---
url: /orchestration/reference/operations/AppendStreamingBlob.md
description: 'POST /v2/consumer/streaming-blobs/{blobKey} — POST /v2/consumer/streaming-blobs/{blobKey}'
---

> Documentation index: https://developer.civitai.com/llms.txt — every page on this site has a markdown version at its URL + `.md`.

# POST /v2/consumer/streaming-blobs/{blobKey}

`POST https://orchestration.civitai.com/v2/consumer/streaming-blobs/{blobKey}`

Operation `AppendStreamingBlob` · StreamingBlobs · Civitai Orchestration API, generated from the published OpenAPI spec ([v2-consumers.json](https://developer.civitai.com/openapi/v2-consumers.json)); the interactive HTML page is this URL without `.md`.

Number chunks from `seq=0`; a resent seq is a no-op, a gap returns 409 with the expected seq,
and `final=true` closes the blob.

## Authentication

The spec marks this operation anonymous (`security: []`): no token is needed, although it still documents a `401 Unauthorized` response.

## Parameters

| Name | In | Type | Required | Description |
|---|---|---|---|---|
| `blobKey` | path | string | yes |  |
| `seq` | query | integer (int64) | no |  |
| `final` | query | boolean | no | (default `false`) |

## Responses

### 200 OK

Content type: `application/json`.

Schema `StreamingBlobAppendResponse`.

| Field | Type | Required | Description |
|---|---|---|---|
| `nextSequence` | integer (int64) | yes | The sequence number the blob expects next. |

### 401 Unauthorized

Content type: `application/json`.

Schema `ProblemDetails`.

| Field | Type | Required | Description |
|---|---|---|---|
| `type` | string, nullable | no |  |
| `title` | string, nullable | no |  |
| `status` | integer (int32), nullable | no |  |
| `detail` | string, nullable | no |  |
| `instance` | string, nullable | no |  |

### 403 Forbidden

Content type: `application/json`.

Schema `ProblemDetails` — fields as listed above.

### 409 Conflict

Content type: `application/json`.

Schema `StreamingBlobAppendResponse` — fields as listed above.

### 413 Content Too Large

Content type: `application/json`.

Schema `ProblemDetails` — fields as listed above.