generated: '2026-07-22'
method: searched
source: https://massive.com/changelog, https://status.polygon.io/, openapi/polygon-openapi-original.json
versioning:
  scheme: uri-path
  current: mixed (v1/v2/v3 per resource family; vX for experimental endpoints)
  notes: >-
    Endpoints are versioned in the URI path (/v1/marketstatus/now, /v2/aggs/..., /v3/reference/tickers).
    Experimental endpoints ship under vX and can be sunset (the vX financials endpoint was sunset
    2026-06-22). New products enter as Open Beta before general availability (futures v1 GA 2026-05-05).
deprecation:
  policy_url: null
  practice: >-
    No standalone published deprecation-policy page was found; deprecations and sunsets are
    announced as dated changelog entries (Benzinga News v1 sunset 2025-12-01, Crypto L2 WebSocket
    sunset 2025-08-01, Financials VX sunset 2026-06-22). The official OpenAPI flags no operations
    deprecated: true, but retains legacy operations named "Deprecated*" (e.g.
    DeprecatedGetCryptoSnapshotTickerBook).
  sunset_header: null
status_page: https://status.polygon.io/
sla:
  url: null
  notes: Uptime commitments are part of Business-tier contracts; no public SLA page found.
deprecated_operations:
  - openapi/polygon-openapi-original.json#DeprecatedGetCryptoSnapshotTickerBook