Image Generation MCP Server

by pvliesdonkio.github.pvliesdonk/image-generation-mcpv1.12.1

MCP server for AI image generation via OpenAI, Stable Diffusion (SD WebUI), or placeholders.

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Active25d ago

Install Image Generation MCP server

claude mcp add image-generation -e IMAGE_GENERATION_MCP_OPENAI_API_KEY='<image-generation-mcp-openai-api-key>' -e IMAGE_GENERATION_MCP_GOOGLE_API_KEY='<image-generation-mcp-google-api-key>' -- uvx image-generation-mcp

{
  "mcpServers": {
    "image-generation": {
      "command": "uvx",
      "args": [
        "image-generation-mcp"
      ],
      "env": {
        "IMAGE_GENERATION_MCP_OPENAI_API_KEY": "<image-generation-mcp-openai-api-key>",
        "IMAGE_GENERATION_MCP_GOOGLE_API_KEY": "<image-generation-mcp-google-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "image-generation": {
      "command": "uvx",
      "args": [
        "image-generation-mcp"
      ],
      "env": {
        "IMAGE_GENERATION_MCP_OPENAI_API_KEY": "<image-generation-mcp-openai-api-key>",
        "IMAGE_GENERATION_MCP_GOOGLE_API_KEY": "<image-generation-mcp-google-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "image-generation": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "image-generation-mcp"
      ],
      "env": {
        "IMAGE_GENERATION_MCP_OPENAI_API_KEY": "<image-generation-mcp-openai-api-key>",
        "IMAGE_GENERATION_MCP_GOOGLE_API_KEY": "<image-generation-mcp-google-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "image-generation": {
      "command": "uvx",
      "args": [
        "image-generation-mcp"
      ],
      "env": {
        "IMAGE_GENERATION_MCP_OPENAI_API_KEY": "<image-generation-mcp-openai-api-key>",
        "IMAGE_GENERATION_MCP_GOOGLE_API_KEY": "<image-generation-mcp-google-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
IMAGE_GENERATION_MCP_BASE_URL	—	—	Public base URL of the deployed server, e.g. `https://mcp.example.com`. Required for OIDC. Also the fallback source of the MCP Apps domain when `app_domain` is unset.
IMAGE_GENERATION_MCP_BEARER_TOKEN	—	yes	Single shared bearer token; enables bearer auth unless `bearer_tokens_file` is set, which takes precedence.
IMAGE_GENERATION_MCP_OIDC_CONFIG_URL	—	—	OIDC discovery document URL, e.g. `https://auth.example.com/.well-known/openid-configuration`.
IMAGE_GENERATION_MCP_OIDC_CLIENT_ID	—	—	OIDC client identifier registered with the provider.
IMAGE_GENERATION_MCP_OIDC_CLIENT_SECRET	—	yes	OIDC client secret registered with the provider.
IMAGE_GENERATION_MCP_OIDC_AUDIENCE	—	—	Expected `aud` claim; tokens issued for another audience are rejected.
IMAGE_GENERATION_MCP_OIDC_REQUIRED_SCOPES	—	—	Scopes a caller must present, space- or comma-separated. Defaults to `openid` in oidc-proxy mode.
IMAGE_GENERATION_MCP_OIDC_ADVERTISED_SCOPES	—	—	Scopes advertised to MCP clients in protected-resource metadata, space- or comma-separated. Overrides the default `openid offline_access`; `oidc_required_scopes` is always added on top. Set this when the registered client is not permitted `offline_access`, or to have clients request extra claim scopes (e.g. `groups`) without also requiring them in every token.
IMAGE_GENERATION_MCP_OIDC_JWT_SIGNING_KEY	—	yes	Signing key for issued JWTs; used in oidc-proxy mode only. When unset, the key is derived deterministically from `oidc_client_secret`, so tokens survive a restart — but rotating that secret invalidates every issued token. Set this explicitly to decouple token validity from secret rotation. Generate with `openssl rand -hex 32`.
