> ## Documentation Index
> Fetch the complete documentation index at: https://docs.growthbook.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Update a single holdout
> Updates a Holdout. Use the start, start-analysis, and stop endpoints to move it through its lifecycle.
## OpenAPI
````yaml openapi.yaml PUT /v1/holdouts/{id}
openapi: 3.1.0
info:
version: 5.0.1
title: GrowthBook REST API
description: >
GrowthBook offers a full REST API for interacting with the application.
Request data can use either JSON or Form data encoding (with proper
`Content-Type` headers). All response bodies are JSON-encoded.
The API base URL for GrowthBook Cloud is `https://api.growthbook.io/api`.
For self-hosted deployments, it is the same as your API_HOST environment
variable (defaults to `http://localhost:3100/api`). The rest of these docs
will assume you are using GrowthBook Cloud.
## Versioning
Endpoints are versioned by path prefix:
- `/v1/...` — stable, widely-supported endpoints
- `/v2/...` — updated endpoints with improved shapes (e.g. unified per-rule
environment scope for feature flags)
New integrations should prefer v2 where available.
## Authentication
We support both the HTTP Basic and Bearer authentication schemes for
convenience.
You first need to generate a new API Key in GrowthBook. Different keys have
different permissions:
- **Personal Access Tokens**: These are sensitive and provide the same level
of access as the user has to an organization. These can be created by going
to `Personal Access Tokens` under the your user menu.
- **Secret Keys**: These are sensitive and provide the level of access for
the role, which currently is either `admin` or `readonly`. Only Admins with
the `manageApiKeys` permission can manage Secret Keys on behalf of an
organization. These can be created by going to `Settings -> API Keys`
If using HTTP Basic auth, pass the Secret Key as the username and leave the
password blank (when using curl, add `:` at the end of the secret to
indicate an empty password)
```bash
curl https://api.growthbook.io/api/v1/features \
-u secret_abc123DEF456:
```
If using Bearer auth, pass the Secret Key as the token:
```bash
curl https://api.growthbook.io/api/v1/features \
-H "Authorization: Bearer secret_abc123DEF456"
```
## Errors
The API may return the following error status codes:
- **400** - Bad Request - Often due to a missing required parameter
- **401** - Unauthorized - No valid API key provided
- **402** - Request Failed - The parameters are valid, but the request
failed
- **403** - Forbidden - Provided API key does not have the required access
- **404** - Not Found - Unknown API route or requested resource
- **422** - Unprocessable Entity - The request is valid, but a warning,
validation rule, approval requirement, or another publishing gate blocked
it. Do not assume that `ignoreWarnings` clears every 422 response.
- **429** - Too Many Requests - You exceeded the rate limit of 60 requests
per minute. Try again later.
- **5XX** - Server Error - Something went wrong on GrowthBook's end (these
are rare)
The response body will be a JSON object with the following properties:
- **message** - Information about the error
### Publishing gates
Publish responses include a `gates` array that explains every blocker:
- `type`, `severity`, and `messages` identify the problem.
- `override` names the request-body field that can bypass it. This is
`ignoreWarnings` for warnings, `skipSchemaValidation` for schema and
invariant failures, or `skipHooks` for Custom Hook rejections. A value of
`null` means there is no request-body override.
- `requiresPermission` identifies any additional permission needed to use
the override.
- `resolution` provides an API action, method, and path when the blocker
must be resolved another way.
For example, an approval gate is cleared by approving the revision or by
using a caller with **Bypass draft approvals** access. A Config lock is
cleared through the unlock route in `resolution`.
When a successful publish bypasses a gate, the response includes
`bypassedGates`. Each entry reports the gate `type` and how it was bypassed
in `via`, which is one of `ignoreWarnings`, `skipSchemaValidation`,
`skipHooks`, `bypassApprovalPermission`, `restApiBypassesReviews`, or
`revertsBypassApproval` (reverts only). This field is omitted when no gates
were bypassed.
servers:
- url: https://api.growthbook.io/api
description: GrowthBook Cloud
- url: https://{domain}/api
description: Self-hosted GrowthBook
variables:
domain:
default: localhost:3100
description: Your self-hosted GrowthBook host (and port)
security:
- bearerAuth: []
- basicAuth: []
tags:
- name: projects
x-displayName: Projects
description: Projects are used to organize your feature flags and experiments
- name: environments
x-displayName: Environments
description: >-
GrowthBook comes with one environment by default (production), but you can
add as many as you need. When used with feature flags, you can
enable/disable feature flags on a per-environment basis.
