Beat Cut API

The studio wall and the looks cut on the beat: wide, close, wide again, one look then the next, faster and faster, the way a campaign teaser runs. Two to four cut-out photos or clips (transparent background).

Get an API key Claude MCP

POST/v1/generateworkflow: motion_beat_cut-v1

One endpoint serves every workflow — this page documents motion_beat_cut-v1, the current version. Credits are debited at submission (1 cr/s standard, 1 cr/s pro); a failed generation is refunded automatically. Earlier versions of this endpoint, if any, keep being served under their own names.

Parameter	Value for this workflow
workflow	"motion_beat_cut-v1" required
slot_1	Look 1 — one public HTTPS URL.required
slot_2	Look 2 — one public HTTPS URL.required
slot_3	Look 3 — one public HTTPS URL.
slot_4	Look 4 — one public HTTPS URL.
fields.word	Last word (optional).
fields.background	Background. Defaults to “#E7E2DB”.
duration	10 (seconds)
tier	"standard" (1 cr/s), "pro" (1 cr/s)
webhook_url	Optional — we POST the outcome here when the generation settles. Without it, poll the URL returned in the response until the status settles.

Example request

curl -X POST https://thenewblack.ai/api/v1/generate \
  -H "Authorization: Bearer tnb_live_XXXXXXXXXXXX" \
  -H "Content-Type: application/json" \
  -d '{
    "workflow": "motion_beat_cut-v1",
    "slot_1": "https://example.com/image.jpg",
    "slot_2": "https://example.com/image.jpg",
    "slot_3": "https://example.com/image.jpg",
    "slot_4": "https://example.com/image.jpg",
    "fields": {
      "word": "",
      "background": "#E7E2DB"
    },
    "duration": "10",
    "tier": "standard"
  }'

// 202 Accepted
{
  "generation_id": "3f1c9a6e-...",
  "status": "running",
  "poll": "/api/v1/generations/3f1c9a6e-..."
}

Example response

Poll /v1/generations/{id} (or receive the webhook) until the generation settles:

// 200 OK
{
  "generation_id": "3f1c9a6e-...",
  "workflow": "motion_beat_cut",
  "status": "succeeded",
  "result": {
    "type": "video",
    "url": "https://.../result.mp4",
    "thumbnail": "https://.../thumb.webp"
  }
}

Results are stored for 48 hours — copy them to your own storage. Authentication, errors and webhooks are documented in the full API reference.

Frequently asked questions

What does the Beat Cut endpoint need?

slot_1 (Look 1), slot_2 (Look 2), slot_3 (Look 3, optional), slot_4 (Look 4, optional), fields.word (Last word (optional), optional), fields.background (Background, optional) — all as listed in the parameter table above, and in GET /v1/catalog.

How is it billed?

Per second of output, at the standard, pro or ultra rate shown above; a failed generation is refunded.

How much does it cost?

1 credit per second on the standard tier, 1 per second on pro. Credits come with plans and packs; a failed generation is always refunded.

Other endpoints: Virtual Try-On API · AI Fashion Models API · Fashion Design API · Reimagine Model API · Swap Model API · AI Stylist API · all endpoints