MiniMax H3 API reference

Call MiniMax H3 from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in credits, and a request you can paste into a terminal.

At a glance

Made by: MiniMax
Output: Video
From: 5.55 credits per second of output ($0.0555)
Typical time: about 33 s
Model IDs: minimax/h3/text-to-video
minimax/h3/image-to-video
minimax/h3/reference-to-video
minimax/h3/video-extend

1 credit = $0.01. A task holds the highest possible charge when it is accepted and settles the real amount when it finishes, rounded up to whole credits; failed tasks are not charged. Ask POST /api/v1/jobs/quote for the exact figure before you run.

Create Video

minimax/h3/text-to-video

Price

Option	Credits (per second of output)	US dollars
`768p`	5.55	$0.0555
`2k`	8.7	$0.087

Parameters

Field	Type	Default	Allowed	What it does
`prompt`Required	`string`	—	up to 7,000 characters	Describe the picture, the action, the camera, the sound, and the boundaries for the shot.
`aspect_ratio`Optional	`string`	`16:9`	16:9, 9:16, 1:1, 4:3, 3:4, 21:9	Output aspect ratio.
`resolution`Optional	`string`	`768p`	768p, 2k	Output resolution.
`duration_seconds`Optional	`integer`	`5`	5 to 15	Requested output length in seconds.
`enable_prompt_expansion`Optional	`boolean`	`false`	false	Accepted for compatibility only. This endpoint does not expand prompts, so the only allowed value is false.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

POST /api/v1/jobs/createTask?wait=60

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "minimax/h3/text-to-video",
  "input": {
    "prompt": "A paper boat drifts down a rain-soaked street at dusk, neon signs reflecting in the water, slow tracking shot at ground level",
    "duration_seconds": 5,
    "resolution": "768p"
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Image to Video

minimax/h3/image-to-video

Price

Option	Credits (per second of output)	US dollars
`768p`	5.55	$0.0555
`2k`	8.7	$0.087

Parameters

Field	Type	Default	Allowed	What it does
`prompt`Required	`string`	—	up to 7,000 characters	Describe what happens after the opening frame: the action, the camera, and the sound.
`image_url`Required	`string (uri)`	—	—	Authorised opening frame.
`last_image_url`Optional	`string (uri)`	—	—	Optional closing frame the clip should resolve to.
`resolution`Optional	`string`	`768p`	768p, 2k	Output resolution.
`duration_seconds`Optional	`integer`	`5`	4 to 15	Requested output length in seconds.
`enable_prompt_expansion`Optional	`boolean`	`false`	false	Accepted for compatibility only. This endpoint does not expand prompts, so the only allowed value is false.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

The example uses PopNow sample files in image_url. Replace them with your own public HTTPS links, uploads or saved assets.

POST /api/v1/jobs/createTask

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "minimax/h3/image-to-video",
  "input": {
    "prompt": "He lands softly on the rooftop, laughs and turns toward the camera while the balloons sway in the evening breeze; slow push-in",
    "image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
    "duration_seconds": 5,
    "resolution": "768p"
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Reference to Video

minimax/h3/reference-to-video

Price

Option	Credits (per second of output)	US dollars
`768p`	5.55	$0.0555
`2k`	8.7	$0.087

Parameters

Field	Type	Default	Allowed	What it does
`prompt`Required	`string`	—	up to 7,000 characters	Refer to the references by number and describe the shot they should produce.
`reference_image_urls`Required	`array<string (uri)>`	—	up to 9 items	Authorised image references, up to nine.
`reference_video_urls`Optional	`array<string (uri)>`	—	up to 3 items	Up to three reference videos, 2 to 15 seconds each and 15 seconds in total. Refer to them in the prompt as <Video 1> and so on. Their seconds have their own per-second rate, lower than output seconds.
`reference_audio_urls`Optional	`array<string (uri)>`	—	up to 3 items	Up to three reference audio clips (WAV or MP3), 2 to 15 seconds each and 15 seconds in total, for a voice or a sound.
`aspect_ratio`Optional	`string`	`16:9`	16:9, 9:16, 1:1, 4:3, 3:4, 21:9	Output aspect ratio.
`resolution`Optional	`string`	`768p`	768p, 2k	Output resolution.
`duration_seconds`Optional	`integer`	`5`	4 to 15	Requested output length in seconds.
`enable_prompt_expansion`Optional	`boolean`	`false`	false	Accepted for compatibility only. This endpoint does not expand prompts, so the only allowed value is false.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

The example uses PopNow sample files in reference_image_urls. Replace them with your own public HTTPS links, uploads or saved assets.

POST /api/v1/jobs/createTask

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "minimax/h3/reference-to-video",
  "input": {
    "prompt": "The man from the reference image jogs across a sunlit rooftop at golden hour and smiles at the camera; smooth tracking shot",
    "reference_image_urls": [
      "https://media.popnow.ai/influencer/examples/ava.webp"
    ],
    "duration_seconds": 5,
    "resolution": "768p"
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Extend Video

minimax/h3/video-extend

Price

Option	Credits (per second of output)	US dollars
`768p`	5.55	$0.0555
`2k`	8.7	$0.087

Parameters

Field	Type	Default	Allowed	What it does
`prompt`Required	`string`	—	up to 7,000 characters	Describe what happens next: the action that follows, the camera move and the sound.
`video_url`Required	`string (uri)`	—	—	The clip to continue: MP4, MOV or WebM, up to 60 seconds. Its last frame opens the new segment, and the result is your clip with the new segment joined on.
`last_image_url`Optional	`string (uri)`	—	—	Optional target end frame: the new segment closes on this image.
`resolution`Optional	`string`	`768p`	768p, 2k	Resolution of the new segment. It sets how sharp the new part is generated; match your source clip.
`duration_seconds`Optional	`integer`	`5`	4 to 15	Length of the new segment in seconds, from 4 to 15. The source clip is added on top and is not billed.
`enable_prompt_expansion`Optional	`boolean`	`false`	false	Accepted for compatibility only. This endpoint does not expand prompts, so the only allowed value is false.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

The example uses PopNow sample files in video_url. Replace them with your own public HTTPS links, uploads or saved assets.

POST /api/v1/jobs/createTask

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "minimax/h3/video-extend",
  "input": {
    "prompt": "The flowers keep opening while the camera slowly pulls back to reveal a sunlit meadow",
    "video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
    "duration_seconds": 5,
    "resolution": "768p"
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

MiniMax H3 API reference

At a glance

Create Video

Price

Parameters

Example request

Image to Video

Price

Parameters

Example request

Reference to Video

Price

Parameters

Example request

Extend Video

Price

Parameters

Example request

Next steps

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