- name: features-v2
x-displayName: Feature Flags
description: >-
Control your feature flags programatically.
Rules are returned as a unified top-level array; each rule carries
`allEnvironments` / `environments` scope fields instead of being bucketed
by environment.
- name: feature-revisions-v2
x-displayName: Feature Revisions
description: >-
Draft revisions for feature flags, including rules, scheduling, and
approval workflows.
Revision `rules` is a flat array with per-rule scope fields.
- name: features
x-displayName: Feature Flags (legacy)
description: >-
Control your feature flags programatically.
**These are v1 endpoints.** New integrations should use the v2 Feature
Flags endpoints, which expose a unified per-rule environment scope instead
of per-environment rule arrays.
- name: feature-revisions
x-displayName: Feature Revisions (legacy)
description: >-
Draft revisions for feature flags, including rules, scheduling, and
approval workflows.
**These are v1 endpoints.** New integrations should use the v2 Feature
Revisions endpoints.
- name: ramp-schedules
x-displayName: Ramp Schedules
description: >-
Multi-step rollout schedules that gradually increase feature rule traffic
over time, with optional real-time monitoring. Each step supports interval
timers, approval gates, and hold conditions. Monitored steps are backed by
a live analysis experiment that can automatically hold, roll back, or
advance the ramp based on guardrail and signal metric health.
- name: data-sources
x-displayName: Data Sources
description: >-
How GrowthBook connects and queries your data, including cached database
schema metadata (information schemas) for tables and columns.
- name: fact-tables
x-displayName: Fact Tables
description: Fact Tables describe the shape of your data warehouse tables
- name: fact-metrics
x-displayName: Fact Metrics
description: Fact Metrics are metrics built on top of Fact Table definitions
- name: metrics
x-displayName: Metrics (legacy)
description: Metrics used as goals and guardrails for experiments
- name: experiments
x-displayName: Experiments
description: Experiments (A/B Tests)
- name: namespaces
x-displayName: Namespaces
description: >-
Namespaces partition your user population into buckets so that experiments
using the same hash attribute do not overlap unintentionally. Each
namespace defines a 0–1 range and individual experiments claim sub-ranges
within it.
- name: snapshots
x-displayName: Experiment Snapshots
description: Experiment Snapshots (the individual updates of an experiment)
- name: dimensions
x-displayName: Dimensions
description: Dimensions used during experiment analysis
- name: segments
x-displayName: Segments
description: Segments used during experiment analysis
- name: reports
x-displayName: Experiment Reports
description: >-
Custom analysis reports built on top of experiment snapshots. Reports let
you re-run analysis with different metrics, date ranges, stats engines,
and other settings without modifying the underlying experiment.
- name: sdk-connections
x-displayName: SDK Connections
description: Client keys and settings for connecting SDKs to a GrowthBook instance
- name: visual-changesets
x-displayName: Visual Changesets
description: Groups of visual changes made by the visual editor to a single page
- name: saved-groups
x-displayName: Saved Groups
description: >-
Defined sets of attribute values which can be used with feature rules for
targeting features at particular users.
- name: saved-group-revisions
x-displayName: Saved Group Revisions
description: >-
Draft revisions for saved groups, including pending changes, approvals,
and lifecycle (publish, discard, revert).
Most callers can interact with these endpoints via shorthand actions
(`/items/add`, `/items/remove`, single-field PUTs) instead of authoring
JSON Patch ops directly. Pass `version: "new"` on edit endpoints to
auto-create a draft.
- name: constants
x-displayName: Constants
description: >-
**Beta** — these endpoints are new and may change in
backwards-incompatible ways.
Reusable named values referenced from feature flag values as `@const:key`
and resolved into the SDK payload at build time. String constants are
interpolated via `{{ @const:key }}`; JSON (object) constants are composed
via an `$extends` array. A constant's own keys **replace** what its
`$extends` bases provide, wholesale — constants are atomic building
blocks. (Config and feature values compose as deep, targeted patches
instead.)
- name: constant-revisions
x-displayName: Constant Revisions
description: >-
**Beta** — these endpoints are new and may change in
backwards-incompatible ways.
