---
title: "List data-transformation functions"
method: GET
path: "/api/v1/egress-templates/transformations"
tags: ["EgressTemplate"]
---

# List data-transformation functions

`GET /api/v1/egress-templates/transformations`

Returns the catalog of data-transformation functions available for template columns, including each function's parameters, description, and example for the builder UI.

## Headers

- `tenant-id` string, required

## Response `200`

Transformation function catalog

## Other responses

- `401` — Not Authorized
- `403` — Not Allowed
- `502` — Transformation catalog temporarily unavailable

---

[API](https://skmtc.net/certifyos/apis/certify-api-layer.md) · [All operations](https://skmtc.net/certifyos/apis/certify-api-layer/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/certifyos/certify-api-layer/revisions/563848e0ecc0/schema)