Marvel MCP Server

Features • Tools • Setup • Configuring an MCP Host

MCP Server for the Marvel Developer API, enabling interaction with characters and comics data. The main goal of the project is to show how an MCP server can be used to interact with APIs.

Note: All data used by this MCP server is fetched from the official Marvel API and owned by Marvel. This project is not affiliated with Marvel in any way.

• List Marvel Characters: Supports filters like nameStartsWith, limit, comics, series, etc.
• Fetch a Marvel Character by ID: Get detailed info on any character using their characterId.
• Fetch Comics for a Character: Get a list of comics featuring a specific character, with various filters like format, dateRange, etc.
• Rich Content Display: When you ask about characters or comics, the server will:
  • Display detailed information about characters and comics including images, names, descriptions, and more.
  • Create an HTML page (marvel-content.html) with all the content in it.
  • Attempt to open the newly created HTML page in your default browser for an enhanced viewing experience.
• Tool-based MCP integration: Register this server with Model Context Protocol (MCP) tools (VS Code, Claude, etc.).
• Environment Configuration: Use .env file to manage environment variables like MARVEL_PUBLIC_KEY, MARVEL_PRIVATE_KEY and MARVEL_API_BASE.

• Description: Fetch Marvel characters with optional filters.
• Inputs:
  • name (optional string): Full character name.
  • nameStartsWith (optional string): Characters whose names start with the specified string.
  • modifiedSince (optional string): ISO 8601 date string to filter characters modified since this date.
  • comics, series, events, stories (optional string): Comma-separated list of IDs to filter by related entities.
  • orderBy (optional string): Fields to order the results by, such as name or -modified.
  • limit (optional number): Maximum number of results to return (1–100).
  • offset (optional number): Number of results to skip for pagination.
• Returns: JSON response with matching characters. See CharacterDataWrapperSchema in src/schemas.ts for details.

• Description: Fetch a Marvel character by their unique ID.
• Input:
  • characterId (number): The unique ID of the character.
• Returns: JSON response with the character's details. See CharacterDataWrapperSchema in src/schemas.ts for details.

• Description: Fetch comics featuring a specific character, with optional filters.
• Inputs:
  • characterId (number): The unique ID of the character.
  • Optional filters:
    • format, formatType (string): Filter by comic format (e.g., comic, hardcover).
    • noVariants, hasDigitalIssue (boolean): Flags to exclude variants or include only digital issues.
    • dateDescriptor (string): Predefined date ranges like thisWeek, nextWeek.
    • dateRange (string): Custom date range in the format YYYY-MM-DD,YYYY-MM-DD.
    • title, titleStartsWith (string): Filter by title or title prefix.
    • startYear, issueNumber, digitalId (number): Numeric filters.
    • diamondCode, upc, isbn, ean, issn (string): Identifier filters.
    • creators, series, events, stories, sharedAppearances, collaborators (string): Comma-separated list of related entity IDs.
    • orderBy (string): Fields to order the results by, such as title or -modified.
    • limit, offset (number): Pagination options.
• Returns: JSON response with comics featuring the specified character. See ComicDataWrapperSchema in src/schemas.ts for details.

• Description: Fetch lists of Marvel comics with optional filters.
• Inputs:
  • format (optional string): Filter by the issue format (e.g., comic, digital comic, hardcover).
  • formatType (optional string): Filter by the issue format type (comic or collection).
  • noVariants (optional boolean): Exclude variants (alternate covers, secondary printings, director's cuts, etc.) from the result set.
  • dateDescriptor (optional string): Return comics within a predefined date range (lastWeek, thisWeek, nextWeek, thisMonth).
  • dateRange (optional string): Return comics within a custom date range. Dates must be specified as YYYY-MM-DD,YYYY-MM-DD.
  • title (optional string): Return only issues in series whose title matches the input.
  • titleStartsWith (optional string): Return only issues in series whose title starts with the input.
  • startYear (optional number): Return only issues in series whose start year matches the input.
  • issueNumber (optional number): Return only issues in series whose issue number matches the input.
  • diamondCode, digitalId, upc, isbn, ean, issn (optional string): Filter by various identifiers.
  • hasDigitalIssue (optional boolean): Include only results which are available digitally.
  • modifiedSince (optional string): Return only comics which have been modified since the specified date (ISO 8601 format).
  • creators, characters, series, events, stories, sharedAppearances, collaborators (optional string): Comma-separated list of IDs to filter by related entities.
  • orderBy (optional string): Order the result set by a field or fields. Add a "-" to the value to sort in descending order (e.g., title, -modified).
  • limit (optional number): Limit the result set to the specified number of resources (default: 20, max: 100).
  • offset (optional number): Skip the specified number of resources in the result set.
• Returns: JSON response with matching comics. See ComicDataWrapperSchema in src/schemas.ts for details.