Draft revisions for constants, including pending changes, approvals, and
lifecycle (publish, discard, revert). Pass `version: "new"` on edit
endpoints to auto-create a draft.
- name: configs
x-displayName: Configs
description: >-
**Beta** — these endpoints are new and may change in
backwards-incompatible ways.
Reusable, typed, inheritable JSON objects referenced from feature flag
values as `@config:key`. A config carries a field `schema` (with
TypeScript/JSON Schema import-export) and a lineage `parent`. Inheritance
is expressed via `parent`, never an in-value `@config:` entry. Values
layer as a **deep, targeted patch**: a child (or a config-backed feature
value) restates only the leaves it changes and inherits the rest — unlike
a constant's `$extends`, whose own keys replace wholesale. Schema fields
colliding with a published ancestor's key follow 'base wins': identical
re-declarations are stripped with a warning, differing ones are rejected.
- name: config-revisions
x-displayName: Config Revisions
description: >-
**Beta** — these endpoints are new and may change in
backwards-incompatible ways.
Draft revisions for configs, including value and schema edits, schema
import (JSON Schema / TypeScript / inferred), approvals, and lifecycle
(publish, discard, revert). Publishing a schema change cascades the "base
wins" normalization to descendant configs; a publish that removes or
retypes fields descendants still use soft-blocks with a 422 unless the
request body sets `ignoreWarnings: true`. Pass `version: "new"` on edit
endpoints to auto-create a draft.
- name: releases
x-displayName: Releases
description: >-
**Beta** — these endpoints are new and may change in
backwards-incompatible ways.
Coordinated multi-entity publishing: publish a set of revisions across
Feature Flags, Saved Groups, configs, and constants as one all-or-nothing
operation, validated against the combined end-state instead of each
in-between state. Requires the `releases` commercial feature.
- name: custom-hooks
x-displayName: Custom Hooks
description: >-
Sandboxed JavaScript validation hooks that run when features, configs, or
their revisions are saved or published. Throwing an Error blocks the save;
`addWarning(msg)` raises a soft warning. Hooks are scoped by projects, or
pinned to a single feature/config via `entityType`/`entityId`; a
config-scoped hook also runs for every config inheriting from it (its
whole descendant lineage). Scope can be retargeted on update (or cleared
with nulls). Requires an enterprise plan; not available on GrowthBook
Cloud.
- name: organizations
x-displayName: Organizations
description: >-
Organizations are used for multi-org deployments where different teams can
run their own isolated feature flags and experiments. These endpoints are
only via a super-admin's Personal Access Token.
- name: members
x-displayName: Members
description: Members are users who have been invited to an organization.
- name: code-references
x-displayName: Code References
description: >-
Intended for use with our code reference CI utility,
[`gb-find-code-refs`](https://github.com/growthbook/gb-find-code-refs).
- name: archetypes
x-displayName: Archetypes
description: >-
Archetypes allow you to simulate the result of targeting rules on pre-set
user attributes
- name: queries
x-displayName: Queries
description: Retrieve queries used in experiments to calculate results.
- name: settings
x-displayName: Settings
description: Get the organization settings.
- name: attributes
x-displayName: Attributes
description: Used when targeting feature flags and experiments.
- name: usage
x-displayName: Usage
description: Usage information for metrics in experiments.
- name: meta
x-displayName: Meta
description: >-
Server metadata, including the running build's version and commit for
version-skew checks.
- name: ContextualBandits
x-displayName: Contextual Bandits
description: ''
- name: Dashboards
x-displayName: Dashboards
description: ''
- name: ContextualBanditQueries
x-displayName: Contextual Bandit Queries
description: ''
- name: CustomFields
x-displayName: Custom Fields
description: ''
- name: MetricGroups
x-displayName: Metric Groups
description: ''
- name: Teams
x-displayName: Teams
description: ''
- name: ExperimentTemplates
x-displayName: Experiment Templates
description: ''
- name: AnalyticsExplorations
x-displayName: Analytics Explorations
description: ''
- name: RampScheduleTemplates
x-displayName: Ramp Schedule Templates
description: Reusable step configurations for ramp schedules.
- name: Learnings
x-displayName: Learnings
description: >-
Saved learnings captured across experiments, including AI-discovered
patterns.
