550W DEVELOPER PLATFORM

API dành cho nhà phát triển

API xử lý hình ảnh và video

Sign in to generate an API key

Bắt đầu nhanh

Authenticate every request with your userNo and apiKey. Uploading a video is optional: you may either call /open/uploadVideo first or submit a publicly reachable videoUrl directly.

curl -X POST https://www.550wai.cn/open/submitTask \
  -F userNo=YOUR_USER_NO -F apiKey=YOUR_API_KEY \
  -F videoUrl=https://example.com/video.mp4 \
  -F width=1920 -F height=1080 -F duration=30 \
  -F x1=0 -F y1=0 -F x2=1920 -F y2=200

Các endpoint khả dụng

POST/open/uploadVideo

Optional multipart upload; returns a videoUrl.

POST/open/submitTask

Submit a video subtitle/text erasing task using videoUrl or an uploaded file.

POST/open/taskDetail

Get one video task status and result.

POST/open/taskList

List video tasks for the authenticated user.

POST/open/removeImageWatermark

Submit an image watermark removal task.

POST/open/imageWatermarkTaskDetail

Get an image task status and result.

POST/open/queryCredits

Read the current credit balance.

POST/open/uploadVideo

Upload video

Request format: multipart/form-data

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
filefileYesMP4/MOV video, max 1 GB; max edge 1920 px, min edge 1080 px, duration ≤ 600 s, 8-bit SDR

Response: Returns code, message, videoUrl, coverUrl, width, height and duration.

POST/open/submitTask

Submit subtitle removal task

Request format: application/x-www-form-urlencoded

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
videoUrlstringYesPublic http(s) URL (≤2048 chars)
width / heightnumberYesVideo dimensions; max edge ≤1920 and min edge ≤1080
durationnumberYesSeconds, 1–600
x1,y1,x2,y2numberYesSubtitle rectangle; 0,0,0,0 means full-screen
modestringNonormal (default) or protect
fileNamestringNoOriginal file name
coverUrlstringNoPublic cover URL
callbackUrlstringNoPublic webhook URL called at final state
removeAudiobooleanNoRemove audio before processing (default false)
Idempotency-Key / idempotencyKeystringRecommendedRetry-safe key, max 128 chars

Response: Returns code, message, taskId and status=waiting. Reusing an identical idempotency key returns the original task.

POST/open/taskDetail

Get video task detail

Request format: form or query parameters

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
taskIdstringYesTask identifier, 1–64 chars

Response: Returns task metadata, status, cost, resultUrl on success, failCode/failReason on failure and refundStatus.

POST/open/taskList

List video tasks

Request format: form or query parameters

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
pagenumberNoZero-based page, default 0
sizenumberNoPage size 1–100, default 20

Response: Returns total, page, size and list[]; each item includes taskId, status, fileName, coverUrl, dimensions, duration, cost, timestamps, resultUrl, failCode, failReason and refundStatus.

POST/open/removeImageWatermark

Remove image watermark

Request format: multipart/form-data

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
filefileYesJPG, PNG, BMP, WebP, AVIF, TIFF or SVG; max 50 MB
syncbooleanNoWait for result (default true); false returns processing
operationIdstringNoCaller-defined tracking identifier

Response: Returns code, message, errorCode, creditsAfter and task object (taskId, status, cost, resultUrl, failCode, failReason, createTime, expiredTime).

POST/open/imageWatermarkTaskDetail

Get image task detail

Request format: form or query parameters

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key
taskIdstringYesImage task identifier

Response: Returns task status, resultUrl, failCode, failReason, cost and expiration metadata.

POST/open/queryCredits

Query credits

Request format: form or query parameters

FieldTypeRequiredDescription
userNostringYesAuthenticated user number
apiKeystringYesAPI key

Response: Returns code, message, userNo and non-negative integer credits.

Common request fields

FieldRequiredDescription
userNoYesYour 550W user number.
apiKeyYesAPI key generated from this page.
Idempotency-KeyRecommendedRetry-safe key for task submission; max 128 characters.
callbackUrlNoPublic HTTPS webhook called when a task reaches a final state.

Video submit fields

FieldTypeNotes
videoUrlstringPublic http(s) URL; omit when using an uploaded video.
width / heightnumberPixels; maximum edge ≤ 1920 and minimum edge ≤ 1080.
durationnumberSeconds, 1–600.
x1, y1, x2, y2numberSubtitle rectangle; use 0,0,0,0 for full-screen mode.
modestringnormal (default) or protect.
removeAudiobooleanRemove audio before processing.

Response and task status

Every response is a flat JSON object with code and message. Video tasks move through waiting → processing → success or failed. A successful task returns resultUrl; failed tasks include a stable failCode. Results expire according to the platform retention policy.

{ "code": 200, "message": "success", "taskId": "...", "status": "waiting" }

Mã lỗi

CodeMeaningTypical causes
200SuccessRequest accepted or completed.
-100Authentication or quota failureMissing/mismatched userNo or apiKey, or insufficient credits.
-200Invalid parameterMissing fields, invalid URL, dimensions, duration, or idempotency key.
-300Business rejectionTask not found, unavailable, or unable to be accepted.
-400Account suspendedAccount blocked for policy violations.
-500Internal errorRetry later.
-600Unsupported video formatCodec, bit depth, HDR, or audio format is unsupported.

JavaScript và Python

// JavaScript
const form = new FormData();
form.append('userNo', USER_NO);
form.append('apiKey', API_KEY);
form.append('videoUrl', VIDEO_URL);
const response = await fetch('https://www.550wai.cn/open/submitTask', { method: 'POST', body: form });

# Python
import requests
r = requests.post('https://www.550wai.cn/open/submitTask', data={
  'userNo': USER_NO, 'apiKey': API_KEY, 'videoUrl': VIDEO_URL,
  'width': 1920, 'height': 1080, 'duration': 30,
  'x1': 0, 'y1': 0, 'x2': 1920, 'y2': 200
})

Sử dụng và thanh toán

Video subtitle removal uses the same credit schedule as the domestic Open API. Images are charged 10 credits per task. Failed processing is not charged; when a post-charge media failure occurs, inspect refundStatus.

Video resolutionRateExample
width × height ≤ 921,600 (720p or below)1.3 credits / second1280×720 for 30s ≈ 39 credits
width × height > 921,600 (up to 1080p)1.6 credits / second1920×1080 for 30s ≈ 48 credits

Task detail and list responses are scoped to the authenticated user. Video-link watermark removal is not available through the Eraser developer API.

See code, message, status, failCode and refundStatus for robust error handling.