> For clean Markdown of any page, append .md to the page URL.
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# Overview

## Docs

- [API upgrade guide](https://zuora.ferndocs.com/developers/api-reference/overview/api-upgrade-guide.md): Introduction about Zuora API changes and guide for upgrading to a later minor version.
- [API upgrades](https://zuora.ferndocs.com/developers/api-reference/overview/api-upgrades.md): Changelog for backward-incompatible changes made to the v1 API