HiddenContent MCP Server: Install & Setup

Install HiddenContent in Claude Code

Remote URL

Claude Code

claude mcp add --transport http hiddencontent https://api.hiddencontent.ai/v1/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "hiddencontent": {
      "url": "https://api.hiddencontent.ai/v1/mcp"
    }
  }
}

npm

Claude Code

claude mcp add hiddencontent -e HCS_API_TOKEN=... -- npx -y @hiddencontent/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "hiddencontent": {
      "command": "npx",
      "args": [
        "-y",
        "@hiddencontent/mcp"
      ],
      "env": {
        "HCS_API_TOKEN": "..."
      }
    }
  }
}

MCP Bundle (.mcpb)

Claude Code

curl -LO https://github.com/AeroSpark-ai/hiddencontent-mcp/releases/download/v0.4.15/hiddencontent.mcpb

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

Download hiddencontent.mcpb and double-click it to install in Claude Desktop.

MCP Bundles install in one click in Claude Desktop. Download the file, then open it.

Replace each ... with your own value.

Frequently asked questions

What does the HiddenContent MCP server do?

Check a document for hidden text before your agent reads it. PDF, Office, RTF, HTML.

Is the HiddenContent MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does HiddenContent run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add HiddenContent to Claude Code?

Run: claude mcp add --transport http hiddencontent https://api.hiddencontent.ai/v1/mcp

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