generated: '2026-07-22'
method: searched
source: https://massive.com/changelog
notes: >-
  Massive (formerly Polygon.io) maintains a dated changelog organized chronologically by month,
  with entries tagged by product area (REST, WebSockets, Developer Tools, Products, Website) and
  change type. polygon.io/changelog redirects to massive.com/changelog. Recent window only; the
  live changelog is the source of truth.
scheme: dated entries grouped by month, tagged by product area and change type
entries:
  - date: '2026-07-02'
    title: New Remote MCP Server
    area: Developer Tools
    kind: addition
    note: Hosted remote MCP server at https://mcp.massive.com (OAuth), complementing the open-source local server.
  - date: '2026-07-01'
    title: New 8-K Disclosures and Disclosure Categories Endpoints (Open Beta)
    area: REST
    kind: addition
  - date: '2026-06-22'
    title: Experimental Financials VX Endpoint Sunset
    area: REST
    kind: breaking
    note: Deprecation/sunset of the experimental vX financials endpoint; users migrate to replacement financials APIs.
  - date: '2026-05-05'
    title: Futures APIs Now Generally Available (v1)
    area: Futures
    kind: addition
  - date: '2026-04-28'
    title: New Form 3 and Form 4 Endpoints (Open Beta)
    area: REST
    kind: addition
  - date: '2025-12-01'
    title: Benzinga News v1 API Sunset
    area: REST
    kind: breaking
  - date: '2025-08-01'
    title: Crypto L2 WebSocket Sunset
    area: WebSockets
    kind: breaking