gemini-mcp

An MCP server that enables agents to generate and edit images using Google Gemini models. It supports direct image generation, saving characters and styles to a library for consistency, and uploading files via the Files API for reference.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by chrischall

Vendor documentation

What you can do with it

Generate images using Gemini Nano Banana models
Save and reuse character descriptions and style fragments
Upload files to a blob store for image reference

Source and maintenance

Community listingRegistry 2.4.2

mcp-registry: io.github.chrischall/gemini-mcp@2.4.2 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@chrischall/gemini-mcp 2.4.2

npm

@chrischall/gemini-mcp package definition

{
  "version": "2.4.2",
  "transport": "stdio",
  "identifier": "@chrischall/gemini-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "GEMINI_API_KEY",
      "format": "string",
      "description": "Your Google Gemini API key (aistudio.google.com/apikey)"
    },
    {
      "name": "GEMINI_IMAGE_MODEL",
      "format": "string",
      "description": "Override the default image model (default: gemini-nano-banana-2.1)"
    },
    {
      "name": "GEMINI_OUTPUT_DIR",
      "format": "string",
      "description": "Default directory for generated images (default: ~/Downloads/gemini-mcp). When set, a per-call output_dir must be inside it."
    },
    {
      "name": "GEMINI_INPUT_DIR",
      "format": "string",
      "description": "Directory to resolve bare input-image filenames against"
    },
    {
      "name": "GEMINI_UPLOAD_DIR",
      "format": "string",
      "description": "Restrict local-file uploads to the Gemini Files API to these directories (path.delimiter-separated; unset = unrestricted)"
    },
    {
      "name": "GEMINI_REFERENCE_DIR",
      "format": "string",
      "description": "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)"
    },
    {
      "name": "GEMINI_TIMEOUT_MS",
      "format": "string",
      "description": "Upstream request timeout in ms (default: 60000, or 120000 for image_size: \"4K\"); each generation tool also takes a per-call timeout_ms"
    },
    {
      "name": "GEMINI_HEARTBEAT_MS",
      "format": "string",
      "description": "Progress-notification cadence in ms while a generation runs (default: 10000; 0 disables) — keeps MCP hosts that reset their timeout on progress from timing out long generations"
    },
    {
      "name": "GEMINI_CHAIN_RETRY_MS",
      "format": "string",
      "description": "How long to wait out interactions-store lag when a chained call 404s (default: 120000; 0 disables retrying)"
    },
    {
      "name": "GEMINI_DEBUG",
      "format": "string",
      "description": "When set, emit heartbeat diagnostics to stderr. Off by default."
    },
    {
      "name": "GEMINI_RATE_CARD",
      "format": "string",
      "description": "Override/extend the shipped USD-per-1M-token rates used by gemini_token_usage's cost estimate, e.g. {\"gemini-3-pro-image\":{\"input\":2,\"text_output\":12,\"image_output\":120}}. Malformed JSON is ignored (a bad card must not fail generations)."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "gemini-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@chrischall/gemini-mcp@2.4.2"
