How to Use the MiniMax H3 Singularity Reference-to-Video API: reference to video integration guide (2026)
Learn how to call the MiniMax H3 Singularity Reference-to-Video API on NamiFusion: parameters, pricing (from ≈$0.250) and runnable copy-paste code — try it in the playground first.
MiniMax H3 Singularity Reference-to-Video is a reference to video model by Minimax H3 Singularity: Generate videos with native stereo audio, 3–15 second durations and four resolution tiers. On NamiFusion you can try it in the playground (exact quote shown before you submit), then call it through one unified REST API — about $0.250 per typical run.
TL;DR
· Task type: reference to video, provided by Minimax H3 Singularity
· Pricing: about $0.250 per typical run ($1 = 100 credits), pay-as-you-go
· Getting started: playground (exact quote before submit) → create an API key → one POST request
· Tunable parameters: 7 (see the table below)
· No platform watermark; commercial use allowed (per the Terms of Service)
What can you build with MiniMax H3 Singularity Reference-to-Video?
Short-form video and ad clips: go from a prompt or a single image to publishable motion content.
Product demos and concept previews: validate storyboards and visual direction cheaply before any shoot.
A social content factory: batch vertical clips and ride trending topics fast.
Remixing existing assets: image-to-video brings static work to life and extends its lifespan.
How do you call this API?
- Sign up on NamiFusion and create a key on the API Keys page (signup bonus credits can only be used on selected models).
- Submit a task with the cURL example below, passing your key as a Bearer token.
- Poll the task status with the returned task_uuid and read the output URLs when completed.
# 1) Submit — returns { "task_uuid": "..." }
curl -X POST "https://www.namifusion.com/api/v1/marketplace/run/minimax-h3-singularity/reference-to-video" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"input": {
"prompt": "A cinematic portrait, dramatic rim light, shallow depth of field",
"aspect_ratio": "16:9",
"resolution": "480p",
"duration": 5
}
}'
# 2) Poll until status is "completed", then read the output URLs
curl "https://www.namifusion.com/api/v1/marketplace/run/tasks/TASK_UUID" \
-H "Authorization: Bearer YOUR_API_KEY"What parameters does it take?
prompt (Prompt): required
reference_images (Reference Images): optional
reference_audios (Reference Audios): optional
aspect_ratio (Aspect Ratio): optional, default "16:9"
resolution (Resolution): optional, default "480p"
duration (Duration): optional, default 5
seed (Seed): optional
How do you write prompts for MiniMax H3 Singularity Reference-to-Video?
- Subject first: lead with the actor and action, then add environment, lighting and style ("an astronaut sprinting through a neon street in the rain, cinematic, shallow depth of field").
- Concrete nouns beat stacked adjectives: "85mm portrait lens, golden-hour backlight" works far better than "very beautiful, ultra high quality".
- Change one variable per iteration: pin the seed to reproduce a result, tweak a single phrase at a time so you know what actually moved the output.
- State negatives positively: instead of "no blur", ask for "sharp focus, crisp details".
How much does it cost?
Pay-per-use in credits. About $0.250 per typical run ($1 = 100 credits); the exact price varies with parameters like resolution or duration, and the playground shows the exact quote before you submit.
MiniMax H3 Singularity Reference-to-Video
Create a video with native stereo audio from reference media.
Inputs
| Parameter | Required | Type / limits / default |
|---|---|---|
prompt | Yes | Motion, scene and sound instructions. |
reference_images | No | array; at most 9 image URLs. |
reference_videos | No | array; at most 3 video URLs; combined reference duration capped at 15 seconds; soundtracks are used. |
reference_audios | No | array; at most 3 audio URLs; each audio is trimmed to 15 seconds. |
aspect_ratio | No | string; 16:9 / 9:16 / 1:1 / 4:3 / 3:4 / 21:9 / 9:21; default: 16:9 |
resolution | No | string; 480p / 540p / 768p / 1080p; default: 480p |
duration | No | integer; 3–15; default: 5 |
seed | No | integer; -1 = random |
Provide at least one reference input. Use <Picture 1>, <Video 1> and <Audio 1> tags in the prompt; numbering follows each array.
Listing price
| Resolution | USD / second | Credits / second |
|---|---|---|
| 480p | $0.05 | 5 |
| 540p | $0.075 | 7.5 |
| 768p | $0.1 | 10 |
| 1080p | $0.2 | 20 |
USD list prices before account discounts; 1 USD = 100 credits. Reference videos use the same per-second rate as output video. Add $0.02 (2 credits) per reference image and per standalone audio. Sum all reference-video durations, cap at 15 seconds, then round up to whole seconds.
Charge = rate × (output seconds + ceil(min(total reference-video seconds, 15))) + $0.02 × (image count + standalone audio count).
Nami rounds the final credit amount upward to 0.01 credit. Native generated audio has no separate charge.
API example
Replace the example media URL with your uploaded asset. Submit once, then poll the returned task_uuid; do not automatically retry submission.
POST https://www.namifusion.com/api/v1/marketplace/run/minimax-h3-singularity/reference-to-video
Authorization: Bearer YOUR_NAMIFUSION_API_KEY
Content-Type: application/json
{
"input": {
"prompt": "Animate the subject from <Picture 1> with a slow camera move and ambient sound.",
"duration": 5,
"resolution": "480p",
"reference_images": [
"https://example.com/subject.png"
]
}
}
GET https://www.namifusion.com/api/v1/marketplace/run/tasks/{task_uuid}
Authorization: Bearer YOUR_NAMIFUSION_API_KEY
Successful submission returns task_uuid and status. Query the task until completed or failed; successful output.videos contains the generated video URLs.
FAQ
Can I try it for free first?+
Signup bonus credits can only be used on selected models, and eligibility may change. The playground shows the exact quote before submission.
Can I use the output commercially? Is there a watermark?+
Yes, outputs are yours to use commercially, and NamiFusion adds no platform watermark — subject to the Terms of Service and applicable law.
What is the content policy?+
Pornographic content, sexualized content involving a minor, unauthorized use of real people, deceptive impersonation, fraud and false endorsements are prohibited. Lawful, consensual, non-explicit adult themes may be permitted; see the Terms of Service.
How long does a MiniMax H3 Singularity Reference-to-Video task take?+
It depends on parameters — images usually take seconds, videos tens of seconds to minutes. The API returns a task_uuid for polling.
What are the resolution and duration limits?+
See the parameter table above — each model lists its available resolution and duration options there and in the playground.