---
title: "Add credential lists to SIP trunk"
method: POST
path: "/v1/projects/{projectId}/trunks/{trunkId}/credentialLists"
tags: ["SIP Trunks"]
---

# Add credential lists to SIP trunk

`POST /v1/projects/{projectId}/trunks/{trunkId}/credentialLists`

## Request

- Base URL: `https://elastic-trunking.api.sinch.com`
- URL: `https://elastic-trunking.api.sinch.com/v1/projects/{projectId}/trunks/{trunkId}/credentialLists`
- Auth: one of:
  - HTTP basic
  - OAuth 2
    - Client credentials
    - Token URL: `https://auth.sinch.com/oauth2/token`

Add credential lists to a specified SIP trunk.

## Request body

- CredentialListIds
  - `credentialListIds` string[], required

## Response `200`

OK

- CredentialListIds
  - `credentialListIds` string[], required

## Changes

- **2026-10-01** `108d6bcb3948`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/sinch/apis/elastic-sip-trunk-api/changes/v1/projects/:projectId/trunks/:trunkId/credentialLists/post.md)

---

[API](https://skmtc.dev/sinch/apis/elastic-sip-trunk-api.md) - [All operations](https://skmtc.dev/sinch/apis/elastic-sip-trunk-api/llms.txt) - [OpenAPI document](https://skmtc.dev/sinch/apis/elastic-sip-trunk-api/revisions/8f15a650c7cd?raw)