Midjourney /blend Command

October 27, 2025

Table of contents

  1. Request Headers
  2. Request Body
  3. Parameters
  4. Responses
  5. Model
  6. Examples
  7. Try It

Blend 2-5 images together using Midjourney’s /blend command.

https://api.useapi.net/v3/midjourney/jobs/blend

Request Headers 
Authorization: Bearer {API token}
Content-Type: application/json
# Alternatively you can use multipart/form-data (required for Blob content uploads).
# Content-Type: multipart/form-data
Request Body 
{
  "imageUrl_1": "https://example.com/image1.jpg",
  "imageUrl_2": "https://example.com/image2.jpg",
  "imageUrl_3": "https://example.com/image3.jpg",
  "blendDimensions": "Square",
  "stream": true
}
Parameters

  • channel is optional. Discord channel ID to use. See GET /accounts for configured channels. If not provided, API automatically selects available channel with capacity. Specify when you want to use a specific configured channel.

  • imageUrl_1 and imageUrl_2 OR imageBlob_1 and imageBlob_2 are required. Minimum 2 images, maximum 5 images. Can mix URLs and blobs (e.g., imageUrl_1 + imageBlob_2). Cannot specify both URL and blob for same number (e.g., both imageUrl_1 and imageBlob_1).

  • imageUrl_3, imageUrl_4, imageUrl_5 are optional.

  • imageBlob_3, imageBlob_4, imageBlob_5 are optional.

  • blendDimensions is optional. One of: Portrait, Square, Landscape. Default: Square.

  • stream is optional (default: true).
    • true - Returns Content-Type: text/event-stream with live progress events. See SSE Streaming Guide
    • false - Returns Content-Type: application/json with initial job state. Use GET /jobs/jobid to retrieve updates and results

  • replyUrl is optional. Webhook URL for real-time job event callbacks. If channel has default replyUrl configured, it will be used when job-specific one is not provided. All job events POST-ed to this URL as they occur.
    Overrides channel-level replyUrl if specified.
    Maximum length 1024 characters.

  • replyRef is optional. Your reference ID stored with job.
    Returned in all responses and callbacks as response.replyRef.
    Maximum length 1024 characters.
Responses

  • 200 OK

    Use returned jobid to retrieve job status and results. content contains message generated by Midjourney reflecting current generation parameters and progress.

    If you want to retrieve four separate upscaled images once job completed successfully execute seed.

    {
    "jobid": "<jobid>",
    "verb": "blend",
    "status": "started",
    "created": "2023-10-06T18:36:37.963Z",
    "updated": "2023-10-06T18:36:50.401Z",
    "blendUrls": [
        "https://...1.png",
        "https://...2.jpg"
    ],
    "blendDimensions": "Landscape",
    "discord": "<ABC…secured…xyz>",
    "channel": "<Discord channel id>",
    "maxJobs": 3,
    "replyUrl": "https://webhook.site/abc",
    "replyRef": "<your optional reference id>",
    "messageId": "<Discord message id>",
    "content": "**<https://...1> <https://...2> --s 750 --v 5.2** - <@Discord user id> (Waiting to start)",
    "timestamp": "2023-10-06T18:36:48.875000+00:00",
    "code": 200
}

  • 400 Bad Request

    {
  "error": "At least 2 images are required for blend"
}

  • 401 Unauthorized

    {
  "error": "Unauthorized"
}

  • 402 Payment Required

    {
  "error": "Account has no subscription or subscription expired"
}

  • 422 Unprocessable Content

    Moderated image link, see Midjourney moderation system.

    {
    "error": "Invalid link",
    "errorDetails": "Request cancelled due to image filters.",
    "jobid": "<jobid>",
    "status": "moderated",
    "code": 422
}

  • 429 Too Many Requests

    Channel at capacity or rate limited. Wait 10-30 seconds and retry.

    {
  "error": "Channel 1234567890123456789 is busy executing 3 image jobs"
}

  • 502 Bad Gateway

    Response code 502 means the Midjourney Discord bot did not reply within the allotted time limit. This usually happens when the Discord Gateway API or the Midjourney Discord bot is having issues.
    You can check Discord status and Midjourney Discord server status channel.
    Keep in mind that both links above most often will not reflect an event that has just started.

  • 504 Job queued

    Job queued. The API will not be able to track the progress of this job, although it will still be processed by Midjourney. You may want to adjust the maxJobs number to a lower value for the next several minutes.

    You should not receive this error under normal circumstances unless you have specified a maxJobs parameter higher than your Midjourney subscription supports, or if you are using the Midjourney bot outside of API interactions. On occasions when Midjourney is releasing new updates or experiencing technical issues, jobs may be paused for an extended period of time. Our API will mark all jobs running over 30 minutes as failed. When Midjourney comes back online, it will attempt to complete previously paused jobs, and you may encounter a conflict if you try to submit a new job at the same time. Although this happens very rarely, we have decided to add an extra layer to ensure such cases are detected.

    {
    "error": "Job queued",
    "jobid": "<jobid>",
    "status": "failed",
    "code": 504
}

  • 596 Pending Moderation

    Channel has pending moderation/CAPTCHA. Email notification sent. Log into Discord and address moderation message/CAPTCHA. Execute POST /accounts/channel/reset.

    {
  "error": "All configured Midjourney channels (2) have errors (pending moderation, CAPTCHA, etc.). Please resolve channel issues before making new requests."
}

  • Real-time SSE streaming (stream: true)

    Returns Content-Type: text/event-stream with live events. See SSE Event Format for details.

  • 201 Created

    Job created successfully.

    {
  "jobid": "j1023...",
  "verb": "blend",
  "jobType": "image",
  "status": "created",
  "request": {
    "imageUrl_1": "https://example.com/image1.jpg",
    "imageUrl_2": "https://example.com/image2.jpg",
    "blendDimensions": "Square",
    "stream": false
  }
}
Model

See Job Response Model for complete response structure.

Examples 
  • # With URLs
curl -H "Authorization: Bearer YOUR_API_TOKEN" \
     -H "Content-Type: application/json" \
     -X POST "https://api.useapi.net/v3/midjourney/jobs/blend" \
     -d '{"imageUrl_1":"https://example.com/1.jpg","imageUrl_2":"https://example.com/2.jpg","stream":true}'

# With file uploads
curl -H "Authorization: Bearer YOUR_API_TOKEN" \
     -F "[email protected]" \
     -F "[email protected]" \
     -F "blendDimensions=Square" \
     -F "stream=true" \
     "https://api.useapi.net/v3/midjourney/jobs/blend"

  • // With file uploads
const formData = new FormData();
formData.append('imageBlob_1', file1);
formData.append('imageBlob_2', file2);
formData.append('blendDimensions', 'Square');
formData.append('stream', 'true');

const response = await fetch('https://api.useapi.net/v3/midjourney/jobs/blend', {
  method: 'POST',
  headers: {'Authorization': 'Bearer YOUR_API_TOKEN'},
  body: formData
});

  • import requests

# With file uploads
files = {
    'imageBlob_1': open('image1.jpg', 'rb'),
    'imageBlob_2': open('image2.jpg', 'rb')
}
data = {'blendDimensions': 'Square', 'stream': 'true'}

response = requests.post(
    'https://api.useapi.net/v3/midjourney/jobs/blend',
    headers={'Authorization': 'Bearer YOUR_API_TOKEN'},
    files=files,
    data=data
)
Try It