Moon Banking MCP for Grok

Add the Moon Banking MCP server to Grok (xAI) as a custom connector.

Grok is built around live, current information — and the Moon Banking MCP fits that wheelhouse cleanly. Once added as a connector, Grok can query the Moon Banking dataset on demand — every bank, country, community-rated score across 14 categories (customer service, fees & pricing, digital experience, crypto friendliness, security & trust, lending, transparency, …), vote, and user story — and combine it with the real-time signal Grok already pulls from X and the open web.

Try "which European banks rank highest on crypto friendliness right now, and what are people saying about them on X?", "compare digital-experience scores across the top five US online banks", or "what are users saying about Revolut's fees lately?" — Grok will weave Moon Banking's structured data together with whatever it finds in the wild.

Grok supports remote MCP servers via Connectors, available in the xAI Console and inside grok.com for Grok 4 and newer.

Recommended: hosted (OAuth)

Go to grok.com (or the xAI Console) and open Settings → Connectors.
Choose Add custom connector (or Add MCP server, depending on your build).
Enter:
- Name: Moon Banking
- URL: https://mcp.moonbanking.com/mcp
Approve the OAuth prompt that opens in your browser.
In any chat, enable the Moon Banking connector from the input toolbar.

Alternative: stdio bridge

For environments without a Connectors UI (eg. local Grok-compatible agents, self-hosted setups, or API-key-based access), use the stdio package or wrap the hosted URL with mcp-remote:

{
  "mcpServers": {
    "moonbanking": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.moonbanking.com/mcp"]
    },
    "moonbanking-apikey": {
      "command": "npx",
      "args": ["-y", "@moonbanking/mcp-server"],
      "env": {
        "MOON_BANKING_API_KEY": "Bearer mb_sk_..."
      }
    }
  }
}

Verify the connection

In Grok, prompt:

Using the Moon Banking connector, list five banks in the US that rank highly on customer service.

Troubleshooting

Connectors panel is missing. Custom MCP connectors are a Grok 4 / SuperGrok feature. Older Grok versions don't support them.
OAuth fails silently. Try the flow in a private/incognito window; some browser extensions interfere with OAuth callbacks.

Available tools

The Moon Banking MCP server exposes the following tools (identical across every client):

bank_getByHostname
bank_get
bank_getById
bank_semanticSearch
bankVote_get
country_get
country_getByCountryCode
story_get
story_getById
world_getOverview
search_get

Full descriptions live on the main MCP page.