Meshy Resize API Documentation

Meshy Resize API Documentation

Playground

Meshy Resize scales a 3D model to a real-world height or size and sets its origin. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

Meshy Resize adjusts the real-world scale and origin of an existing 3D model. Set a target height, resize by the longest side, or let the model estimate an appropriate real-world size automatically.

Why Choose This?

• Real-world sizing — Resize a model using dimensions measured in meters.
• Flexible sizing methods — Set the total height, longest side, or use automatic size estimation.
• Proportional scaling — Resize the model while preserving its proportions.
• Origin control — Place the model origin at the bottom or center.
• Multiple 3D formats — Supports common formats including GLB, GLTF, FBX, OBJ, and STL.

Parameters

Use exactly one of resize_height, resize_longest_side, or auto_size=true.

How to Use

1. Upload a model — Provide the source 3D file.
2. Choose a sizing method — Set resize_height, set resize_longest_side, or enable auto_size.
3. Choose the origin — Select bottom or center.
4. Submit — Resize and retrieve the processed model.

Pricing

$0.04 per model.

Sizing method and origin placement do not add separate charges.

Best Use Cases

• 3D printing — Scale models to a specific real-world size before slicing.
• Product visualization — Match digital assets to approximate physical dimensions.
• Game and scene assets — Normalize model scale before importing into a scene.
• Asset preparation — Standardize model dimensions across different sources.
• Origin adjustment — Move the origin to the bottom or center for easier placement.

Pro Tips

• Use resize_height when the model’s overall height is the important dimension.
• Use resize_longest_side when the largest dimension should match a specific size.
• Use auto_size when you want an estimated real-world scale without specifying a dimension manually.
• Use origin_at=bottom when the model should sit naturally on a ground plane.
• Use origin_at=center when centered positioning is more useful for downstream editing or placement.

Notes

• Exactly one sizing method must be used: resize_height, resize_longest_side, or auto_size=true.
• Explicit dimensions are measured in meters and must be greater than 0.
• Model proportions are preserved during resizing.
• auto_size estimates an appropriate real-world height and resizes the model to that scale.
• origin_at supports bottom and center and defaults to bottom.
• GLB, OBJ, FBX, and STL inputs keep their format in the resized result.
• GLTF inputs are returned as GLB.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "model": "example",
  "auto_size": false,
  "origin_at": "bottom"
}
JSON
)

# 1. Submit the prediction once. Never retry this request automatically:
# a retry after an unclear failure can create a second, billed task.
CHECK='The task may already exist. Check History or the predictions list before submitting again.'
if ! SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  --connect-timeout 10 --max-time 60 \
  -X POST "https://api.wavespeed.ai/api/v3/meshy/resize" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}"); then
  printf 'Submit failed. %s\n' "${CHECK}" >&2
  exit 1
fi

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id. %s\n' "${CHECK}" >&2
  exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"

# 2. Poll until the prediction reaches a final status.
BODY_FILE=$(mktemp)
trap 'rm -f "${BODY_FILE}"' EXIT
while true; do
  # Transient errors (429, 5xx) are retried, honoring Retry-After.
  HTTP_CODE=$(curl --silent --show-error --fail-with-body \
    --connect-timeout 10 --max-time 60 --retry 5 --retry-delay 2 \
    --output "${BODY_FILE}" --write-out '%{http_code}' \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}" || true)
  case "${HTTP_CODE}" in
    2??) ;;
    000|429|5??)  # dropped connection or temporary error: keep polling
      printf 'Task %s: HTTP %s, polling again in 10s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      sleep 10; continue ;;
    *) printf 'Task %s: HTTP %s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      cat "${BODY_FILE}" >&2; exit 1 ;;
  esac
  RESULT=$(jq 'if type == "object" and has("data") then .data else . end' "${BODY_FILE}")
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout|deleted)
      printf 'Task %s ended with status %s\n' "${PREDICTION_ID}" "${STATUS}" >&2
      printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    *) sleep 2 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Every model also accepts the global request options enable_sync_mode and enable_base64_output; see their pages for details.

Response Parameters

Result Request Parameters

Result Response Parameters