Generate and edit images with Google Gemini (Nano Banana / Nano Banana Pro) image models.
Gemini-mcp is an MCP integration. Generate and edit images with Google Gemini (Nano Banana / Nano Banana Pro) image models.
The published npm package is @chrischall/gemini-mcp, version 2.3.3. Its declared MCP transport is stdio.
The package declares GEMINI_API_KEY (required): Your Google Gemini API key (aistudio.google.com/apikey); GEMINI_IMAGE_MODEL: Override the default image model (default: gemini-3.1-flash-image); GEMINI_OUTPUT_DIR: Default directory for generated images (default: current working directory); GEMINI_INPUT_DIR: Directory to resolve bare input-image filenames against; GEMINI_UPLOAD_DIR: Restrict local-file uploads to the Gemini Files API to these directories (path.delimiter-separated; unset = unrestricted); GEMINI_REFERENCE_DIR: Restrict local reference images (images / image paths sent to Gemini) to these directories (path.delimiter-separated), plus GEMINI_OUTPUT_DIR. Unset: GEMINI_UPLOAD_DIR applies; if that is unset too, unrestricted locally, and $MCP_DATA_DIR/uploads when MCP_DATA_DIR is set (hosted).
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository. This profile uses version 2.3.3 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
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| Variable | Description | Required |
|---|---|---|
| GEMINI_API_KEY | Your Google Gemini API key (aistudio.google.com/apikey) | Yes |
| GEMINI_IMAGE_MODEL | Override the default image model (default: gemini-3.1-flash-image) | Optional |
| GEMINI_OUTPUT_DIR | Default directory for generated images (default: current working directory) | Optional |
| GEMINI_INPUT_DIR | Directory to resolve bare input-image filenames against | Optional |
| GEMINI_UPLOAD_DIR | Restrict local-file uploads to the Gemini Files API to these directories (path.delimiter-separated; unset = unrestricted) | Optional |
| GEMINI_REFERENCE_DIR | Restrict local reference images (images / image paths sent to Gemini) to these directories (path.delimiter-separated), plus GEMINI_OUTPUT_DIR. Unset: GEMINI_UPLOAD_DIR applies; if that is unset too, unrestricted locally, and $MCP_DATA_DIR/uploads when MCP_DATA_DIR is set (hosted) | Optional |
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