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ChatGPT supports remote MCP servers, so OpenFinance works here too.
1

Open Connectors settings

Open ChatGPT → Settings → Connectors.
2

Create a custom connector

Click Create under custom connectors.
3

Fill in the details

  • Name: OpenFinance
  • MCP Server URL: https://api.openfinance.tech/agent/mcp
  • Authentication (only if you need wallet tools): Custom header → name x-api-key, value open_xxxxx
4

Save and enable

Save and enable the connector. In a new chat, select OpenFinance from the connector picker.
Custom MCP connectors require a ChatGPT Plus, Pro, Business, or Enterprise plan.