• Description: Fetch a single Marvel comic by its unique ID.
• Input:
  • comicId (number): The unique ID of the comic.
• Returns: JSON response with the comic details. See ComicDataWrapperSchema in src/schemas.ts for details.

• Description: Fetch Marvel characters appearing in a specific comic.
• Inputs:
  • comicId (number): The unique ID of the comic.
  • Optional filters:
    • name (optional string): Filter characters by full name.
    • nameStartsWith (optional string): Filter characters whose names start with the specified string.
    • modifiedSince (optional string): ISO 8601 date string to filter characters modified since this date.
    • series, events, stories (optional string): Comma-separated list of related entity IDs to filter by.
    • orderBy (optional string): Fields to order the results by, such as name or -modified.
    • limit (optional number): Maximum number of results to return (1–100).
    • offset (optional number): Number of results to skip for pagination.
• Returns: JSON response with characters appearing in the specified comic. See CharacterDataWrapperSchema in src/schemas.ts for details.

Sign up for a Marvel Developer API account and get your public and private API keys.

If you want to run it directly in an MCP host, jump to the Use with Claude Desktop or Use with GitHub Copilot sections.

If you'd like to run MCP Inspector locally to test the server, follow these steps:

1. Clone this repository:

   git clone https://github.com/DanWahlin/marvel-mcp

2. Rename .env.template to .env.

3. Add your Marvel API public and private keys to the .env file.

   MARVEL_PUBLIC_KEY=YOUR_PUBLIC_KEY
   MARVEL_PRIVATE_KEY=YOUR_PRIVATE_KEY
   MARVEL_API_BASE=https://gateway.marvel.com/v1/public

4. Install the required dependencies and build the project.

   npm install
   npm run build

5. (Optional) To try out the server using MCP Inspector run the following command:

   # Start the MCP Inspector
   npx @modelcontextprotocol/inspector node dist/index.js

   Visit the MCP Inspector URL shown in the console in your browser. Change Arguments to dist/index.js and select Connect. Select List Tools to see the available tools.

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "marvel-mcp": {
      "type": "stdio",
      "command": "npx",
      // "command": "node",
      "args": [
        "-y",
        "@codewithdan/marvel-mcp"
        // "/PATH/TO/marvel-mcp/dist/index.js"
      ],
      "env": {
        "MARVEL_PUBLIC_KEY": "YOUR_PUBLIC_KEY",
        "MARVEL_PRIVATE_KEY": "YOUR_PRIVATE_KEY",
        "MARVEL_API_BASE": "https://gateway.marvel.com/v1/public"
      }
    }
  }
}

To install Marvel MCP Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @DanWahlin/marvel-mcp --client claude

Note: If you already have the MCP server enabled with Claude Desktop, add chat.mcp.discovery.enabled: true in your VS Code settings and it will discover existing MCP server lists.

Add the following to your user settings file or add it to the .vscode/mcp.json file if you only want it available in this repo (you can use MCP: Add Server from the command palette and select Global or Workspace):

"mcp": {
  "inputs": [
      {
          "type": "promptString",
          "id": "marvel-public-api-key",
          "description": "Marvel public API Key",
          "password": true
      },
      {
          "type": "promptString",
          "id": "marvel-private-api-key",
          "description": "Marvel private API Key",
          "password": true
      }
  ],
  "servers": {
    "marvel-mcp": {
        "command": "npx",
        // "command": "node",
        "args": [
            "-y",
            "@codewithdan/marvel-mcp"
            // "/PATH/TO/marvel-mcp/dist/index.js"
        ],
        "env": {
            "MARVEL_PUBLIC_KEY": "${input:marvel-public-api-key}",
            "MARVEL_PRIVATE_KEY": "${input:marvel-private-api-key}",
            "MARVEL_API_BASE": "https://gateway.marvel.com/v1/public"
        }
    }
  }
}

1. Now that the mcp server is discoverable, open GitHub Copilot and select the Agent mode (not Ask or Edits).

2. Select the "refresh" button in the Copilot chat text field to refresh the server list.

3. Select the "🛠️" button to see all the possible tools, including the ones from this repo.

4. Put a question in the chat that would naturally invoke one of the tools, for example:

   List 10 marvel characters.
   
   What comics is Wolverine in?
   
   Give me details about villains in the Marvel universe.
   
   Which characters appear in the Avengers comics?
   
   What characters are in the Hedge Knight II: Sworn Sword (2007) comic?
   
   List 10 characters from Ant-Man comics.
   

   Note: If you see "Sorry, the response was filtered by the Responsible AI Service.", try running it again or rephrasing the prompt.

5. Bonus: When you ask about characters or comics, the server will automatically create a marvel-content.html file in your project root with a beautifully styled page containing all the character/comic information and images, then open it in your browser!