# Unleash Client API

**Canonical:** https://apis.io/apis/unleash/client-api/  
**Provider:** Unleash — https://apis.io/providers/unleash/  
**Base URL:** https://app.unleash-instance.example.com  
**Documentation:** https://docs.getunleash.io/api#client-api

Unleash Client API is one of 36 APIs that [Unleash](https://apis.io/providers/unleash/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Clients, SDK, and Feature Flags. The published artifact set on APIs.io includes API documentation and an OpenAPI specification.

API endpoint consumed by backend Unleash SDKs to fetch complete feature flag configurations including all activation strategies. Supports server-side flag evaluation with zero additional latency after initial bootstrap. Requires a backend API token scoped to a project and environment.

## Machine-readable artifacts (3)

- **Documentation** — https://docs.getunleash.io/api
- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/unleash/refs/heads/main/openapi/unleash-client-api-openapi.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/unleash/refs/heads/main/apis.yml

## Other Unleash APIs (12)

- [Unleash Addons API](https://apis.io/apis/unleash/unleash-addons-api/)
- [Unleash Admin UI API](https://apis.io/apis/unleash/unleash-admin-ui-api/)
- [Unleash API tokens API](https://apis.io/apis/unleash/unleash-api-tokens-api/)
- [Unleash Archive API](https://apis.io/apis/unleash/unleash-archive-api/)
- [Unleash Auth API](https://apis.io/apis/unleash/unleash-auth-api/)
- [Unleash Banners API](https://apis.io/apis/unleash/unleash-banners-api/)
- [Unleash Change Requests API](https://apis.io/apis/unleash/unleash-change-requests-api/)
- [Unleash Context API](https://apis.io/apis/unleash/unleash-context-api/)
- [Unleash Dependencies API](https://apis.io/apis/unleash/unleash-dependencies-api/)
- [Unleash Environments API](https://apis.io/apis/unleash/unleash-environments-api/)
- [Unleash Events API](https://apis.io/apis/unleash/unleash-events-api/)
- [Unleash Feature Types API](https://apis.io/apis/unleash/unleash-feature-types-api/)

## Tags

Clients, SDK, Feature Flags

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/unleash/client-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/unleash/.