IMAGE_GENERATION_MCP_OIDC_VERIFY_ACCESS_TOKEN	—	—	Validate the access token instead of the id token.
IMAGE_GENERATION_MCP_KV_STORE_URL	—	—	Persistent-state backend URL shared by every pvl-core subsystem that needs state. `memory://` is in-process and lost on restart; `file:///path` persists on one server; `redis://`, `dynamodb://` and `mongodb://` each need their matching extra. When unset, defaults to `file:///data/state` (the volume family Docker images mount), or to `memory://` — with a warning — on a host where that directory is not usable.
IMAGE_GENERATION_MCP_APP_DOMAIN	—	—	MCP Apps iframe domain, used for CSP sandboxing. Overrides the host derived from `base_url`.
IMAGE_GENERATION_MCP_TOOLS_ALLOW	—	—	Comma-separated explicit tool names this instance exposes; every other tool is hidden from listings and cannot be invoked. Names matching no registered tool are inert. Mutually exclusive with `tools_deny`. Takes effect through `apply_tool_visibility`.
IMAGE_GENERATION_MCP_TOOLS_DENY	—	—	Comma-separated explicit tool names hidden from this instance (absent from listings, cannot be invoked). Names matching no registered tool are inert. Mutually exclusive with `tools_allow`. Takes effect through `apply_tool_visibility`.
IMAGE_GENERATION_MCP_AUTH_MODE	—	—	Explicit auth-mode override, accepting `remote` or `oidc-proxy` (case- and whitespace-insensitive). When unset the mode is auto-detected from which auth variables are set; the override exists because having all four OIDC variables set is ambiguous between those two modes. Other values are ignored with a warning.
IMAGE_GENERATION_MCP_BEARER_TOKENS_FILE	—	—	Path to a TOML file mapping bearer tokens to subjects; overrides the single-token `bearer_token` mode.
IMAGE_GENERATION_MCP_BEARER_DEFAULT_SUBJECT	—	—	Subject assigned to the single-token bearer mode; ignored when `bearer_tokens_file` is set, since mapped mode carries per-token subjects.
IMAGE_GENERATION_MCP_SERVER_NAME	—	—	Rename this server instance; defaults to the project name.
IMAGE_GENERATION_MCP_INSTRUCTIONS	—	—	Replaces the default MCP instructions text sent to clients.
IMAGE_GENERATION_MCP_HTTP_PATH	—	—	Mount path for the MCP endpoint.
PUID	—	—	Run the server process as this UID; the container entrypoint chowns writable paths to match.
PGID	—	—	Run the server process as this GID; pair with PUID to match the owner of a mounted volume.
FASTMCP_LOG_LEVEL	—	—	Log level for FastMCP internals and app loggers (DEBUG / INFO / WARNING / ERROR / CRITICAL). The -v CLI flag overrides to DEBUG.
FASTMCP_ENABLE_RICH_LOGGING	—	—	Set false for plain or structured JSON log output.
IMAGE_GENERATION_MCP_A1111_HOST	—	—	Deprecated alias for IMAGE_GENERATION_MCP_SD_WEBUI_HOST; logs a warning when used.
IMAGE_GENERATION_MCP_A1111_MODEL	—	—	Deprecated alias for IMAGE_GENERATION_MCP_SD_WEBUI_MODEL; logs a warning when used.
IMAGE_GENERATION_MCP_READ_ONLY	—	—	When true, write-tagged tools (image generation, transforms, uploads) are hidden from clients. Set false to enable them.
IMAGE_GENERATION_MCP_SCRATCH_DIR	—	—	Directory where generated images are saved. Created automatically on first use.
IMAGE_GENERATION_MCP_OPENAI_API_KEY	—	yes	OpenAI API key. Enables the OpenAI provider (gpt-image-2, gpt-image-1.5, dall-e-3) when set.
