open_api

Developer Portal

Powering

Real-time market data, trading, and financial intelligence — delivered through SDK, CLI, MCP and OpenAPI for developers worldwide.

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Developer Tools

Everything you need to build, test, and ship financial applications

CLI

AI-native terminal tool with interactive TUI dashboard, 120+ commands, and --format json output for scripting and AI agent integration.

TUI--format json

MCP

Hosted MCP service with OAuth 2.1 — zero-config integration for Claude Code, Cursor, Codex, Zed, and Cherry Studio.

OAuth 2.1Hosted

SDK

Get your first quote in minutes. 7 languages — Python, Node.js, Rust, Go, Java, C, C++ — with async support and built-in rate control.

PythonRustGo+ 4

Paper Trading

Test orders with real market data at zero cost. Simulated matching based on live bid-ask spreads, no securities account required.

SandboxZero Cost

LLM Ready

llms.txt standard compliance, all docs available as .md for RAG pipelines, and Accept: text/markdown header support.

Markdownllms.txt

OpenAPI

100+ endpoints for quotes, trading, portfolio, and content. Try requests directly in the browser with real-time data.

RESTWebSocket

open_api CLI

AI-native command-line tool covering every OpenAPI

120+ commands for market data, trading, fundamentals
--format json output for scripting and AI agent integration
Candlestick data with multi-period support — daily, hourly, 15-min
Portfolio P&L with position breakdown and allocation view
OAuth 2.0 — works in SSH and headless servers

CLI Documentation

$ brew install --cask open_api/tap/open_api-terminal

$ curl -fsSL https://open_api.dev/cli/install.sh | bash

$ scoop install open_api-terminal

MCP

Connect your AI assistant to live market data — no API keys required

Hosted HTTP MCP service with OAuth 2.1 authentication. Your AI coding assistant gets real-time quotes, account info, and trading capabilities in one connection.

$claude mcp add --transport http open_api https://openapi.open_api.dev/mcp

$codex mcp add --transport http open_api https://openapi.open_api.dev/mcp

$cursor mcp add --transport http open_api https://openapi.open_api.dev/mcp

$zed mcp add --transport http open_api https://openapi.open_api.dev/mcp

$cherry mcp add --transport http open_api https://openapi.open_api.dev/mcp

OAuth 2.1 — browser opens automatically on first use. No API key needed.

MCP Documentation

API Capabilities

Everything you need to build trading and market data applications

Market Data

30+

Real-time quotes, order depth, candlestick, intraday, capital flow, and push subscriptions

Real-time quotes
Order book depth
Candlestick charts
Intraday timeline
Capital flow
WebSocket push

Trading & Orders

14+

Submit, replace, and withdraw orders. Track positions, balance, and execution history

Submit orders
Modify & cancel
Positions & balance
Execution history
Order status push

Derivatives

Full option chains with Greeks, warrants listing, and real-time derivative quotes

Option chains + Greeks
Warrant filtering
Issuer directory
Derivative quotes

Financial Research

Financial statements, valuation metrics, dividend history, EPS forecasts, and analyst ratings

Financial statements
Valuation metrics
Dividend history
EPS forecasts
Analyst ratings

Content & News

Real-time news feeds, community discussions, topics, and engagement metrics

News feeds
Community topics
Discussions
Engagement data

OpenAPI SDK

Production-grade SDKs with real-time streaming and full trading capabilities

7 language SDKs built on a Rust core — subscribe to live market data, place orders, and monitor positions with async/await patterns and built-in rate limiting.

from open_api import QuoteContext, Config, OAuthBuilder

oauth = OAuthBuilder("your-client-id").build(
    lambda url: print("Visit:", url))
config = Config.from_oauth(oauth)
ctx = QuoteContext(config)

resp = ctx.quote(["AAPL.US", "TSLA.US", "NVDA.US", "GOOG.US"])
print(resp)

pip3 install open_api

Multi-Market

US, HK, SG, CN (SH/SZ) — stocks, ETFs, options, warrants

Free & Paper Trading

No additional API charges. Paper trading with real market data, no securities account required.

Real-time Push

WebSocket push for quotes, order depth, trades, and order status updates

Complete Trading

Submit, replace, withdraw orders. Trailing stops, conditional orders, and auction orders.

OAuth 2.0 + Async

Automatic token management with modern async/await patterns and built-in rate control.

SDK Documentation

Start Building in Minutes

Set up your environment, authenticate, and make your first API call — everything you need to go from zero to live data.