generated: '2026-08-13'
method: searched
source: https://developer.close.com/api/overview/changelog
index: https://developer.close.com/api/overview/changelog/llms.txt
description: >-
  Close keeps a dated API changelog separate from the product changelog at
  close.com/changelog. Each entry is its own page under
  /api/overview/changelog/<year>/<month>/<day> and is available as markdown by
  appending .md. Entries are prose announcements, not semantic version bumps —
  Close ships additively into v1 and there is no version number attached to a
  release.
scheme: dated-entries
versioning:
  current: v1
  style: uri-path
  semver: false
  note: The API version has been v1 since launch; changes are announced, not versioned.
product_changelog: https://close.com/changelog
entry_count_published: 60
window: recent entries captured 2024-01-01 through 2026-07-21
entries:
  - date: '2026-07-21'
    title: '`user_id` and `is_group_number` deprecated on phone numbers'
    kind: deprecation
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/7/21
    highlights: >-
      The group-vs-personal phone-number distinction is being retired. The
      `sharing` field on POST /phone_number/request/internal/ is deprecated and
      now optional (defaults to `personal`). `user_id` and `is_group_number` on
      the Phone Number API are deprecated. Removal is announced for "a future
      update" with no dated sunset.
  - date: '2026-07-16'
    title: Membership creation security enhancement
    kind: behavior-change
    breaking: true
    url: https://developer.close.com/api/overview/changelog/2026/7/16
    highlights: >-
      Creating a membership via the API now requires the organization to have
      "Restrict new users to emails from these domains" enabled, and the new
      member's email must be on a verified domain. Membership creation now also
      supports API-key auth (partially reversing the 2024-06-10 restriction).
  - date: '2026-06-01'
    title: Rich text notes on Opportunities
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/6/1
  - date: '2026-05-07'
    title: Forms API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/5/7
    highlights: >-
      New read-only Forms API — list forms built in Close and inspect their
      field definitions, including field types and select-field choices.
  - date: '2026-05-04'
    title: Playbooks API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/5/4
  - date: '2026-04-10'
    title: Blocked Phone Numbers API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/4/10
  - date: '2026-04-06'
    title: OpenAPI Spec now available
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/4/6
    highlights: >-
      Close began publishing an OpenAPI spec at
      https://api.close.com/api/openapi.json, explicitly labelled experimental
      and not yet at 100% request/response schema coverage. This is the spec
      captured at openapi/_original/close-api-openapi.json.
  - date: '2026-03-06'
    title: '`applies_to` field on Outcomes deprecated for write operations'
    kind: deprecation
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/3/6
    highlights: >-
      `applies_to` is deprecated on Outcome create/update and will be derived
      from `type` in a future update. Read responses keep returning it.
  - date: '2026-01-14'
    title: Form Submissions API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2026/1/14
  - date: '2025-12-17'
    title: Sender field requirements for Email activities
    kind: behavior-change
    breaking: true
    url: https://developer.close.com/api/overview/changelog/2025/12/17
  - date: '2025-08-25'
    title: Note titles and pinned_at timestamps
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/8/25
  - date: '2025-08-14'
    title: Transcription related fields in Meeting API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/8/14
  - date: '2025-07-29'
    title: Outcome API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/7/29
  - date: '2025-07-16'
    title: Field Enrichment API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/7/16
  - date: '2025-06-25'
    title: WhatsApp Messages API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/6/25
  - date: '2025-02-14'
    title: lead_id is now optional when creating a Contact or Opportunity
    kind: relaxation
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/2/14
  - date: '2025-01-06'
    title: Updating Webhook Subscriptions
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2025/1/6
  - date: '2024-12-02'
    title: record_calls field on memberships deprecated
    kind: deprecation
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/12/2
  - date: '2024-11-06'
    title: Date format in CSV Exports
    kind: behavior-change
    breaking: true
    url: https://developer.close.com/api/overview/changelog/2024/11/6
  - date: '2024-09-09'
    title: Archiving Custom Object Types
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/9/9
  - date: '2024-08-28'
    title: Custom Objects are now public
    kind: ga
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/8/28
  - date: '2024-06-26'
    title: Delete Lead & Opportunity status change activities
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/6/26
  - date: '2024-06-20'
    title: Create Lead & Opportunity status change activities
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/6/20
  - date: '2024-06-10'
    title: Disallow Membership creation via API Keys
    kind: behavior-change
    breaking: true
    url: https://developer.close.com/api/overview/changelog/2024/6/10
  - date: '2024-06-07'
    title: Lead API only returns incomplete tasks
    kind: behavior-change
    breaking: true
    url: https://developer.close.com/api/overview/changelog/2024/6/7
  - date: '2024-04-24'
    title: Rate limit body deprecated
    kind: deprecation
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/4/24
    highlights: >-
      Rate-limit details moved out of the 429 response body; consumers must read
      the RateLimit header instead.
  - date: '2024-03-28'
    title: Commenting API
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/3/28
  - date: '2024-03-27'
    title: Pipeline fields in Opportunities
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/3/27
  - date: '2024-02-26'
    title: Files API, Email Attachments
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/2/26
  - date: '2024-02-21'
    title: Custom Objects (BETA)
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/2/21
  - date: '2024-02-15'
    title: Email Unsubscribe
    kind: addition
    breaking: false
    url: https://developer.close.com/api/overview/changelog/2024/2/15
older_entries_available: true
older_entries_note: >-
  The published index runs back to 2021-04-22 (Shared Custom Fields). Earlier
  entries are reachable from the same index at
  https://developer.close.com/api/overview/changelog/llms.txt.