- name: Holdouts
x-displayName: Holdouts
description: >-
Hold a share of traffic out of all experiments to measure their combined
effect.
- name: AggregatedFactTable_model
x-displayName: Aggregated Fact Table
description:
- name: AnalyticsExploration_model
x-displayName: Analytics Exploration
description:
- name: Archetype_model
x-displayName: Archetype
description:
- name: Attribute_model
x-displayName: Attribute
description:
- name: CodeRef_model
x-displayName: Code Ref
description:
- name: Config_model
x-displayName: Config
description:
- name: ConfigKeyUsage_model
x-displayName: Config Key Usage
description:
- name: ConfigLineage_model
x-displayName: Config Lineage
description:
- name: ConfigReferences_model
x-displayName: Config References
description:
- name: ConfigRevision_model
x-displayName: Config Revision
description:
- name: ConfigRevisionActivityLogEntry_model
x-displayName: Config Revision Activity Log Entry
description: >-
- name: ConfigRevisionRef_model
x-displayName: Config Revision Ref
description:
- name: ConfigRevisionReview_model
x-displayName: Config Revision Review
description:
- name: ConfigSchemaExport_model
x-displayName: Config Schema Export
description:
- name: ConfigSchemaSource_model
x-displayName: Config Schema Source
description:
- name: ConfigSchemaVerify_model
x-displayName: Config Schema Verify
description:
- name: ConfigSchemaWarning_model
x-displayName: Config Schema Warning
description:
- name: Constant_model
x-displayName: Constant
description:
- name: ConstantReferences_model
x-displayName: Constant References
description:
- name: ConstantRevision_model
x-displayName: Constant Revision
description:
- name: ConstantRevisionActivityLogEntry_model
x-displayName: Constant Revision Activity Log Entry
description: >-
- name: ConstantRevisionRef_model
x-displayName: Constant Revision Ref
description:
- name: ConstantRevisionReview_model
x-displayName: Constant Revision Review
description: >-
- name: ContextualBandit_model
x-displayName: Contextual Bandit
description:
- name: ContextualBanditQuery_model
x-displayName: Contextual Bandit Query
description: >-
- name: CustomField_model
x-displayName: Custom Field
description:
- name: CustomHook_model
x-displayName: Custom Hook
description:
- name: Dashboard_model
x-displayName: Dashboard
description:
- name: DataSource_model
x-displayName: Data Source
description:
- name: Dimension_model
x-displayName: Dimension
description:
- name: Environment_model
x-displayName: Environment
description:
- name: EventUser_model
x-displayName: Event User
description:
- name: Experiment_model
x-displayName: Experiment
description:
- name: Experiment Rule_model
x-displayName: Experiment Rule
description:
- name: ExperimentAnalysisSettings_model
x-displayName: Experiment Analysis Settings
description: >-
- name: ExperimentDecisionFrameworkSettings_model
x-displayName: Experiment Decision Framework Settings
description: >-
- name: ExperimentMetric_model
x-displayName: Experiment Metric
description:
- name: ExperimentMetricOverrideEntry_model
x-displayName: Experiment Metric Override Entry
description: >-
- name: ExperimentResults_model
x-displayName: Experiment Results
description:
- name: ExperimentSnapshot_model
x-displayName: Experiment Snapshot
description:
- name: ExperimentTemplate_model
x-displayName: Experiment Template
description:
- name: ExperimentWithEnhancedStatus_model
x-displayName: Experiment With Enhanced Status
description: >-
- name: FactMetric_model
x-displayName: Fact Metric
description:
- name: FactTable_model
x-displayName: Fact Table
description:
- name: FactTableColumn_model
x-displayName: Fact Table Column
description:
- name: FactTableFilter_model
x-displayName: Fact Table Filter
description:
- name: FeatureBaseRule_model
x-displayName: Feature Base Rule
description:
- name: FeatureContextualBanditRefRule_model
x-displayName: Feature Contextual Bandit Ref Rule
description: >-
- name: FeatureDefinition_model
x-displayName: Feature Definition
description:
- name: FeatureEnvironmentV1_model
x-displayName: Feature Environment V1
description:
- name: FeatureEnvironmentV2_model
x-displayName: Feature Environment V2
description:
- name: FeatureExperimentRefRule_model
x-displayName: Feature Experiment Ref Rule
