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Oct 30, 2025announcement

Polygon.io is Now Massive

Polygon.io is now Massive.com. The rebrand reflects our focus on scale, reliability, and continued innovation. Your APIs, accounts, and integrations continue to work without interruption.

Justin

editor

change stocks quotes round lots to shares Feature Image

Oct 27, 2025announcement

Upcoming Changes to Bid and Ask Sizes in Stocks Quotes

Effective Nov 3, 2025, bid_size/ask_size will be reported in shares (not round lots) across Stocks Quotes REST API, WebSocket, and Flat Files, per SEC MDI rules. The rule is forward-looking and we’ll also backfill history for consistency. Most users need no changes.

Justin

editor

querying financial markets with the polgon io mcp server claude 4 and pydantic ai Feature Image

Aug 1, 2025tutorial

Querying Financial Markets with the Massive.com MCP server, Claude 4, and Pydantic AI

Learn how to use Massive's MCP server inside of a Pydantic AI agentic workflow, alongside Anthropic's Claude 4 and the Rich Python library.

Alex Novotny

alexnovotny