generated: '2026-08-13'
method: searched
source: https://developers.neverbounce.com/changelog
url: https://developers.neverbounce.com/changelog
scheme: api-version
current_version: '4.2'
dated: false
note: >-
  NeverBounce publishes a changelog, but it is versioned rather than dated — entries are
  titled by API version and the hub exposes no publication date on them. Only three entries
  exist, the newest being version 4.2. The `updatedAt` stamp on every reference page and on
  the published OpenAPI definition is 2025-06-16, which is the last time the developer hub
  was touched at all.
entries:
- version: '4.2'
  date: null
  url: https://developers.neverbounce.com/changelog/version-42
  breaking: true
  highlights:
  - >-
    Job Callbacks introduced — applications can now react to job status changes over
    webhooks instead of polling /jobs/status.
  - >-
    [Breaking] The `acedemic_host` verification flag was renamed to `academic_host`.
  - >-
    Added `failure_reason` to the /jobs/status response, populated when a job enters a
    `failed` status.
  - >-
    API jobs are no longer eligible for manual review by default; manual review now
    requires opt-in at job creation.
  additions:
  - job callbacks
  - failure_reason
- version: '4.1'
  date: null
  url: https://developers.neverbounce.com/changelog/version-41
  breaking: false
  highlights:
  - >-
    Hybrid — real-time verification unified with historical intelligence from third-party
    data points — became the algorithm behind all verifications, with no client change
    required.
  - >-
    New `historical_response` verification flag on /single/check and /jobs/results
    indicating a result was produced from historical data.
  - >-
    New `request_meta_data[leverage_historical_data]` parameter on /single/check and
    /jobs/create to force classic real-time-only verification.
  additions:
  - historical_response flag
  - request_meta_data.leverage_historical_data
- version: null
  title: Welcome to NeverBounce
  date: null
  url: https://developers.neverbounce.com/changelog/welcome-to-neverbounce
  breaking: false
  highlights:
  - Launch post for the developer hub.