{"id":"polygon-api","name":"Polygon.io API","homepage":"https://polygon.io","repo_url":"https://github.com/polygon-io/client-python","category":"analytics","subcategories":["financial-data","market-data","stocks","crypto"],"tags":["polygon","financial-data","stocks","market-data","crypto","options","rest-api","websocket","sdk"],"what_it_does":"Financial market data platform providing real-time and historical stock, options, forex, and crypto data via REST and WebSocket APIs with comprehensive coverage of US markets.","use_cases":["Fetching OHLCV (candlestick) data for backtesting trading strategies","Real-time stock quotes and trade streaming via WebSocket","Options chain data for derivatives analysis agents","Technical indicator data for signal generation","Ticker search and company fundamentals lookup"],"not_for":["Order execution (data only, not a broker)","International markets outside US (limited non-US coverage)","Teams needing free real-time data at scale"],"best_when":"An agent needs comprehensive US financial market data - stocks, options, crypto - for analysis or algorithmic trading signals.","avoid_when":"You need order execution (use Alpaca) or primarily need international market data.","alternatives":["alpaca-trading-api"],"af_score":79.3,"security_score":null,"reliability_score":null,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":"current","last_evaluated":"2026-03-01T09:50:06.086903+00:00","performance":{"latency_p50_ms":80,"latency_p99_ms":300,"uptime_sla_percent":99.9,"rate_limits":"Free: 5/minute; Starter: unlimited; higher tiers: faster WebSocket streaming","data_source":"llm_estimated","measured_on":null}}