The MCP server is open source (MIT) and free to run, but it calls Stability AI's API against your STABILITY_AI_API_KEY, which is credit-based and paid (Stability provides a small number of free credits to start). You pay per generation or edit.

Does it support remote/OAuth?

No. It runs locally over stdio via npx and authenticates with a STABILITY_AI_API_KEY. It also requires IMAGE_STORAGE_DIRECTORY so generated images are written to disk.

Is this an official Stability AI server?

No. It is an independent, community-maintained server and is not officially affiliated with Stability AI, though it targets Stability's official image API.

Stability AI MCP server

CommunityTadas Antanavicius83Config last verified Jun 1, 2026

Community MCP server for Stability AI: generate, edit, upscale, outpaint, and restyle images with Stable Diffusion from your agent.

mcp-server-stability-ai is a well-maintained community MCP server that puts Stability AI's image generation and editing API behind an agent's tool calls. It is not officially affiliated with Stability AI, but it covers the platform's core creative surface: generate images from a prompt (including the Stable Diffusion 3.5 models), remove backgrounds, outpaint to extend a canvas, search-and-replace objects by description, upscale fast (4x) or creatively (up to 4K), recolor objects, and relight a replaced background.

It also exposes Stability's structural and stylistic controls — control-sketch turns a rough drawing into a finished image, control-style transfers the look of a reference, and control-structure preserves a reference's composition — so an agent can do real production image work, not just one-shot generation. The server runs locally over stdio via npx (mcp-server-stability-ai) and authenticates with a STABILITY_AI_API_KEY; you also set IMAGE_STORAGE_DIRECTORY so generated images are written somewhere the agent and you can find them. It is MIT-licensed, published on npm, and a common pick for design-to-image agent workflows.

Quick install

Copy-paste configs are provided for all 8 supported clients. Pick your client below.

Add to ~/.claude.json

~/.claude.json

json

{
  "mcpServers": {
    "stability": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-server-stability-ai"
      ],
      "env": {
        "STABILITY_AI_API_KEY": "<STABILITY_AI_API_KEY>",
        "IMAGE_STORAGE_DIRECTORY": "<IMAGE_STORAGE_DIRECTORY>"
      }
    }
  }
}

Or via CLI

bash

claude mcp add stability -- npx -y mcp-server-stability-ai

Step-by-step guides

Available tools

Tool	Description
generate-image	Generate a high quality image of anything based on a provided prompt and other optional parameters.
generate-image-sd35	Generate an image using Stable Diffusion 3.5 models with advanced configuration options.
remove-background	Remove the background from an image.
outpaint	Extend an image in any direction while maintaining visual consistency.
search-and-replace	Replace objects or elements in an image by describing what to replace and what to replace it with.
upscale-fast	Enhance image resolution by 4x.
upscale-creative	Enhance image resolution up to 4K.
control-sketch	Translate a hand-drawn sketch into a production-grade image.
control-style	Generate an image in the style of a reference image.
control-structure	Generate an image while maintaining the structure of a reference image.
replace-background-and-relight	Replace the background of an image and relight it.
search-and-recolor	Search for and recolor objects in an image.

Required configuration

STABILITY_AI_API_KEYRequired
Stability AI API key from platform.stability.ai/account/keys. Required.
IMAGE_STORAGE_DIRECTORYRequired
Filesystem path where generated and edited images are saved. Required.

What you can do with it

Edit an image without leaving the agent

Hand the agent an image and ask it to remove the background, replace an object, and upscale to 4K — it chains remove-background, search-and-replace, and upscale-creative, saving each result to your image directory.

Turn a sketch into a finished asset

Give the agent a rough drawing and a style reference, and it calls control-sketch and control-style to produce a polished, on-brand image ready to drop into a design.

FAQ

Is it free?: The MCP server is open source (MIT) and free to run, but it calls Stability AI's API against your STABILITY_AI_API_KEY, which is credit-based and paid (Stability provides a small number of free credits to start). You pay per generation or edit.
Does it support remote/OAuth?: No. It runs locally over stdio via npx and authenticates with a STABILITY_AI_API_KEY. It also requires IMAGE_STORAGE_DIRECTORY so generated images are written to disk.
Is this an official Stability AI server?: No. It is an independent, community-maintained server and is not officially affiliated with Stability AI, though it targets Stability's official image API.

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