---
schema_version: "1"
id: ac4a2da51c99812b83ac12160ac00342e123d277223a5854408771dd48eca51e
title: SLAS Support for Custom Parameters and Hooks
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/commerce-cloud/commerce-api/guides/slas-custom-parameters.md
canonical_url: https://developer.salesforce.com/docs/commerce/pwa-kit-managed-runtime/guide/slas-custom-parameters.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 0e4a70803ea4a44c63bd3b91f96bf97caf7eb6a41953cb72166a6c02f69bca36
products:
  - Composable Storefront
  - Salesforce APIs
---
# SLAS Support for Custom Parameters and Hooks

Custom parameters can be passed to the following SLAS endpoints:

- [`/login`](https://developer.salesforce.com/docs/commerce/commerce-api/references/auth?meta=authenticateCustomer). When applicable, SLAS passes custom parameters to the [OCAPI SHOP `/customers/auth` hooks](https://developer.salesforce.com/docs/commerce/commerce-api/guide/hook-method-details.html#authentication).
- [`/authorize`](https://developer.salesforce.com/docs/commerce/commerce-api/references/auth?meta=authorizeCustomer). When applicable, SLAS passes this information to 3rd party IDPs.

Make sure you prefix the parameter names with `c_`.

**note:** - For the `/login` endpoint, SLAS forwards custom `c_`-prefixed headers (with values matching [a-zA-Z0-9-._]) to the B2C Commerce platform.
- There are no SCAPI hooks for the `/login` and `/authorize` endpoints. `/login` runs `/customers/auth` hooks and `/authorize` runs no hooks.