HiddenContent

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Computer or cloud
• Transport: stdio, Streamable HTTP
• Category: Docs, sheets & office work
• You need to fill in: HCS_API_TOKEN

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet
• npmNode.js installed (for the npx command)

Which app do you use?

https://api.hiddencontent.ai/v1/mcp

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

claude mcp add hiddencontent --env HCS_API_TOKEN=your-value --env HCS_URL=your-value --env HCS_CAPABILITIES=your-value -- npx -y @hiddencontent/mcp

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

{
  "mcpServers": {
    "hiddencontent": {
      "command": "npx",
      "args": [
        "-y",
        "@hiddencontent/mcp"
      ],
      "env": {
        "HCS_API_TOKEN": "your-value",
        "HCS_URL": "your-value",
        "HCS_CAPABILITIES": "your-value"
      }
    }
  }
}

{
  "servers": {
    "hiddencontent": {
      "type": "http",
      "url": "https://api.hiddencontent.ai/v1/mcp"
    }
  }
}

{
  "servers": {
    "hiddencontent": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@hiddencontent/mcp"
      ],
      "env": {
        "HCS_API_TOKEN": "your-value",
        "HCS_URL": "your-value",
        "HCS_CAPABILITIES": "your-value"
      }
    }
  }
}

https://api.hiddencontent.ai/v1/mcp

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• HCS_API_TOKEN secret required env
  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 env
  Base URL of the service. Defaults to the hosted API; set it only when pointing at a self-hosted instance.
• HCS_CAPABILITIES env
  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 m…

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain hiddencontent.ai (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• … Not checked yet

  Endpoint responds

  Not checked yet; we check endpoints in rotation

• … Not checked yet

  Sign-in with OAuth

  Not checked yet; we check endpoints in rotation

• … Not checked yet

  No hidden instructions in tool descriptions

  Not checked yet; we read the tool list when we check the endpoint

Compared with others in Docs, sheets & office worki

• More stars than 0% of the other 2171 servers in this category
• Published to the registry more recently than 45% of the other 2171 servers in this category
• Basic checks equal to or better than 100% of the other 2171 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

No README found in the repo