Tossinvest MCP Server

MCP server for Toss Securities (토스증권) Open API: Korean stock quotes, holdings, orders, technical analysis

Local serverstdio

What is the Tossinvest MCP server?

If you already use Tossinvest, the tossinvest mcp server is the piece that lets your assistant work with it directly. MCP server for Toss Securities (토스증권) Open API: Korean stock quotes, holdings, orders, technical analysis.

What the server does

토스증권 Open API를 MCP 도구로 노출하는 서버입니다. Claude 같은 AI 에이전트가 한국 주식(KRX) 시세/보유 종목/주문/기술적 분석을 도구로 사용할 수 있습니다.

Installation

tossinvest-mcp on PyPI is all you need. Most clients run it directly, so configuration is a few lines and a restart.

Credentials and setup notes

Configuration is passed through the environment: TOSS_CLIENT_ID, TOSS_CLIENT_SECRET. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

Where it fits

Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

Worth knowing first

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

How to install the Tossinvest MCP server

{
  "mcpServers": {
    "tossinvest": {
      "command": "uvx",
      "args": ["tossinvest-mcp"],
      "env": {
        "TOSS_CLIENT_ID": "your-value",
        "TOSS_CLIENT_SECRET": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

VariableDescriptionRequired
TOSS_CLIENT_IDConfiguration value read at startup.Optional
TOSS_CLIENT_SECRETCredential the server authenticates with.Yes

Frequently asked questions

It connects Tossinvest to MCP-compatible AI assistants such as Claude and Cursor. Instead of copying data back and forth by hand, the assistant works with Tossinvest directly.