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Claude Desktop can reach remote MCP servers in two ways: through its Connectors screen, or through its config file. Option A is quicker and the one we recommend; Option B suits you if you would rather manage the server by hand. These are the same steps the OpenFinance app shows on its External AI page. No API key is needed: Claude signs in to your OpenFinance account.
1

Add custom connector

In Claude Desktop, go to Settings → Connectors and click Add custom connector.
2

Configure connector

Name it OpenFinance and paste the MCP server URL:
3

Connect to OpenFinance

Click Connect on the OpenFinance connector.
4

Authorize access

When Claude first uses the MCP server, you are sent to OpenFinance. Sign in and click Authorize to give Claude access.
5

Try it out

Start a new conversation and ask, for example:
  • “Get the price-implied odds of the Golden State Warriors winning the 2026 NBA playoffs using OpenFinance”
  • “Check my OpenFinance Wallet balance”
Custom connectors are set up once per Claude account, so the same connector also appears on Claude.ai.

Option B, edit the config file

Prefer a config file? Add the server to claude_desktop_config.json with your API key instead.
1

Open Developer settings

Open Claude Desktop → Settings → Developer.
2

Edit config

Click Edit Config. Find claude_desktop_config.json and open it with a text editor.
3

Add the server

You will see something like this:
Add a comma after the preferences closing brace, then paste the mcpServers block:
Replace open_xxxxx with your key. Please make an account at openfinance.tech to get your keys.
4

Quit Claude fully

Click Claude in the menu bar → Quit Claude (or press Cmd+Q).
5

Reopen and verify

Reopen Claude Desktop. Start a new conversation, you should see a hammer icon in the chat input area.
Closing the window is not enough; you must fully quit the app for Claude Desktop to pick up the new config.