---
title: "Create Subprojects"
method: POST
path: "/Accounts"
tags: ["Accounts"]
---

# Create Subprojects

`POST /Accounts`

Creates a subproject beneath the project used to authenticate the request and returns it as an Account. Use this route for integrations built around Account SIDs and form-encoded requests; use [Create a subproject](/docs/apis/rest/projects/create-subproject) for a JSON request.

#### Permissions

The API token used to authenticate must have the following scope(s) enabled to make a successful request: _Management_.

[Learn more about API scopes](/docs/platform/your-signalwire-api-space).

## Response `201`

Response containing a newly created subproject account.

- Account — Account/Project model representing a SignalWire project.
  - `sid` string, uuid, required — Universal Unique Identifier.
  - `friendly_name` string, required — The name of the Project.
  - `status` 'active', required — The status of the Project.
  - `auth_token` string, required — The authorization token for this Project. Always returns 'redacted' for security.
  - `date_created` string, required — The date and time this Project was created, in RFC 2822 format.
  - `date_updated` string, required — The date and time this Project was last updated, in RFC 2822 format.
  - `type` 'Full', required — The type of the Project.
  - `owner_account_sid` string, uuid, required — Universal Unique Identifier.
  - `region_preference` string, required — The preferred region for the Project.
  - `uri` string, required — The URI for the Project.
  - `subproject` boolean, required — Whether this project is a sub-project of another project.
  - `signing_key` string, nullable, required — The signing key for the Project. Only returned once when a subproject is created. Subsequent requests return null.
  - `subresource_uris` SubresourceUris, required — A Map of sub-resources that are linked to the given Project.
    - `addresses` unknown, required
    - `available_phone_numbers` string, required — URI for available phone numbers.
    - `applications` string, required — URI for applications.
    - `authorized_connect_apps` unknown, required
    - `calls` string, required — URI for calls.
    - `conferences` string, required — URI for conferences.
    - `connect_apps` unknown, required
    - `incoming_phone_numbers` string, required — URI for incoming phone numbers.
    - `keys` unknown, required
    - `notifications` unknown, required
    - `outgoing_caller_ids` unknown, required
    - `queues` string, required — URI for queues.
    - `recordings` string, required — URI for recordings.
    - `sandbox` unknown, required
    - `sip` unknown, required
    - `short_codes` unknown, required
    - `messages` string, required — URI for messages.
    - `transcriptions` string, required — URI for transcriptions.
    - `usage` unknown, required

## Other responses

- `400` — The request was invalid or cannot be processed. Check the error details for more information.
- `401` — Authentication failed. Please verify your credentials and try again.
- `422` — The request could not be processed due to validation errors. Check the error details for more information.

## Changes

- **2026-05-12** `2916d5e3072e` — 2 breaking, 2 info
  - the `owner_account_sid` response's property type/format changed from `string`/`uuid` to ``/`` for status `201`
  - the `sid` response's property type/format changed from `string`/`uuid` to ``/`` for status `201`
  - added `#/components/schemas/uuid` to the `owner_account_sid` response property `allOf` list for the response status `201`
  - added `#/components/schemas/uuid` to the `sid` response property `allOf` list for the response status `201`
- **2026-05-12** `5344c0c93a4c` — 1 breaking, 5 info
  - added 'unevaluatedProperties' constraint to the request body
  - added 'unevaluatedProperties' constraint to the response body for the status `201`
  - added 'unevaluatedProperties' constraint to the response body for the status `400`
  - added 'unevaluatedProperties' constraint to the response body for the status `401`
  - …2 more
- **2026-03-04** `2e516ba2383f` — 1 breaking
  - response property `signing_key` list-of-types was widened by adding types `null` to media type `application/json` of response `201`
- …earlier changes not shown

[Full history](https://skmtc.dev/signalwire/apis/compatibility-api/changes/Accounts/post.md)

---

[API](https://skmtc.dev/signalwire/apis/compatibility-api.md) · [All operations](https://skmtc.dev/signalwire/apis/compatibility-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/signalwire/compatibility-api/revisions/723316346320/schema)