      ],
      "env": {
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GEMINI_IMAGE_MODEL": "<YOUR_GEMINI_IMAGE_MODEL>",
        "GEMINI_OUTPUT_DIR": "<YOUR_GEMINI_OUTPUT_DIR>",
        "GEMINI_INPUT_DIR": "<YOUR_GEMINI_INPUT_DIR>",
        "GEMINI_UPLOAD_DIR": "<YOUR_GEMINI_UPLOAD_DIR>",
        "GEMINI_REFERENCE_DIR": "<YOUR_GEMINI_REFERENCE_DIR>",
        "GEMINI_TIMEOUT_MS": "<YOUR_GEMINI_TIMEOUT_MS>",
        "GEMINI_HEARTBEAT_MS": "<YOUR_GEMINI_HEARTBEAT_MS>",
        "GEMINI_CHAIN_RETRY_MS": "<YOUR_GEMINI_CHAIN_RETRY_MS>",
        "GEMINI_DEBUG": "<YOUR_GEMINI_DEBUG>",
        "GEMINI_RATE_CARD": "<YOUR_GEMINI_RATE_CARD>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "gemini-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@chrischall/gemini-mcp@2.4.2"
      ],
      "env": {
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GEMINI_IMAGE_MODEL": "<YOUR_GEMINI_IMAGE_MODEL>",
        "GEMINI_OUTPUT_DIR": "<YOUR_GEMINI_OUTPUT_DIR>",
        "GEMINI_INPUT_DIR": "<YOUR_GEMINI_INPUT_DIR>",
        "GEMINI_UPLOAD_DIR": "<YOUR_GEMINI_UPLOAD_DIR>",
        "GEMINI_REFERENCE_DIR": "<YOUR_GEMINI_REFERENCE_DIR>",
        "GEMINI_TIMEOUT_MS": "<YOUR_GEMINI_TIMEOUT_MS>",
        "GEMINI_HEARTBEAT_MS": "<YOUR_GEMINI_HEARTBEAT_MS>",
        "GEMINI_CHAIN_RETRY_MS": "<YOUR_GEMINI_CHAIN_RETRY_MS>",
        "GEMINI_DEBUG": "<YOUR_GEMINI_DEBUG>",
        "GEMINI_RATE_CARD": "<YOUR_GEMINI_RATE_CARD>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "gemini-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@chrischall/gemini-mcp@2.4.2"
      ],
      "env": {
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GEMINI_IMAGE_MODEL": "<YOUR_GEMINI_IMAGE_MODEL>",
        "GEMINI_OUTPUT_DIR": "<YOUR_GEMINI_OUTPUT_DIR>",
        "GEMINI_INPUT_DIR": "<YOUR_GEMINI_INPUT_DIR>",
        "GEMINI_UPLOAD_DIR": "<YOUR_GEMINI_UPLOAD_DIR>",
        "GEMINI_REFERENCE_DIR": "<YOUR_GEMINI_REFERENCE_DIR>",
        "GEMINI_TIMEOUT_MS": "<YOUR_GEMINI_TIMEOUT_MS>",
        "GEMINI_HEARTBEAT_MS": "<YOUR_GEMINI_HEARTBEAT_MS>",
        "GEMINI_CHAIN_RETRY_MS": "<YOUR_GEMINI_CHAIN_RETRY_MS>",
        "GEMINI_DEBUG": "<YOUR_GEMINI_DEBUG>",
        "GEMINI_RATE_CARD": "<YOUR_GEMINI_RATE_CARD>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "gemini-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@chrischall/gemini-mcp@2.4.2"
      ],
      "env": {
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GEMINI_IMAGE_MODEL": "<YOUR_GEMINI_IMAGE_MODEL>",
        "GEMINI_OUTPUT_DIR": "<YOUR_GEMINI_OUTPUT_DIR>",
        "GEMINI_INPUT_DIR": "<YOUR_GEMINI_INPUT_DIR>",
        "GEMINI_UPLOAD_DIR": "<YOUR_GEMINI_UPLOAD_DIR>",
        "GEMINI_REFERENCE_DIR": "<YOUR_GEMINI_REFERENCE_DIR>",
        "GEMINI_TIMEOUT_MS": "<YOUR_GEMINI_TIMEOUT_MS>",
        "GEMINI_HEARTBEAT_MS": "<YOUR_GEMINI_HEARTBEAT_MS>",
        "GEMINI_CHAIN_RETRY_MS": "<YOUR_GEMINI_CHAIN_RETRY_MS>",
        "GEMINI_DEBUG": "<YOUR_GEMINI_DEBUG>",
        "GEMINI_RATE_CARD": "<YOUR_GEMINI_RATE_CARD>"
      }
    }
  }
}

Let your agent find its tools

Find servers like gemini-mcp from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows

See all 1,958