description: >-
- name: FeatureExperimentRule_model
x-displayName: Feature Experiment Rule
description: >-
- name: FeatureForceRule_model
x-displayName: Feature Force Rule
description:
- name: FeatureRevisionRef_model
x-displayName: Feature Revision Ref
description:
- name: FeatureRevisionSummary_model
x-displayName: Feature Revision Summary
description: >-
- name: FeatureRevisionV1_model
x-displayName: Feature Revision V1
description:
- name: FeatureRevisionV2_model
x-displayName: Feature Revision V2
description:
- name: FeatureRolloutRule_model
x-displayName: Feature Rollout Rule
description:
- name: FeatureRuleV1_model
x-displayName: Feature Rule V1
description:
- name: FeatureRuleV2_model
x-displayName: Feature Rule V2
description:
- name: FeatureSafeRolloutRule_model
x-displayName: Feature Safe Rollout Rule
description: >-
- name: FeatureV1_model
x-displayName: Feature V1
description:
- name: FeatureV2_model
x-displayName: Feature V2
description:
- name: FeatureWithRevisionsV1_model
x-displayName: Feature With Revisions V1
description: >-
- name: FeatureWithRevisionsV2_model
x-displayName: Feature With Revisions V2
description: >-
- name: Holdout_model
x-displayName: Holdout
description:
- name: InformationSchema_model
x-displayName: Information Schema
description:
- name: InformationSchemaTable_model
x-displayName: Information Schema Table
description: >-
- name: Learning_model
x-displayName: Learning
description:
- name: LookbackOverride_model
x-displayName: Lookback Override
description:
- name: Member_model
x-displayName: Member
description:
- name: Metric_model
x-displayName: Metric
description:
- name: MetricAnalysis_model
x-displayName: Metric Analysis
description:
- name: MetricGroup_model
x-displayName: Metric Group
description:
- name: MetricUsage_model
x-displayName: Metric Usage
description:
- name: Namespace_model
x-displayName: Namespace
description:
- name: NamespaceExperimentMember_model
x-displayName: Namespace Experiment Member
description: >-
- name: Organization_model
x-displayName: Organization
description:
- name: PaginationFields_model
x-displayName: Pagination Fields
description:
- name: Project_model
x-displayName: Project
description:
- name: Query_model
x-displayName: Query
description:
- name: RampSchedule_model
x-displayName: Ramp Schedule
description:
- name: RampScheduleTemplate_model
x-displayName: Ramp Schedule Template
description:
- name: Report_model
x-displayName: Report
description:
- name: RequireReviewRule_model
x-displayName: Require Review Rule
description:
- name: RequireReviewRuleInput_model
x-displayName: Require Review Rule Input
description: >-
- name: RevisionIdRef_model
x-displayName: Revision Id Ref
description:
- name: Safe Rollout Rule_model
x-displayName: Safe Rollout Rule
description:
- name: SavedGroup_model
x-displayName: Saved Group
description:
- name: SavedGroupApprovalRule_model
x-displayName: Saved Group Approval Rule
description: >-
- name: SavedGroupReferences_model
x-displayName: Saved Group References
description:
- name: SavedGroupRevision_model
x-displayName: Saved Group Revision
description:
- name: SavedGroupRevisionActivityLogEntry_model
x-displayName: Saved Group Revision Activity Log Entry
description: >-
- name: SavedGroupRevisionRef_model
x-displayName: Saved Group Revision Ref
description: >-
- name: SavedGroupRevisionReview_model
x-displayName: Saved Group Revision Review
description: >-
- name: ScheduleRule_model
x-displayName: Schedule Rule
description:
- name: ScheduledStopPlan_model
x-displayName: Scheduled Stop Plan
description:
- name: SdkConnection_model
x-displayName: Sdk Connection
description:
- name: Segment_model
x-displayName: Segment
description:
- name: Settings_model
x-displayName: Settings
description:
- name: Targeting Rule_model
x-displayName: Targeting Rule
description:
- name: Team_model
x-displayName: Team
description:
- name: VisualChange_model
x-displayName: Visual Change
description:
- name: VisualChangeset_model
x-displayName: Visual Changeset
description:
paths:
/v1/holdouts/{id}:
put:
tags:
- Holdouts
summary: Update a single holdout
description: >-
Updates a Holdout. Use the start, start-analysis, and stop endpoints to
move it through its lifecycle.
