Install the Web Tools MCP

Modellix Web Tools MCP is a remote Streamable HTTP server at https://tool.modellix.ai/mcp. It exposes Web Search and Web Fetch to MCP clients. Send POST requests only; the server does not use GET SSE and does not require Mcp-Session-Id.

This is not the Modellix Docs MCP. The Connect to Cursor / Connect to VS Code items in the page contextual menu install https://docs.modellix.ai/mcp. Use the buttons and configs on this page for Tools MCP.

What You Get

After the client lists tools, you should see:

Web Search

Tool name modellix-ai/web-search. Search the public web and return ranked results. Request fields and pricing live on the API page.

Web Fetch

Tool name modellix-ai/web-fetch. Extract readable content from public HTTP or HTTPS URLs. Request fields and pricing live on the API page.

See Tools Overview for SKUs and rates. Query history with Get Tool Logs.

Prerequisites

Get an API Key

Create a key in the Modellix console. Keep it in the MCP client or a secrets store. Do not put it in frontend code, public repos, or logs.

Choose a Stable End-User ID

Every call requires X-Mdlx-User-Id: 8–128 characters of letters, digits, -, or _. Use a stable business ID such as user_12345678. Do not use nicknames, email, phone numbers, or a new random value per request.

Required headers:

Header	Required	Value
`Authorization`	Yes	`Bearer <MODELLIX_API_KEY>`
`X-Mdlx-User-Id`	Yes	Stable end-user ID
`Content-Type`	Yes	`application/json` (clients usually set this)
`Accept`	Yes	`application/json, text/event-stream` (clients usually set this)

Install

Replace YOUR_MODELLIX_API_KEY and your-end-user-id before you use the server.

One-click install embeds placeholders. Open the client MCP settings afterward and replace the API Key and X-Mdlx-User-Id.

Cursor
VS Code
Claude Code
Codex
Other Clients

Or add the server by hand:

Open MCP Settings

Press Command + Shift + P ( Ctrl + Shift + P on Windows), search for Open MCP settings, then click Add custom MCP.

Add Modellix Tools

{
  "mcpServers": {
    "modellix-tools": {
      "url": "https://tool.modellix.ai/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_MODELLIX_API_KEY",
        "X-Mdlx-User-Id": "your-end-user-id"
      }
    }
  }
}

Or create .vscode/mcp.json:

{
  "servers": {
    "modellix-tools": {
      "type": "http",
      "url": "https://tool.modellix.ai/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_MODELLIX_API_KEY",
        "X-Mdlx-User-Id": "your-end-user-id"
      }
    }
  }
}

claude mcp add --transport http modellix-tools https://tool.modellix.ai/mcp \
  --header "Authorization: Bearer YOUR_MODELLIX_API_KEY" \
  --header "X-Mdlx-User-Id: your-end-user-id"

Confirm with claude mcp list. The entry needs "type": "http" if you edit .mcp.json by hand.

In ~/.codex/config.toml:

[mcp_servers.modellix-tools]
url = "https://tool.modellix.ai/mcp"
http_headers = { "Authorization" = "Bearer YOUR_MODELLIX_API_KEY", "X-Mdlx-User-Id" = "your-end-user-id" }

Run codex mcp list to confirm the server is registered.

Any MCP client that supports remote Streamable HTTP and custom headers can use this config. Field names vary by host; the URL and headers stay the same.

{
  "mcpServers": {
    "modellix-tools": {
      "type": "http",
      "url": "https://tool.modellix.ai/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_MODELLIX_API_KEY",
        "X-Mdlx-User-Id": "your-end-user-id"
      }
    }
  }
}

Verify

Reload the client, then ask which tools are available. You should see modellix-ai/web-search and modellix-ai/web-fetch. If the client returns 401, check the API Key. If it returns 400, check X-Mdlx-User-Id. Keep request_id from the tool result when you contact support.

Get Started

Tools

Else

Install the Web Tools MCP

What You Get

Web Search

Web Fetch

Prerequisites

Install

Verify

​What You Get

Web Search

Web Fetch

​Prerequisites

​Install

​Verify

What You Get

Prerequisites

Install

Verify