Install in Grok

xAI documents custom MCP setup through grok.com/connectors. Bearer headers are a native field in the UI. No OAuth dance, no Developer Mode toggle. Availability depends on whether your Grok account exposes the Connectors menu.

Install on grok.com

1. Go to grok.com/connectors (sign in with your X or Google account).
2. Click New Connector → Custom.
3. Fill in the dialog:
   • MCP Server URL: https://api.youtubevideotranscript.io/mcp
   • Name: YouTube Video Transcript
   • Authentication: select Bearer / API key, then paste your key from your API keys page: yvt_live_...
4. Click Add. Grok hits our /mcp endpoint and lists the three tools it discovers.
5. Open a new chat, click + in the composer → Connectors, and toggle YouTube Video Transcript on for the conversation.

Using on mobile

Custom connectors live on your Grok account. The canonical install path is grok.com/connectors regardless of where you intend to use the connector. If your Grok mobile app shows a Connectors menu in Settings, the values are the same as the web install above; if you do not see it, sign in to the mobile app with the same account you used at grok.com.

Try it

Using the YouTube Video Transcript connector, fetch the transcript
for https://youtu.be/dQw4w9WgXcQ and give me a 3-bullet summary.

Grok shows a tool-call card, fetches the transcript, ticks 1 credit off your account, and answers using the content.

xAI API (developers)

xAI supports remote MCP tools in the chat completions API. Both the native Python SDK and the OpenAI-compatible Responses API accept the same tool descriptor.

from xai_sdk import Client
from xai_sdk.tools import mcp

client = Client(api_key="YOUR_XAI_KEY")

chat = client.chat.create(
    model="grok-4.3",
    tools=[
        mcp(
            server_url="https://api.youtubevideotranscript.io/mcp",
            server_label="youtube-video-transcript",
            authorization="Bearer yvt_live_YOUR_KEY",
        ),
    ],
)

response = chat.sample(
    "Fetch the transcript for https://youtu.be/dQw4w9WgXcQ and summarize."
)
print(response.content)

Gotchas

• In-X-app Grok. The Grok integrated into x.com / the X mobile app does not yet expose the Connectors menu. Install at grok.com with the same X account; whether the connector then surfaces inside the X feed UI is up to xAI.
• X Premium and SuperGrok are separate. Subscribing to X Premium+ does not unlock SuperGrok features and vice versa. The connector lives in your grok.com account regardless of which subscription you hold.
• Per-conversation toggle. Like ChatGPT, the connector must be enabled via the + menu at the start of each chat that uses it.
• Mobile menu visibility varies. If you don’t see Settings → Connectors on the mobile app, update to the latest build; if it is still absent, your account may not yet have the feature exposed.