---
title: "Add additional projects to EST"
method: POST
path: "/v1/projects/{projectId}/addProjects"
tags: ["Projects"]
---

# Add additional projects to EST

`POST /v1/projects/{projectId}/addProjects`

## Request

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

Programmatically add additional projects for use with Elastic SIP Trunking. If you list a project ID which EST is already aware of, it will be ignored.

## Request body

- object
  - `projectIds` string[], required: The project IDs you want to add.

## Response `200`

The list of added projects.

- object
  - `addedProjects` string[]: The added project IDs.

## Changes

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

[Operation history](https://skmtc.dev/sinch/apis/elastic-sip-trunk-api/changes/v1/projects/:projectId/addProjects/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)