Flagpost

Flagpost is an MCP server that provides intelligent feature flag management for Next.js applications, with a focus on A/B testing, user targeting, and percentage-based rollouts. It allows both server and client-side evaluation of feature flags, integrates tightly with TypeScript and React/Next.js, and supports advanced targeting based on user context and plan tiers. This tool is ideal for developers and product teams looking to control feature releases, run experiments, and gradually roll out updates or tests. It is part of the sathergate-toolkit, which includes additional tools for infrastructure, notifications, rate-limiting, and more.