Connect Gemini to Crane Ledger

Use Google Gemini (CLI or Gemini Enterprise) with Crane Ledger’s hosted MCP endpoint.

Prerequisites

1. A Crane Ledger account and API key (or OAuth credentials for Enterprise).
2. Gemini CLI, and/or Gemini Enterprise with permission to add a custom MCP data store.

MCP endpoint

Organization scope comes from your OAuth token or API key — you do not pass organization_id separately.

Scopes: ledger:read, ledger:write, and optionally ledger:admin.

See Authentication and MCP tools.

Gemini CLI

Add Crane Ledger to ~/.gemini/settings.json (field names may vary slightly by CLI version — prefer remote HTTP / URI pointing at the MCP URL):

{
  "mcpServers": {
    "crane-ledger": {
      "httpUrl": "https://api.craneledger.ai/mcp",
      "headers": {
        "Authorization": "Bearer ha_live_your_key_here"
      }
    }
  }
}

If your CLI build expects url / uri instead of httpUrl, use that key with the same URL and Authorization header. Restart the CLI after saving.

Gemini Enterprise (custom MCP datastore)

Admins can add a Custom MCP Server data store:

1. Open Gemini Enterprise → Data stores → Custom MCP Server.
2. MCP Server URL: https://api.craneledger.ai/mcp (Streamable HTTP only).
3. Configure OAuth 2.0 against Crane Ledger’s authorization server (https://auth.craneledger.ai) — authorization URL, token URL, client id/secret as required by Google’s connector form.
4. Create the connector, enable actions/tools, then authorize from the Gemini Enterprise chat UI and toggle the connector on.

Example prompts

Once connected, try:

• "Set up a basic chart of accounts for a small service business"
• "Create an invoice for $2,500 to Acme Corp for consulting"
• "What's our cash position right now?"
• "Show me profit and loss for last quarter"
• "How many credits do I have left?"

Troubleshooting

Related

• Connect your AI overview
• Authentication
• MCP tools

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