market-data-sdk 0.1.1

A unified SDK for Polygon and TradingEconomics with LangGraph integration

Epoch Data Research Tools

A unified SDK for accessing Polygon.io and TradingEconomics market data with LangGraph integration.

📚 Documentation | 🏗️ Architecture | ✅ Tests (31/31) | 🤝 Contributing | 📊 Status

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✨ Key Features

Universal Asset Layer

from common.models.asset import EpochAsset, AssetType

# Provider-agnostic representation
asset = EpochAsset(symbol="BTC-USD", asset_type=AssetType.CRYPTO)
asset.to_epoch_asset_id()  # → "^BTCUSD-Crypto"

Polygon Integration

from epoch_polygon.registry import get_tools

# Get 8 LangGraph tools
tools = get_tools()

# Use with agent
from langgraph.prebuilt import create_react_agent
agent = create_react_agent(llm, tools)

Generic Execution

Single _execute() method handles ALL Polygon endpoints:

• ✅ Stocks, Crypto, Forex, Options, Indices, Futures
• ✅ Type-based detection (no field name assumptions)
• ✅ market_type injection, pair splitting, date filters

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🚀 Quick Start

1. Installation

# Clone repository
git clone <repo-url>
cd EpochDataResearchTools

# Create virtual environment
python -m venv .venv
source .venv/bin/activate  # Windows: .venv\Scripts\activate

# Install package
pip install -e ".[dev]"

2. Set up API keys

cp .env.example .env
# Edit .env and add:
# POLYGON_API_KEY=your_key_here

3. Run tests

pytest  # 31/31 tests passing ✅

4. Try examples

python examples/polygon/basic_aggregates.py

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📦 Package Structure

EpochDataResearchTools/
├── src/
│   ├── common/              # Universal models (EpochAsset)
│   ├── epoch_polygon/       # Polygon adapter
│   └── tradingeconomics/    # TradingEconomics adapter
│
├── tests/                   # 31 passing tests
│   ├── common/              # 13 EpochAsset tests
│   └── polygon/             # 18 Polygon tests
│
├── examples/                # Ready-to-run examples
├── docs/                    # Comprehensive documentation
└── [config files]

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🎯 Usage Examples

Basic: Get Stock Data

from common.models.asset import EpochAsset, AssetType
from epoch_polygon.models.asset import PolygonAsset
from epoch_polygon.models.requests import AggregatesRequest
from epoch_polygon.models.filters import DateFilter
from epoch_polygon.registry import get_tools

# 1. Create universal asset
epoch_asset = EpochAsset(symbol="AAPL", asset_type=AssetType.STOCK)

# 2. Convert to Polygon format
polygon_asset = PolygonAsset.from_epoch_asset(epoch_asset)

# 3. Create request
request = AggregatesRequest(
    asset=polygon_asset,
    date_filter=DateFilter.last_n_days(30),
    timespan="day",
    multiplier=1
)

# 4. Use with tools
tools = get_tools()
# tools[0].invoke(request.model_dump())

Advanced: LangGraph Agent

from langgraph.prebuilt import create_react_agent
from langchain_openai import ChatOpenAI
from epoch_polygon.registry import get_tools

# Create agent with Polygon tools
llm = ChatOpenAI(model="gpt-4")
tools = get_tools()
agent = create_react_agent(llm, tools)

# Ask questions
result = agent.invoke({
    "messages": [("user", "What was AAPL's closing price yesterday?")]
})

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🏗️ Architecture

EpochAsset Flow

Agent → EpochAsset → PolygonAsset.from_epoch_asset() → Polygon API
                  → TEAsset.from_epoch_asset() → TE API

Asset Conventions

• Stocks: AAPL, TSLA → "AAPL-Stock"
• Crypto: BTC-USD, BTC (defaults to USD) → "^BTCUSD-Crypto"
• Forex: EUR-USD → "^EURUSD-Forex"
• Futures: ES → "ES-Future"
• Indices: SPX → "^SPX-Index"

See EPOCH_ASSET_ARCHITECTURE.md for details.

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✅ Testing

# All tests
pytest

# Specific suite
pytest tests/common/     # EpochAsset tests
pytest tests/polygon/    # Polygon tests

# With coverage
pytest --cov=src --cov-report=html

# Verbose
pytest -v

Current Status: 31/31 tests passing (0.88s)

See TEST_RESULTS.md for details.

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📚 Documentation

• Documentation Index - Start here
• Architecture Guide - Universal asset layer
• Package Structure - Code organization
• Test Results - Coverage details
• Summary - Implementation overview
• Contributing - Development guidelines
• Project Status - Current state & roadmap

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🛣️ Roadmap

Completed ✅

• Universal asset layer (EpochAsset)
• Polygon integration (4 clients, 8 tools)
• Generic _execute() for all endpoints
• Comprehensive test suite (31 tests)
• Organized documentation

In Progress 🚧

• TradingEconomics integration

Planned 📋

• More Polygon endpoints (indicators, financials, reference)
• from_epoch_asset_id() parser
• Real-world integration tests
• Performance benchmarks

See TODO.md for detailed roadmap.

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🤝 Contributing

See CONTRIBUTING.md for:

• Development setup
• Code standards
• Architecture patterns
• Testing guidelines
• PR process

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📄 License

MIT License

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🔗 Links

• Polygon.io API - Stock market data
• TradingEconomics - Economic data
• LangGraph - Agent framework