GuideLast updated

How to trade with DeepSeek

Short answer: The DeepSeek chat app doesn't take custom MCP servers. To trade with DeepSeek, use DeepSeek Harness (its agent CLI, which supports remote Streamable HTTP MCP) or any MCP client running a DeepSeek model, e.g. Codex, OpenClaw, Hermes or Claude Code with a DeepSeek-compatible endpoint. Point it at https://api.openfinance.tech/agent/mcp with your key as a header.

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 DeepSeek connects to tools

DeepSeek Harness loads remote MCP servers through the @deepseek-ai/dsh-mcp-client plugin, one instance per server, with transport: streamable-http, url and static headers (no interactive OAuth). Tools appear prefixed with the server name. DeepSeek models are also selectable in many MCP-capable agents.

Set up DeepSeek in under 60 seconds

  1. Install DeepSeek Harness.
  2. Add the plugin block below to your config overlay.
  3. Put your OpenFinance key in the header (static headers only).
  4. Restart Harness and ask for OpenFinance tools.
  5. Prefer a GUI? Run a DeepSeek model inside an MCP client you already use.
- insert:
  - id: mcp-openfinance
    name: '@deepseek-ai/dsh-mcp-client'
    config:
      serverName: openfinance
      transport: streamable-http
      url: https://api.openfinance.tech/agent/mcp
      headers:
        x-api-key: open_xxxxx

Or add the OpenFinance skill. In an agent that supports skills (Claude Code, Codex, OpenClaw and others, including ones running a DeepSeek model), one command installs it:

npx skills add openfinance-tech/skills

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

What DeepSeek can trade through OpenFinance

DeepSeek 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 DeepSeek

  • “Use DeepSeek reasoning to rank BTC, ETH, SOL by momentum, then long the top one 5x with $50.”
  • “Chart TSLA and buy with 3x margin; show your reasoning first.”
  • “Buy $50 of NVDA token.”
  • “Find the trending Solana memecoin with the highest liquidity and ape $20.”
  • “Is the Polymarket election market mispriced? If yes, bet $10.”

FAQ

Can the DeepSeek app trade?
Not directly: we found no custom MCP option in the DeepSeek chat app. Use DeepSeek Harness or another MCP client.

What is DeepSeek Harness?
DeepSeek's agent framework/CLI with MCP client support for stdio and Streamable HTTP servers.

Does OAuth work?
Harness headers are static only, so use an OpenFinance API key.

Can I use DeepSeek models in Claude Code or Codex?
Many clients accept OpenAI/Anthropic-compatible endpoints; DeepSeek offers compatible APIs. Then add OpenFinance in that client as usual.

Is DeepSeek good at trading?
It's a strong reasoner; execution comes from OpenFinance. Treat it as an assistant, not a guaranteed edge.

Where's my data processed?
Prompts go to whichever DeepSeek endpoint you use; orders go to OpenFinance.

Related

Sources: https://deepseekdocs.com/en/docs/features/mcp, https://github.com/deepseek-ai/deepseek-harness/blob/master/packages/mcp/README.md

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