Change Fabric API

Swap the fabric of a garment in a photo for another fabric — send both images, keep the cut.

POST/v1/generateworkflow: swap_fabrics-v1

One endpoint serves every workflow — this page documents swap_fabrics-v1, the current version. Credits are debited at submission (1 cr standard, 3 cr 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	"swap_fabrics-v1" required
design_image	Your design — one public HTTPS URL.required
fabric_image	New fabric — one public HTTPS URL.required
fields.garmenttoswapfabricon	Garment to swap fabric on. Which garment receives the new fabric, e.g. "the cropped jacket".
ratio	auto
tier	"standard" (1 cr) or "pro" (3 cr)
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": "swap_fabrics-v1",
    "design_image": "https://example.com/design.jpg",
    "fabric_image": "https://example.com/fabric.jpg",
    "fields": {
      "garmenttoswapfabricon": "the cropped jacket"
    },
    "ratio": "auto",
    "tier": "standard"
  }'

Example response

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

// 200 OK
{
  "generation_id": "3f1c9a6e-...",
  "workflow": "swap_fabrics",
  "status": "succeeded",
  "result": {
    "type": "image",
    "url": "https://.../result.webp",
    "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 change-fabric endpoint need?

Two image URLs: the garment photo and the new fabric swatch. The cut and drape stay; the material changes.

How much does it cost?

1 credit on the standard tier, 3 on pro. Credits come with plans and packs; a failed generation is always refunded.

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