unleash.unleash/website/docs/reference/api/legacy/unleash/index.md

id	title
index	Legacy API Documentation

:::caution

The docs in this category are legacy documentation. You should prefer to use the Unleash OpenAPI docs instead whenever possible.

:::

Client API

This describes the API provided to unleash-clients.

Since v4.0.0 all operations require an API token with Client level access.

With versions earlier than v4.0.0 and insecure authentication no authentication is required.

• Feature Flags API
• Register API
• Metrics API

Admin API (internal)

The internal API used by the Admin UI (unleash-frontend). Since v4.0.0 all operations require an API token with Admin level access:

With versions earlier than v4.0.0 and insecure authentication Basic Auth (with curl -u myemail@test.com:) is enough.

• Events API
• Feature Flags API
• Metrics API
• Project API
• Strategies API
• Tags API

System API's

• Internal Backstage Prometheus API

Content-Type

All endpoints require application/json as content type, so if you're using curl remember to add

-H "Content-Type: application/json"