HiddenContent
Check a document for hidden text before your agent reads it. PDF, Office, RTF, HTML.
Power your agent
Add this server
The publisher's own URL. Not a PlugMCP endpoint.
Server URL
https://api.hiddencontent.ai/v1/mcp
Credentials from the publisher
- HCS_API_TOKEN — 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.
Provider
Claude Code
claude mcp add --transport http ai.hiddencontent-mcp https://api.hiddencontent.ai/v1/mcp
Run in a terminal.
Claude Desktop
{
"mcpServers": {
"ai.hiddencontent-mcp": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://api.hiddencontent.ai/v1/mcp"
]
}
}
}claude_desktop_config.json
Remote URL or a command on your machine? How the two installs differ
Run on PlugMCP
Host a copy with our keys and logs.
A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.
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Check a document for hidden text before your agent reads it. PDF, Office, RTF, HTML.
README is not crawled yet. Open the repository
- How do I install HiddenContent?
- Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
- Does HiddenContent need an API key?
- The publisher lists these environment variables: HCS_API_TOKEN, HCS_URL, HCS_CAPABILITIES.
- What transport does HiddenContent use?
- HiddenContent is reached over HTTP.
- When was HiddenContent last checked?
- Last checked 2026-10-16. Check a document for hidden text before your agent reads it. PDF, Office, RTF, HTML.
No tool list yet. Remote servers get one after the first health check.