Developers and database administrators need comprehensive PostgreSQL reference material to write efficient SQL queries, design robust databases, and troubleshoot issues. This skill provides instant access to official PostgreSQL documentation including SQL syntax, connection patterns, performance tuning, and advanced features.

Polymarket is the world's largest prediction market platform. This skill provides complete documentation for building applications with their REST API, trading endpoints, and real-time WebSocket data streaming for live market data.

Hummingbot is an open-source algorithmic trading framework for cryptocurrency markets. This skill provides expert guidance on deploying trading bots, configuring exchange connectors, implementing market making and arbitrage strategies, and integrating with AI agents via MCP.

Developers need a reliable way to stream real-time cryptocurrency data from multiple exchanges. Cryptofeed provides normalized WebSocket feeds from 40+ exchanges, simplifying algorithmic trading and market data analysis.

CCXT is a complex library supporting 150+ cryptocurrency exchanges. This skill provides comprehensive documentation and examples for implementing trading APIs, market data retrieval, and automated trading strategies across multiple exchanges.

PDF documents contain valuable data that is difficult to access programmatically. This skill provides AI agents with the capabilities to extract text, tables, and form data from PDFs, and to manipulate documents through merging, splitting, and formatting operations.

Communicating data insights visually requires choosing the right chart type and mastering multiple libraries. This skill guides you through creating professional visualizations using matplotlib, seaborn, plotly, and altair.

Writing efficient SQL queries requires knowing common patterns and anti-patterns. This skill provides ready-to-use examples for CTEs, window functions, joins, and indexing strategies.

Writing database code is complex and error-prone. This skill provides battle-tested SQLAlchemy 2.0 patterns for models, queries, async sessions, transactions, and migrations.

Developers need to extract, filter, and transform data from configuration files and API responses. This skill provides ready-to-use patterns for jq and yq so you can quickly query and modify structured data without memorizing syntax.

Finding and extracting sitemap data from websites requires manual crawling and parsing. SitemapKit automates sitemap discovery and URL extraction through a simple API, enabling Claude to audit site structures and gather URL lists efficiently.