generated: '2026-09-18'
method: searched
source: https://developer.gemini.com/changelog/revision-history
scheme: dated entries grouped by product area and protocol, newest first
cadence: Very active - 246 dated entries are published on the revision-history page, with 2026-09-16 the most recent
  and entries landing several times a month.
entry_count_published: 246
current_versions:
  rest: 1.0.0
  prediction-markets: 1.0.0
  websocket: 0.10.7
breaking_changes_marked: false
breaking_changes_note: The changelog does not label an entry breaking. The 2026-09-10 entry adding a REQUIRED symbol
  parameter to POST /v1/margin/account and removing /v1/feepromos reads identically in form to a documentation typo
  fix. Breaking flags below are this pipeline's reading of the text, not the provider's label.
recent_entries:
- date: '2026-09-16'
  area: Prediction Markets / REST
  breaking: false
  highlights:
  - Removed the undocumented contracts[].totalShares field from the Contract schema on GET /v1/prediction-markets/events/{eventTicker}
    - never implemented by the backend
- date: '2026-09-11'
  area: Prediction Markets / REST
  breaking: false
  highlights:
  - Documented the events[] field returned by List Events and Get Event for game markets, including full child event
    objects
- date: '2026-09-10'
  area: Margin / Prediction Markets / REST
  breaking: true
  highlights:
  - Added REQUIRED symbol request parameter to POST /v1/margin/account (breaking for existing callers)
  - Removed the deprecated /v1/feepromos endpoint from the REST specification and the TypeScript SDK
  - Added Collateral Return documentation for Prediction Markets
  - Documented the optional symbol parameter on /v1/notionalvolume for stablecoin promo tiers
  - Added endpoint-specific private rate limits (past transfers, custody fee transfers, deposit addresses) to the
    Rate Limits page
- date: '2026-09-09'
  area: Prediction Markets / Sports Ticker Format
  breaking: false
  highlights:
  - Corrected Team Total (-TT) documentation to distinguish FIFA World Cup regulation-time goals from NFL full-game
    points including overtime
- date: '2026-09-03'
  area: Prediction Markets / Combo RFQ WebSocket
  breaking: false
  highlights:
  - Added optional maker clientId to rfq.submit_quote, returned as c on the maker authenticated fill event
- date: '2026-09-02'
  area: Prediction Markets
  breaking: false
  highlights:
  - Added the Tennis "Exact match score" market to the market mapping table
  - 'Corrected settlement stream documentation: settlements@account is not a production stream'
- date: '2026-08-27'
  area: Prediction Markets / Combo RFQ WebSocket
  breaking: false
  highlights:
  - Added optional per-leg instrument symbol (s) to each leg in the requestForQuote broadcast
- date: '2026-08-26'
  area: Prediction Markets
  breaking: false
  highlights:
  - Added a Maker Fee-Free Trading Promo from 2026-09-02 through 2026-12-31
upcoming:
  url: https://developer.gemini.com/changelog/upcoming-changes
  status: 200
  content: TBD
  note: The forward-looking page exists but is empty - see lifecycle/gemini-trust-lifecycle.yml.