operationId: updateHoldout
parameters:
- name: id
in: path
required: true
description: ''
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
name:
type: string
minLength: 1
description:
type: string
maxLength: 10000
projects:
type: array
items:
type: string
owner:
description: >-
The userId or email address of the owner. If an email
address is provided, it will be used to look up the userId
of the matching organization member. If an ID is provided,
it will be validated as existing in the organization.
type: string
tags:
type: array
items:
type: string
archived:
type: boolean
skipAsDefaultHoldout:
description: >-
When true, this Holdout is not selected automatically when
creating Feature Flags or Experiments in Projects assigned
to the Holdout.
type: boolean
holdoutSize:
description: >-
Proportion of traffic placed in the holdout group (e.g. 0.05
for 5%). An equally sized comparison group is sampled from
the remaining traffic for measurement, so 2× this value
enters the holdout experiment in total. Must be greater than
0 and at most 0.5.
type: number
exclusiveMinimum: 0
maximum: 0.5
hashAttribute:
type: string
targetingCondition:
type: string
savedGroupTargeting:
type: array
items:
type: object
properties:
match:
type: string
enum:
- all
- none
- any
ids:
type: array
items:
type: string
required:
- match
- ids
additionalProperties: false
datasourceId:
type: string
assignmentQueryId:
type: string
goalMetrics:
type: array
items:
type: string
secondaryMetrics:
type: array
items:
type: string
statsEngine:
description: Statistics engine used to analyze this Holdout.
type: string
enum:
- bayesian
- frequentist
environments:
description: >-
Replaces the entire per-environment state. Environments not
listed are disabled.
type: object
propertyNames:
type: string
additionalProperties:
type: object
properties:
enabled:
description: Whether the Holdout is active in this environment.
type: boolean
required:
- enabled
additionalProperties: false
statusUpdateSchedule:
anyOf:
- description: >-
Automatic stage transitions for the Holdout. Dates must
be consecutive: `startAt` before `startAnalysisPeriodAt`
before `stopAt`. Send `null` to delete the schedule.
type: object
properties:
startAt:
description: >-
ISO datetime to move the Holdout from `draft` to
`running`. Must be in the future while the Holdout
is still a draft.
type: string
format: date-time
startAnalysisPeriodAt:
description: >-
ISO datetime to move the Holdout from `running` to
`analysis-period`. Requires `startAt` while the
Holdout is still a draft.
type: string
format: date-time
stopAt:
description: >-
ISO datetime to stop the Holdout. Requires
`startAnalysisPeriodAt` unless the analysis period
has already begun.
type: string
format: date-time
additionalProperties: false
- type: 'null'
additionalProperties: false
responses:
'200':
description: Resource updated
content:
application/json:
schema:
type: object
properties:
holdout:
$ref: '#/components/schemas/Holdout'
required:
- holdout
additionalProperties: false
x-codeSamples:
- lang: cURL
source: |-
curl -X PUT 'https://api.growthbook.io/api/v1/holdouts/{id}' \
-H 'Authorization: Bearer YOUR_API_KEY'
components:
schemas:
Holdout:
type: object
properties:
id:
type: string
dateCreated:
format: date-time
type: string
dateUpdated:
format: date-time
type: string
name:
type: string
description:
type: string
maxLength: 10000
projects:
description: >-
Project IDs this Holdout applies to. An empty array means All
Projects.
type: array
items:
type: string
owner:
description: The userId of the owner (or raw owner name/email for legacy records)
type: string
ownerEmail:
description: >-
The email address of the owner, when the owner can be resolved to a
known user.
type: string
tags:
type: array
items:
type: string
archived:
type: boolean
stage:
description: >-
Lifecycle stage of the Holdout. Use the start, start-analysis, and
stop endpoints to move through the lifecycle.
type: string
enum:
- draft
- running
- analysis-period
- stopped
trackingKey:
type: string
experimentId:
description: >-
ID of the companion experiment that stores this Holdout's analysis.
