> For the complete documentation index, see [llms.txt](https://help.aristotlemetadata.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aristotlemetadata.com/special-features/harvester/managing-custom-transformation-services.md).
# Managing custom transformation services
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Custom transformation services can only be managed by registry Administrators
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Before a harvest configuration can be created, it needs to be assigned a transformation service. These services tie harvest configurations to OAI-PMH prefixes.
### How to manage custom transformation services
1. Select 'Administrator tools' from the dashboard side panel.
2. Select 'Manage Harvester Tasks'.
3. Select 'Manage Custom Transformation Services'.
**Note:** This will open the 'Custom Transformation Service List' page in a new window.
4. **If you wish to add a new custom transformation service**, select 'Add new custom transformation service'.
5. Populate the 'Service Name' field as desired.
6. Enter the transformation service URL you wish to use in the 'Service URL' field.
7. Select the '+' to add a new supported prefix.
**Note:** The '-' can be selected to remove a supported prefix.
8. Populate the 'Supported Prefixes' field with an appropriate, supported OAI-PMH prefix.
9. Select 'Add Service'.
10. The transformation service will be added to the 'Custom Transformation Service List' page, and can now be used in the creation of a new harvest configuration. From the 'Custom Transformation Service List' page, transformation services can be both edited and deleted by selecting 'Edit' and 'Delete' respectively.
