Unleash
Unleash is the open-source feature management platform enabling progressive delivery, A/B testing, and canary releases through feature flags (feature toggles). Teams use Unleash to decouple code deployments from feature releases, control rollouts by user segment, run experiments with variants, and maintain kill switches for rapid incident response. Available as open-source (self-hosted) and as Unleash Cloud (managed).
Unleash publishes 36 APIs on the APIs.io network, including Client API, Addons API, Admin UI API, and 33 more. Tagged areas include Feature Flags, Feature Management, Progressive Delivery, A/B Testing, and Open Source.
The Unleash catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.
Unleash’s developer surface includes authentication, documentation, GitHub presence, pricing, engineering blog, changelog, and 9 more developer resources.
Kin Score
APIs 36
Individual APIs this provider publishes, each with its own machine-readable definition.
Unleash Client API
API endpoint consumed by backend Unleash SDKs to fetch complete feature flag configurations including all activation strategies. Supports server-side flag evaluation with zero a...
Unleash Addons API
Create, update, and delete [Unleash addons](https://docs.getunleash.io/addons).
Unleash Admin UI API
Configuration for the Unleash Admin UI. These endpoints should not be relied upon and can change at any point without prior notice.
Unleash API tokens API
Create, update, and delete [Unleash API tokens](https://docs.getunleash.io/concepts/api-tokens-and-client-keys).
Unleash Archive API
Revive or permanently delete [archived feature flags](https://docs.getunleash.io/advanced/archived_toggles).
Unleash Auth API
Manage logins, passwords, etc.
Unleash Banners API
Create, update, flag, and delete [banners](https://docs.getunleash.io/concepts/banners).
Unleash Change Requests API
API for managing [change requests](https://docs.getunleash.io/concepts/change-requests).
Unleash Context API
Create, update, and delete [context fields](https://docs.getunleash.io/concepts/unleash-context) that Unleash is aware of.
Unleash Dependencies API
Manage feature dependencies.
Unleash Environments API
Create, update, delete, enable or disable [environments](https://docs.getunleash.io/concepts/environments) for this Unleash instance.
Unleash Events API
Read events from this Unleash instance.
Unleash Feature Types API
Manage [feature flag types](https://docs.getunleash.io/concepts/feature-flags#feature-flag-types).
Unleash Features API
Create, update, and delete [feature flags](https://docs.getunleash.io/concepts/feature-flags).
Unleash Frontend API API
The [Frontend API](https://docs.getunleash.io/concepts/front-end-api) is used for connecting client-side (frontend) applications to Unleash.
Unleash Import/Export API
[Import and export](https://docs.getunleash.io/concepts/import-export) the state of your Unleash instance.
Unleash Instance Admin API
Instance admin endpoints used to manage the Unleash instance itself.
Unleash Maintenance API
Enable/disable the maintenance mode of Unleash.
Unleash Metrics API
Register, read, or delete metrics recorded by Unleash.
Unleash Notifications API
API for managing [notifications](https://docs.getunleash.io/concepts/notifications).
Unleash Operational API
Endpoints related to the operational status of this Unleash instance.
Unleash Personal access tokens API
Create, update, and delete [Personal access tokens](https://docs.getunleash.io/concepts/api-tokens-and-client-keys#personal-access-tokens).
Unleash Playground API
Evaluate an Unleash context against your feature flags.
Unleash Projects API
Create, update, and delete [Unleash projects](https://docs.getunleash.io/concepts/projects).
Unleash Public signup tokens API
Create, update, and delete [Unleash Public Signup tokens](https://docs.getunleash.io/concepts/public-signup-tokens).
Unleash Release Templates API
API for managing [release templates](https://docs.getunleash.io/concepts/release-templates).
Unleash Search API
Search for features.
Unleash Segments API
Create, update, delete, and manage [segments](https://docs.getunleash.io/concepts/segments).
Unleash Service Accounts API
Endpoints for managing [Service Accounts](https://docs.getunleash.io/concepts/service-accounts), which enable programmatic access to the Unleash API.
Unleash Strategies API
Create, update, delete, manage [custom strategies](https://docs.getunleash.io/concepts/activation-strategies#custom-strategies).
Unleash Tags API
Create, update, and delete [tags and tag types](https://docs.getunleash.io/concepts/feature-flags#tags).
Unleash Telemetry API
API for information about telemetry collection
Unleash Unknown Flags API
Endpoints related to unknown flags.
Unleash Unleash Edge API
Endpoints related to [Unleash Edge](https://docs.getunleash.io/unleash-edge).
Unleash Unstable API
Experimental endpoints that may change or disappear at any time.
Unleash Users API
Manage users and passwords.
Scroll for all 36
Open Collections 3
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Unleash Admin API
OPEN COLLECTIONUnleash Client API
OPEN COLLECTIONUnleash Frontend API
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Unleash Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Unleash Finops
FINOPSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Unleash Context
JSON-LDSpectral Rules 2
Spectral governance rulesets for linting and validating these APIs.
Unleash API Rules
SPECTRALUnleash API Rules
SPECTRALJSON Schema 1
Standalone JSON Schema definitions for this provider's data models.
Unleash Feature Flag
JSON SCHEMAJSON Structure 1
JSON Structure definitions describing this provider's data shapes.
Unleash Feature Flag Structure
JSON STRUCTUREExamples 3
Example request and response payloads for these APIs.
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API