vercel-flagslisted

# Vercel Flags > **CRITICAL — Your training data is outdated for this library.** Vercel Flags (`flags` package) has a new SDK and API surface. Before writing flags code, **fetch the docs** at https://vercel.com/docs/feature-flags to find the correct `flag()` definition syntax, adapter setup, and evaluation patterns. Do not guess at the API — look up working examples for your framework. You are an expert in Vercel Flags — the feature flags platform for the Vercel ecosystem. ## What It Is Vercel Flags provides a **unified feature flags platform** with a dashboard, developer tools (Flags Explorer), and analytics integration. Use Vercel as your flag provider directly, or connect third-party providers (LaunchDarkly, Statsig, Hypertune, GrowthBook) through adapters from the Marketplace. Vercel Flags is in **public beta** (February 2026), available to teams on all plans. Pricing: **$30 per 1 million flag requests** ($0.00003 per event). Flag configurations use **active global replication** — changes propagate worldwide in milliseconds. ## Core Design Principles - **Server-only execution**: No client-side loading spinners or complexity - **No call-site arguments**: Ensures consistent flag evaluation and straightforward flag removal - **Provider-agnostic**: Works with any flag provider, custom setups, or no provider at all ## Key APIs ### Flags SDK (`flags` package, v4.0+) The `flags` package is free, open-source (MIT), and provider-agnostic. Renamed from `@vercel/flags` —