MCP Image Generator

MCP server for AI image generation. Works with Claude Code, Cursor, Claude Desktop, OpenCode, Charm (Crush/Mods), and any MCP-compatible AI agent.

Providers supported (image models only):

• OpenRouter (default) — Gemini Flash Image, FLUX 2, Sourceful Riverflow, GPT-5 Image
• Together AI — FLUX.1 Schnell/Dev/Pro, Stable Diffusion XL
• Replicate — FLUX Schnell, FLUX 1.1 Pro, SDXL, Ideogram
• fal.ai — FLUX Dev/Schnell/2 Pro, Recraft V3

Quick Start

No install needed — just use npx:

OPENROUTER_API_KEY="sk-or-v1-..." npx -y mcpimg

Tools

generate_image

Generate an image from a text prompt.

Parameter	Type	Description
prompt	string (required)	Text description of the image
model	string	Model ID (e.g. google/gemini-2.5-flash-image)
provider	string	openrouter (default), together, replicate, fal
aspect_ratio	string	1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3
image_size	string	1K (default), 2K, 4K
negative_prompt	string	What to exclude (not all providers support this)
seed	number	Random seed for reproducibility
save_to	string	Custom file path to save the image

list_providers

List all configured providers and their available image models.

Parameter	Type	Description
provider	string	Filter by provider name

---

Setup for AI Agents / IDEs

Claude Code

claude mcp add --scope user --transport stdio image-gen \
  --env OPENROUTER_API_KEY=sk-or-v1-xxx \
  -- npx -y mcpimg

Or create .mcp.json in your project root:

{
  "mcpServers": {
    "image-gen": {
      "command": "npx",
      "args": ["-y", "mcpimg"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-..."
      }
    }
  }
}

Cursor

Edit ~/.cursor/mcp.json:

{
  "mcpServers": {
    "image-gen": {
      "command": "npx",
      "args": ["-y", "mcpimg"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-..."
      }
    }
  }
}

Claude Desktop

Edit the config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "image-gen": {
      "command": "npx",
      "args": ["-y", "mcpimg"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-..."
      }
    }
  }
}

OpenCode (by SST)

Edit ~/.config/opencode/opencode.json or opencode.json in project root:

{
  "mcp": {
    "image-gen": {
      "type": "local",
      "command": ["npx", "-y", "mcpimg"],
      "environment": {
        "OPENROUTER_API_KEY": "sk-or-v1-..."
      },
      "enabled": true,
      "timeout": 120000
    }
  }
}

Charm Crush

Add to crush.json in your project root:

{
  "mcp": {
    "image-gen": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "mcpimg"],
      "env": {
        "OPENROUTER_API_KEY": "sk-or-v1-..."
      }
    }
  }
}

Charm Mods

Edit mods.yml (mods --settings):

mcp-servers:
  image-gen:
    command: [npx]
    args:
      - -y
      - mcpimg
    env:
      - OPENROUTER_API_KEY=sk-or-v1-...

Any MCP-compatible agent

This server uses stdio transport (JSON-RPC over stdin/stdout). Any agent that supports MCP stdio can use it:

npx -y mcpimg

# Required environment variables (at least one)
OPENROUTER_API_KEY=...    # OpenRouter (default)
TOGETHER_API_KEY=...      # Together AI
REPLICATE_API_TOKEN=...   # Replicate
FAL_KEY=...               # fal.ai

Using Multiple Providers

Set multiple API keys to use different providers:

export OPENROUTER_API_KEY="sk-or-v1-..."
export TOGETHER_API_KEY="..."
export FAL_KEY="..."

Then specify the provider when generating:

generate_image(prompt="a cat", provider="together", model="black-forest-labs/FLUX.1-schnell")

Environment Variables

Variable	Provider	Required
OPENROUTER_API_KEY	OpenRouter	At least one
TOGETHER_API_KEY	Together AI	provider key
REPLICATE_API_TOKEN	Replicate	is required
FAL_KEY	fal.ai
IMAGE_OUTPUT_DIR	—	Optional. Default: ~/generated-images/

License

MIT