HiddenContent

Official

by hiddencontent

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

ai.hiddencontent/mcp (MCP)

This MCP server, ai.hiddencontent/mcp, checks documents for hidden text before an agent reads them. It supports multiple input types including PDF, Office, RTF, and HTML, enabling pre-read inspection to detect content that may not be visible.

🛠️ Key Features

Hidden text detection prior to agent reading
Document formats: PDF, Office, RTF, HTML

🚀 Use Cases

Prevent agents from processing concealed or non-obvious text in documents
Pre-scan workflows for mixed document sources (PDF and text-based formats)

⚡ Developer Benefits

Consistent pre-read validation across supported file types
Clear scope focused on hidden text checking

⚠️ Limitations

Only described as supporting PDF, Office, RTF, and HTML
No additional tooling, configuration, or capabilities are provided in the available data

Install

Configuration

Environment variables

HCS_API_TOKENrequiredsecret

API token for the HiddenContent service. Get one at https://hiddencontent.ai/start?ref=mcp-registry — the server refuses to start without it and says so.

HCS_URL

Base URL of the service. Defaults to the hosted API; set it only when pointing at a self-hosted instance.

HCS_CAPABILITIES

Comma-separated list of what your agent can actually do. The only accepted values are `tool-use`, `network-egress` and `code-execution`. These turn on the checks for concealed text that instructs a model to call a tool, send data or run code — declaring more can raise severity and never lowers it, and declaring nothing leaves those checks inert. Defaults to `tool-use` in the bundle install.

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@hiddencontent/mcp@0.4.15"
      ],
      "env": {
        "HCS_API_TOKEN": "<YOUR_HCS_API_TOKEN>",
        "HCS_URL": "<YOUR_HCS_URL>",
        "HCS_CAPABILITIES": "<YOUR_HCS_CAPABILITIES>"
      }
    }
  }
}