Add DC Hub to Grok as a custom connector at grok.com/connectors · 94 tools, free tier, 30 seconds to install.
One click, no email to start. The key works in Grok's MCP config right away. Without an email it gets 15 free calls a day. Bind an email (free, no card) and the same key keeps working, at 50 requests/day for the rest of its 7-day trial.
Name: DC Hub
Connector URL: https://dchub.cloud/mcp?apiKey={{TRIAL_KEY}}
Authentication: leave blank
Grok runs MCP server-side and builds a fresh session for every call,
so it cannot hold a header for you: the key rides in the URL.
Keyless instead: https://dchub.cloud/mcp (previews, no key needed).
Test it: send Use DC Hub. Which US grid has the most headroom right now? and confirm a get_grid_scoreboard call fires. If Grok answers from memory with no tool call, the connector is not attached. The form’s authentication fields are not named in xAI’s connector docs; if yours differ, check current docs there. The xAI API (Remote MCP) is covered at /integrations/grok.
Anonymous: previews, no key needed. Free key: previews plus 2 full answers per tool per day. Add an email: 50 calls/day (up to 10 full answers per tool per day). Paid plans: dchub.cloud/pricing.