> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://zuora.ferndocs.com/docs/platform/extensibility/custom-logic/function/use-cases-and-code-samples/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://zuora.ferndocs.com/_mcp/server.

# Use cases and code samples

## Docs

- [Validation function use cases](https://zuora.ferndocs.com/docs/platform/extensibility/custom-logic/function/use-cases-and-code-samples/validation-function-use-cases.md): Common use cases and code samples of validation function.
- [Formula function use cases](https://zuora.ferndocs.com/docs/platform/extensibility/custom-logic/function/use-cases-and-code-samples/formula-function-use-cases.md): Common use cases and code samples of formula function.