Feature Flags Plugin

Feature flag service with targeting rules, user segments, and evaluation engine. Free, MIT licensed.

Install

nself plugin install feature-flags

What It Does

Enables toggling features per user, tenant, or custom segment without redeploying. Supports percentage rollouts, user targeting rules, and environment-specific flags. Evaluation happens server-side; the REST API serves flag decisions to your application.

Configuration

Env Var	Default	Description
FEATURE_FLAGS_PORT	3305	Feature flags service port
FEATURE_FLAGS_CACHE_TTL	60	Flag evaluation cache TTL (seconds)

Ports

Port	Purpose
3305	Feature flags REST API

Database Tables

2 tables added to your Postgres database:

• np_feature_flags_flags, flag definitions and targeting rules
• np_feature_flags_segments, user segment definitions

Nginx Routes

Route	Target
/feature-flags/	Feature flags API

API

GET  /health               — Health check
GET  /flags                — List all flags
POST /flags                — Create a flag
PUT  /flags/{key}          — Update flag rules
GET  /evaluate/{key}       — Evaluate flag for a user context
POST /evaluate/batch       — Evaluate multiple flags at once