---
title: "Reserve ordinary media or an auxiliary YouTube thumbnail"
method: POST
path: "/company/post-groups/{postGroupId}/media/reservations"
tags: ["Company Publishing"]
---

# Reserve ordinary media or an auxiliary YouTube thumbnail

`POST /company/post-groups/{postGroupId}/media/reservations`

## Request

- Base URL: `https://api.publora.com/api/v1`
- URL: `https://api.publora.com/api/v1/company/post-groups/{postGroupId}/media/reservations`
- Auth: API key in header `x-publora-key`

Agency/Company path. Discover available formats using Company /platforms. Uses the caller’s current Company Workspace permissions.

## Headers

- `x-publora-client` string
- `X-Publora-Workspace-Id` string, required
- `Idempotency-Key` string, required

## Request body

- CompanyMediaReservationInput
  - `fileName` string, required
  - `contentType` string, required
  - `sizeBytes` integer, required
  - `type` 'image' | 'video' | 'document'
  - `purpose` 'youtube_thumbnail': Omit for ordinary media. Auxiliary thumbnails require JPEG/PNG, type image, at most 2097152 bytes and at least 640x360 actual pixels.

## Response `201`

Successful Company response.

- CompanyCommandResponse
  - `success` true, required
  - `data` object, required: Company command data with accountId/workspaceId and fields appropriate to the command.

## Other responses

- `401`: API key authentication failed; existing API authentication error envelope.
- `402`: Company billing access is required (COMPANY_BILLING_REQUIRED).
- `403`: Workspace or role unavailable (AGENCY_CORE_ACCESS_DENIED).
- `409`: Content/media state or idempotency conflict; refetch before a changed request.
- `422`: Invalid upload contract or verified media metadata (AGENCY_CORE_MEDIA_TYPE_MISMATCH), or file size above the limit (AGENCY_CORE_MEDIA_SIZE_EXCEEDED).
- `429`: Workspace upload budget or pending-upload limit reached (AGENCY_CORE_MEDIA_WORKSPACE_QUOTA_EXCEEDED). Respect Retry-After.
- `503`: Company service or dependency unavailable.

## Changes

- **2026-10-22** `83bd5829401f`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/publora/apis/publora-api/changes/company/post-groups/:postGroupId/media/reservations/post.md)

---

[API](https://skmtc.dev/publora/apis/publora-api.md) - [All operations](https://skmtc.dev/publora/apis/publora-api/llms.txt) - [OpenAPI document](https://skmtc.dev/publora/apis/publora-api/revisions/f93f96e52798?raw)