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Moon Banking MCP for ChatGPT

Add the Moon Banking MCP server to ChatGPT via Custom Connectors or a Custom GPT.

ChatGPT is great at fluent answers and weaker on fresh, structured facts about specific institutions. Adding the Moon Banking MCP as a Custom Connector gives ChatGPT live, tool-grounded access to every bank, country, community-rated score across 14 categories (customer service, fees & pricing, digital experience, crypto friendliness, security & trust, lending, transparency, and more), vote, and user story Moon Banking tracks.

Use it for everything from "which crypto-friendly banks operate in Argentina?" to "compare the top three US challenger banks on fees and digital experience" to "summarize what users are saying about Wells Fargo's customer service this year" — and get citable, data-grounded answers instead of generic summaries.

ChatGPT supports MCP through two distinct surfaces, and the right choice depends on your plan.

ChatGPT Plus, Pro, Team, Enterprise, and Edu users can add the Moon Banking server as a Custom Connector (the same mechanism that powers the official Notion, Gmail, etc. connectors).

  1. Open ChatGPT → Settings → Connectors → Custom Connectors → Add custom connector.
  2. Enter:
    • Name: Moon Banking
    • URL: https://mcp.moonbanking.com/mcp
  3. Save. ChatGPT will open a browser tab to authenticate with Moon Banking. Approve.
  4. In any chat, click the + button and enable the Moon Banking connector.

Custom Connectors require a paid plan with Connectors enabled for your region. Availability may vary; check help.openai.com for current rollout status.

Alternative: stdio bridge for Custom GPTs / older setups

If your plan doesn't expose Custom Connectors, you can wrap the hosted endpoint with mcp-remote for any tooling that accepts stdio MCP (eg. a self-hosted ChatGPT-compatible agent):

{
  "mcpServers": {
    "moonbanking": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.moonbanking.com/mcp"]
    }
  }
}

You can also run the stdio-only API-key package directly:

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

Verify the connection

Start a new chat and prompt:

Use the Moon Banking connector to find banks in Singapore with strong fees and pricing scores.

Troubleshooting

  • Connector option is missing. Custom Connectors are gated by plan and region. Try the mcp-remote stdio bridge instead.
  • OAuth returns to a 404. Make sure your ChatGPT browser session is logged in and that pop-ups are allowed for chatgpt.com.

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.

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