OnlyWorlds for Grok
com.onlyworlds/mcp
Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.
client:Grok
transport:streamable-http
tools:11
Install OnlyWorlds in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"mcp": {
"type": "http",
"url": "https://www.onlyworlds.com/mcp"
}
}
}Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs