---
title: "Create a new asset upload session."
method: POST
path: "/cm/v1/creative-assets"
tags: ["Creative"]
---

# Create a new asset upload session.

`POST /cm/v1/creative-assets`

Create a new asset upload session for the AdAccount. A URL would be returned in a successful response for uploading the actual asset content.
After asset upload has been successfully completed, see [the campaign creation guide](https://developer.moloco.cloud/docs/campaign-management-api) and follow [Section 4-1 for those using Moloco Ads API v1.7 or later](https://developer.moloco.cloud/docs/campaign-management-api#4-1-upload-a-creative-asset-to-storage-for-those-using-moloco-ads-api-v17-or-later)

## Query parameters

- `ad_account_id` string, required

## Request body

- CreateAssetUploadSessionRequestAssetUploadSessionInfo
  - `asset_kind` 'UNKNOWN_ASSET_KIND' | 'CREATIVE' | 'CSV' | 'ASSET_DYNAMIC_CREATIVE' | 'FB_PLAYABLE_AD', required — List of asset kinds supported by Moloco Ads. - UNKNOWN_ASSET_KIND: This value is not part of the specification. - CREATIVE: Creative asset type. - CSV: text/csv type. - ASSET_DYNAMIC_CREATIVE: Asset for Dynamic Creatives. - FB_PLAYABLE_AD: Facebook Playable AD.
  - `mime_type` string, required — MIME type of the asset to upload.

## Response `200`

A successful response.

- MessagesCreateAssetUploadSessionResponse — Response that contains information for the created asset upload session.
  - `asset_url` string — Actual URL to reach to the asset.
  - `content_upload_url` string — Temporal URL to upload the actual content of the asset. It will be expired in an hour. To update the asset content, follow [the instruction](https://developer.moloco.cloud/docs/campaign-management-api#4-1-upload-a-creative-asset-to-storage-for-those-using-moloco-ads-api-v17-or-later).

## Other responses

- `default` — Error. Detailed cause can be found in the `details` field.

---

[API](https://skmtc.net/moloco/apis/moloco-ads-campaign-management-api.md) · [All operations](https://skmtc.net/moloco/apis/moloco-ads-campaign-management-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/moloco/moloco-ads-campaign-management-api/revisions/5c85d0910ac0/schema)