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Add List Member

An MCP tool from the X (Twitter) API server, hosted on mcp.hjlabs.in.

Add List Member Adds a User to a specific List by its ID. [POST /2/lists/{id}/members]

Name on the gateway: x_api__add_lists_member · may change things.

Parameters

NameTypeDescription
id requiredstringUnique identifier of a List
user_id requiredstring

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "x_api__add_lists_member",
  "arguments": {
    "id": "…",
    "user_id": "…"
  }
}

Or connect the X (Twitter) API server directly, which lists 258 tools including this one:

Run in your terminal
claude mcp add --transport http hj-x-api https://mcp.hjlabs.in/mcp/x-api \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the add list member tool with id set to ….

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