| name | xai |
| description | Use for xAI/Grok API capabilities through the lfg xai_grok MCP — text generation, web search, X/Twitter search, image/video generation, and TTS. Load when the user wants Grok-connected xAI tools beyond built-in host tools, or when search_tool should target xai_* MCP tools. |
xAI (Grok-connected)
One skill for all lfg xai_grok MCP tools (~/.grok/plugins/lfg/mcp-runtimes/xai-grok-mcp). Use this skill instead of guessing tool names.
Setup check
- Run
lfg setup --run so the plugin ships xai_grok and lfg mirrors it into ~/.grok/config.toml as [mcp_servers.xai_grok] (required for the Grok /mcps UI). Reload MCP with r in /mcps or start a new session.
- Credentials (priority): dedicated
~/.grok/xai-grok-mcp-auth.json via lfg xai auth set-api-key, lfg xai auth set-oauth, or the MCP tools xai_auth_set_api_key / xai_auth_set_oauth; then XAI_API_KEY; then read-only Grok host ~/.grok/auth.json (host file is never written by xai_grok MCP). Never log tokens or keys.
- Do not use
/mcps OAuth authenticate (i) for xai_grok: Grok only runs that host-managed OAuth flow for HTTP/SSE MCP servers, while xai_grok is local stdio. Use xai_auth_* tools instead.
Tool flow (all capabilities)
search_tool with a specific query, e.g. "xai web search", "xai x search", "xai image generate".- Call the qualified MCP tool via
use_tool using the exact schema from step 1 (server is typically xai_grok; tool names use underscores: xai_web_search, not hyphens).
Capability router
| User intent | MCP tool | search_tool hint |
|---|
| Draft, rewrite, summarize, reason (no live web) | xai_generate_text | xai generate text |
| Current web info + citations | xai_web_search | xai web search |
| X/Twitter posts, handles, real-time social | xai_x_search | xai x search |
| Still images (Grok Imagine) | xai_image_generate | xai image generate |
| Video (text/image/reference) | xai_video_generate | xai video generate |
| Speech / TTS | xai_tts | xai tts |
Details and example payloads: references/tools.md.
Cross-cutting rules
- Text vs search: Use
xai_generate_text for closed-book generation; use xai_web_search or xai_x_search when recency or sources matter.
- X evidence: Treat posts as leads or primary-source quotes only with relevant account identity; corroborate facts via web/docs before asserting them as settled.
- Artifacts: Image/video tools may return URLs, base64, or local paths under
.grok-xai-artifacts when the schema supports artifact_dir.
- Fallback: If
xai_grok is disconnected, say so explicitly; use host-native web_search / x_search only if the user still wants a fallback.
Credential safety
Use credentials exposed by the Grok host or MCP server only. Never print, quote, summarize, or store OAuth tokens, refresh tokens, bearer tokens, or API keys.
