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How to trade with Claude (Anthropic)

Short answer: Claude trades through OpenFinance as a custom connector. In claude.ai or Claude Desktop go to Settings → Connectors → Add custom connector and paste https://api.openfinance.tech/agent/mcp. In Claude Code run one claude mcp add --transport http command. Claude then gets tools for crypto spot and perps, onchain stocks, forex, memecoins and Polymarket.

MCP URL: https://api.openfinance.tech/agent/mcp · HTTP streamable · works with any MCP client · one URL, no SDK · no KYC · fund with a debit card.

Setup in 60 seconds: get your OpenFinance key and start trading all markets with the cheapest fees.

How Claude connects to tools

Anthropic supports remote MCP servers as custom connectors in claude.ai and Claude Desktop (the Help Center path is Settings → Connectors → Add custom connector; some plans need an owner to enable it). Claude Code adds remote servers with claude mcp add --transport http, and accepts headers with --header. HTTP is the recommended transport; SSE is deprecated.

Set up Claude in under 60 seconds

  1. claude.ai / Desktop: Settings → Connectors → Add custom connector.
  2. Name it OpenFinance, paste https://api.openfinance.tech/agent/mcp, click Add, then Connect and sign in.
  3. In a chat, open the tools menu and make sure OpenFinance is on.
  4. Claude Code: run the command below instead (put your key in place of open_xxxxx).
  5. Ask “what OpenFinance tools do you have?” to confirm.
claude mcp add --transport http openfinance https://api.openfinance.tech/agent/mcp \
  --header "x-api-key: open_xxxxx"

Get your OpenFinance key at openfinance.tech (sidebar → External AI), then fund it with a debit card or crypto.

What Claude can trade through OpenFinance

Claude can trade crypto spot and leveraged perps on Hyperliquid, onchain stocks such as TSLA and NVDA, forex, Solana and Base memecoins, and Polymarket prediction markets, all with one OpenFinance key. The full market list is on the hub page.

Prompts to try in Claude

  • “Pull TSLA's last 90 days, mark support and resistance, then buy with 3x margin if it's above the 50-day.”
  • “Buy $50 of NVDA and set a reminder to review it Friday.”
  • “Long BTC 5x with $200; explain the funding rate before you confirm.”
  • “Write me a tiny memecoin rule: ape $20 into the top trending Solana coin only if liquidity > $500k.”
  • “Compare Polymarket election odds with the latest polls and bet $15 on whichever looks mispriced.”
  • “Short EUR/USD 2x and show my open positions as a table.”

FAQ

Can Claude actually execute trades?
Yes. With the OpenFinance connector on, Claude calls order tools that place real orders after you confirm. Without a connector Claude can only talk about trading.

Which Claude plans support custom connectors?
Anthropic offers custom connectors on its paid and some free plans; Team/Enterprise owners may have to enable them.

Claude Desktop vs Claude Code?
Desktop/web use the Connectors screen and OAuth. Claude Code uses the CLI command and an x-api-key header, which suits scripted strategies.

Is my key shown to Claude?
With OAuth, Claude never sees a key. With Claude Code the key is stored in your MCP config, not in the conversation.

Can Claude backtest?
Claude can pull candles and reason over them. OpenFinance is for live execution; there's no paper mode, so test with small size.

How do I stop Claude trading?
Turn the connector off in the chat's tools menu, or remove it in Settings → Connectors. Revoke the API key in OpenFinance for good measure.

Does it work on Claude mobile?
Connectors added on the web sync to the mobile apps.

Related

Sources: https://support.claude.com/en/articles/11175166-get-started-with-custom-connectors-using-remote-mcp, https://code.claude.com/docs/en/mcp

Trading involves risk, especially with leverage and memecoins. Start small.