{"library":"massive-api-client","title":"Massive.com Python Client (formerly Polygon.io)","description":"Official Python client for Massive.com (formerly Polygon.io) REST and WebSocket financial data APIs. Polygon.io rebranded as Massive.com on October 30, 2025. Package renamed from polygon-api-client. Import path changed from 'polygon' to 'massive'. Both api.polygon.io and api.massive.com remain operational. Current stable version follows the polygon-api-client release cadence.","language":"python","status":"active","last_verified":"Sun Apr 19","install":{"commands":["pip install massive-api-client","pip install polygon-api-client"],"cli":null},"imports":["from massive import RESTClient","from massive.websocket import WebSocketClient"],"auth":{"required":false,"env_vars":true},"quickstart":{"code":"import os\nfrom massive import RESTClient\n\nAPI_KEY = os.environ.get('POLYGON_API_KEY') or os.environ.get('MASSIVE_API_KEY')\n\nwith RESTClient(API_KEY) as client:\n    resp = client.get_aggs('AAPL', 1, 'day', '2024-01-01', '2024-01-10')\n    for agg in resp.results:\n        print(agg)","lang":"python","description":"Both POLYGON_API_KEY and MASSIVE_API_KEY env vars work. Existing API keys continue to function after rebrand.","tag":null,"tag_description":null,"last_tested":null,"results":[]},"compatibility":null}