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Seedream 4 image generation and editing

seedream-4

ByteDance's Seedream 4: text-to-image and precise edits from up to 10 reference images, at up to 4K, for one flat price. Compared with other image tools: budget. Price: $0.042 per image, charged only on success. One call = one image.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "prompt": "<prompt>"
    },
    "name": "seedream-4"
  }
}

Input Schema

Name	Required	Description
`size`	No	Same price. Default 2K
`prompt`	Yes	What to create or change
`image_input`	No	Reference or source image URLs (https), optional
`aspect_ratio`	No	Aspect ratio, default match_input_image

Schema Changelog

Changes observed during successful MCP inspections.

First observedNov 15, 2026

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