Use it with the experiment results endpoints (e.g. GET
/experiments/{experimentId}/results). Pass phase=0 for results
across the whole Holdout period, or phase=1 for results limited to
the analysis period.
type: string
skipAsDefaultHoldout:
description: >-
When true, this Holdout is not selected automatically when creating
Feature Flags or experiments in Projects assigned to the Holdout.
type: boolean
holdoutSize:
description: >-
Proportion of traffic placed in the holdout group (e.g. 0.05 for
5%). An equally sized comparison group is sampled from the remaining
traffic for measurement, so 2× this value enters the holdout
experiment in total. Must be greater than 0 and at most 0.5.
type: number
exclusiveMinimum: 0
maximum: 0.5
hashAttribute:
description: Attribute used to assign users to the Holdout.
type: string
targetingCondition:
description: Targeting condition as a JSON string.
type: string
savedGroupTargeting:
type: array
items:
type: object
properties:
match:
type: string
enum:
- all
- none
- any
ids:
type: array
items:
type: string
required:
- match
- ids
additionalProperties: false
datasourceId:
type: string
assignmentQueryId:
type: string
goalMetrics:
type: array
items:
type: string
secondaryMetrics:
type: array
items:
type: string
statsEngine:
description: Statistics engine used to analyze this Holdout.
type: string
enum:
- bayesian
- frequentist
variations:
type: array
items:
type: object
properties:
variationId:
type: string
key:
type: string
name:
type: string
description:
type: string
maxLength: 10000
required:
- variationId
- key
- name
additionalProperties: false
environments:
description: >-
Per-environment state, keyed by environment ID. Environments not
present are disabled.
type: object
propertyNames:
type: string
additionalProperties:
type: object
properties:
enabled:
description: Whether the Holdout is active in this environment.
type: boolean
required:
- enabled
additionalProperties: false
linkedFeatures:
description: >-
Feature Flags held out by this Holdout. Manage these through the
Feature Flag endpoints.
type: array
items:
type: object
properties:
id:
type: string
dateAdded:
format: date-time
type: string
required:
- id
- dateAdded
additionalProperties: false
linkedExperiments:
description: >-
Experiments held out by this Holdout. Manage these through the
experiment endpoints.
type: array
items:
type: object
properties:
id:
type: string
dateAdded:
format: date-time
type: string
required:
- id
- dateAdded
additionalProperties: false
dateStarted:
format: date-time
type: string
analysisStartDate:
description: When the Holdout entered its analysis period.
type: string
format: date-time
dateStopped:
format: date-time
type: string
statusUpdateSchedule:
anyOf:
- description: >-
Automatic stage transitions for the Holdout. Dates must be
consecutive: `startAt` before `startAnalysisPeriodAt` before
`stopAt`. Send `null` to delete the schedule.
type: object
properties:
startAt:
description: >-
ISO datetime to move the Holdout from `draft` to `running`.
Must be in the future while the Holdout is still a draft.
type: string
format: date-time
startAnalysisPeriodAt:
description: >-
ISO datetime to move the Holdout from `running` to
`analysis-period`. Requires `startAt` while the Holdout is
still a draft.
type: string
format: date-time
stopAt:
description: >-
ISO datetime to stop the Holdout. Requires
`startAnalysisPeriodAt` unless the analysis period has
already begun.
type: string
format: date-time
additionalProperties: false
- type: 'null'
nextScheduledStatusUpdate:
anyOf:
- description: The next stage transition that will run automatically.
type: object
properties:
type:
type: string
enum:
- start
- startAnalysisPeriod
- stop
date:
format: date-time
type: string
required:
- type
- date
additionalProperties: false
- type: 'null'
required:
- id
- dateCreated
- dateUpdated
- name
- description
- projects
- owner
- tags
- archived
- stage
- trackingKey
- experimentId
- skipAsDefaultHoldout
- holdoutSize
- hashAttribute
- targetingCondition
- datasourceId
- assignmentQueryId
- goalMetrics
- secondaryMetrics
- variations
- environments
- linkedFeatures
- linkedExperiments
additionalProperties: false
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: >
If using Bearer auth, pass the Secret Key as the token:
```bash
curl https://api.growthbook.io/api/v1/features -H "Authorization:
Bearer secret_abc123DEF456"
```
basicAuth:
type: http
scheme: basic
description: >
If using HTTP Basic auth, pass the Secret Key as the username and leave
the password blank:
```bash
curl https://api.growthbook.io/api/v1/features -u secret_abc123DEF456:
# The ":" at the end stops curl from asking for a password
```
````