchByKeyword()` and `getDetails()` functions, which do the actual API requests and return the information to Part-DB.
 See the existing providers for examples.
-If you created a new provider, feel free to create a pull request to add it to the Part-DB core.
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+If you created a new provider, feel free to create a pull request to add it to the Part-DB core.
+
+## Result caching
+To reduce the number of API calls against the providers, the results are cached:
+* The search results (exact search term) are cached for 7 days
+* The product details are cached for 4 days
+
+If you need a fresh result, you can clear the cache by running `php .\bin\console cache:pool:clear info_provider.cache` on the command line. 
+The default `php bin/console cache:clear` also clears the result cache, as it clears all caches.
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