# CUSTOM_FUNCTION CUSTOM_FUNCTION API Reference ## Retrieve By Id Report Functions - [GET /rest/2.0/CUSTOM_FUNCTION/{id}](https://bp-api-docs-v3.redocly.app/demogm_03_06_2025_schema_edited/custom_function/retrieve_by_id_custom_function.md): Get Report Functions By Id ## Retrieve Filtered Report Functions - [GET /rest/2.0/CUSTOM_FUNCTION](https://bp-api-docs-v3.redocly.app/demogm_03_06_2025_schema_edited/custom_function/retrievefiltered_custom_function.md): Get record(s) using filters ## Save Report Functions - [POST /rest/2.0/CUSTOM_FUNCTION](https://bp-api-docs-v3.redocly.app/demogm_03_06_2025_schema_edited/custom_function/post_custom_function.md): Save Report Functions ## Update Report Functions - [PUT /rest/2.0/CUSTOM_FUNCTION](https://bp-api-docs-v3.redocly.app/demogm_03_06_2025_schema_edited/custom_function/put_custom_function.md): Update Report Functions ## Delete Report Functions - [DELETE /rest/2.0/delete/CUSTOM_FUNCTION](https://bp-api-docs-v3.redocly.app/demogm_03_06_2025_schema_edited/custom_function/delete_custom_function.md): Delete Report Functions