IMAGE_GENERATION_MCP_GOOGLE_API_KEY	—	yes	Google API key. Enables the Gemini provider (gemini-3.1-flash-image and others) when set. Get a key at https://aistudio.google.com/apikey.
IMAGE_GENERATION_MCP_SD_WEBUI_HOST	—	—	SD WebUI base URL (such as http://localhost:7860). Enables the SD WebUI provider when set. Compatible with AUTOMATIC1111, Forge, reForge, and Forge-neo.
IMAGE_GENERATION_MCP_SD_WEBUI_MODEL	—	—	SD WebUI checkpoint name, used for model-aware preset detection (SD 1.5 / SDXL / Lightning) and checkpoint override. Unset uses the instance's current model.
IMAGE_GENERATION_MCP_DEFAULT_PROVIDER	—	—	Provider used when no keyword triggers auto-selection: auto, openai, gemini, sd_webui, or placeholder. auto picks the first configured provider.
IMAGE_GENERATION_MCP_TRANSFORM_CACHE_SIZE	—	—	Maximum number of transformed image results (resize, crop, convert) kept in memory. Set 0 to disable caching.
IMAGE_GENERATION_MCP_PAID_PROVIDERS	—	—	Comma-separated provider names that cost money; generate_image asks for confirmation (client elicitation) before using them. An empty value falls back to this default; to disable confirmation, set a value that names no provider (such as none).
IMAGE_GENERATION_MCP_STYLES_DIR	—	—	Directory for style preset files (Markdown with YAML front matter). Created automatically if it does not exist.
IMAGE_GENERATION_MCP_ALLOW_LOCAL_FILE_INPUT	—	—	Allow reading input images from local filesystem paths. Off by default: only URLs and uploads are accepted.
IMAGE_GENERATION_MCP_MAX_INPUT_IMAGE_BYTES	—	—	Maximum accepted input image size in bytes.
IMAGE_GENERATION_MCP_FETCH_TIMEOUT_S	—	—	HTTP timeout in seconds when fetching remote image URLs (fetch_image and URL inputs).
IMAGE_GENERATION_MCP_TRANSFER_TTL_DEFAULT_S	—	—	Link lifetime in seconds when the caller requests no explicit TTL.
IMAGE_GENERATION_MCP_TRANSFER_TTL_MAX_S	—	—	Ceiling in seconds a caller-requested link TTL is clamped to.
IMAGE_GENERATION_MCP_TRANSFER_GRACE_TTL_S	—	—	Post-success grace window in seconds: a served token's TTL shrinks to this so a stalled transfer can retry within it.
IMAGE_GENERATION_MCP_TRANSFER_LEASE_S	—	—	Crashed-handler reclaim window in seconds for an in-flight reservation.
IMAGE_GENERATION_MCP_TRANSFER_MAX_UPLOAD_BYTES	—	—	Maximum size in bytes of a single upload.

Freshness

Active — last maintenance signal 25d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-09-14 · 25d ago · GitHub
Latest release
2026-08-25 · 45d ago · GitHub · v1.12.1
Package published
no data · npm/PyPI
Registry entry updated
2026-08-25 · 45d ago · official registry · v1.12.1

FAQ

›How do I install the Image Generation MCP server in Claude Code?

Run: claude mcp add image-generation -e IMAGE_GENERATION_MCP_OPENAI_API_KEY='<image-generation-mcp-openai-api-key>' -e IMAGE_GENERATION_MCP_GOOGLE_API_KEY='<image-generation-mcp-google-api-key>' -- uvx image-generation-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Image Generation require an API key?

Yes. It expects IMAGE_GENERATION_MCP_BEARER_TOKEN, IMAGE_GENERATION_MCP_OIDC_CLIENT_SECRET, IMAGE_GENERATION_MCP_OIDC_JWT_SIGNING_KEY, IMAGE_GENERATION_MCP_OPENAI_API_KEY, IMAGE_GENERATION_MCP_GOOGLE_API_KEY, of which 5 are secrets.

›Can I use Image Generation as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Image Generation in the official MCP registry?

Yes, as io.github.pvliesdonk/image-generation-mcp.