> ## Documentation Index
> Fetch the complete documentation index at: https://dify-6c0370d8-docs-new-agent-experience.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Reverse Invocation of Dify Services

> Call App, Model, Tool, and Node services in the Dify platform from your plugin

Through reverse invocation, plugins can call services within the main Dify platform to extend their capabilities.

## Callable Dify Modules

* **[App](/en/develop-plugin/features-and-specs/advanced-development/reverse-invocation-app)**: Access data from Apps within the Dify platform.
* **[Model](/en/develop-plugin/features-and-specs/advanced-development/reverse-invocation-model)**: Invoke LLM capabilities within the Dify platform, including all model types and functions such as TTS and Rerank.
* **[Tool](/en/develop-plugin/features-and-specs/advanced-development/reverse-invocation-tool)**: Call other tool-type plugins within the Dify platform.
* **[Node](/en/develop-plugin/features-and-specs/advanced-development/reverse-invocation-node)**: Call nodes within a specific Chatflow/Workflow application in the Dify platform.

## Related Resources

* [Develop Extension Plugins](/en/develop-plugin/dev-guides-and-walkthroughs/endpoint) - Learn how to develop plugins that integrate with external systems
* [Develop a Slack Bot Plugin](/en/develop-plugin/dev-guides-and-walkthroughs/develop-a-slack-bot-plugin) - An example of using reverse invocation to integrate with the Slack platform
* [Bundle Type Plugins](/en/develop-plugin/features-and-specs/advanced-development/bundle) - Learn how to package multiple plugins that use reverse invocation
* [Using Persistent Storage](/en/develop-plugin/features-and-specs/plugin-types/persistent-storage-kv) - Enhance plugin capabilities through KV storage