LongPort OpenAPI MCP Server

The LongPort OpenAPI MCP server bridges the gap between AI assistants and live market data, offering a unified interface for trading, quoting, portfolio management, and real‑time event handling. By exposing these capabilities through the Model Context Protocol, Claude or other AI clients can seamlessly embed sophisticated financial operations into conversational workflows without handling low‑level API details. This abstraction empowers developers to focus on strategy logic rather than integration boilerplate.

What Problem Does It Solve?

Financial applications often require juggling multiple SDKs, handling authentication tokens, and managing separate WebSocket connections for quotes and trade events. The MCP server consolidates all of these responsibilities into a single, language‑agnostic endpoint. Developers can issue high‑level commands—such as “place a limit order for 100 shares of AAPL” or “subscribe to real‑time price updates”—and let the server translate them into the appropriate REST calls or WebSocket messages. This reduces latency, eliminates redundant code across projects, and ensures consistent error handling.

Core Capabilities

• Trading Operations: Create, amend, and cancel orders; query order history and transaction details. The server validates requests against the user’s permissions and forwards them to LongPort’s secure trade gateway.
• Real‑time Quotes: Pull current market prices or historical data for any supported instrument. The MCP server can batch requests and cache results to minimize round‑trips.
• Portfolio Insight: Retrieve live account balances, positions, and available funds. These snapshots are refreshed on demand or pushed via subscription.
• Event Subscriptions: Subscribe to continuous streams of price changes and order status updates. The server handles WebSocket multiplexing, delivering events to the AI client in a structured format.

Real‑World Use Cases

• Algorithmic Trading Bots: An AI assistant can receive market signals, evaluate risk parameters, and trigger orders in real time—all orchestrated through MCP calls.
• Portfolio Dashboards: Developers can build interactive, AI‑powered dashboards that update instantly as new trade data arrives.
• Educational Simulators: Students can practice trading strategies by issuing commands to the MCP server, receiving feedback and simulated order execution without exposing real credentials.
• Compliance & Auditing: Every trade request is logged and can be replayed, enabling audit trails that are crucial for regulated environments.

Integration with AI Workflows

The MCP server’s resource definitions expose clear, typed endpoints that the AI model can invoke. By embedding tool calls into prompts—e.g., —the assistant can handle complex sequences such as “sell half of my holdings if the price drops below X” in a single conversational turn. The server’s prompt templates can be customized to include domain‑specific terminology, ensuring that the AI’s natural language output aligns with financial jargon. Additionally, the server’s sampling options allow developers to fine‑tune response latency and reliability, critical for high‑frequency trading scenarios.

Unique Advantages

• Multi‑Language SDK Support: The underlying LongPort OpenAPI is available in Rust, Python, Node.js, Java, C, and C++, giving teams flexibility to choose their preferred stack while still interacting via a single MCP interface.
• Security‑First Design: All sensitive credentials are stored in environment variables, and the server enforces OAuth scopes to limit access per client.
• Scalable Real‑Time Streams: The server manages WebSocket connections efficiently, supporting thousands of concurrent subscriptions without exposing the complexity to end users.
• Extensible Architecture: New market data feeds or trading instruments can be added by extending the MCP resource definitions, allowing the system to evolve with changing regulatory or product landscapes.

By centralizing market interactions behind a well‑defined MCP contract, the LongPort OpenAPI server empowers developers to build responsive, secure, and intelligent financial applications with minimal friction.