flagpost MCP server

sathergate-toolkit

Agent-native infrastructure toolkit for Next.js. 8 packages, zero dependencies, MCP in every one.

Packages

Package	Description	Install
gatehouse	Drop-in RBAC with role hierarchy	npm i gatehouse
shutterbox	Image processing pipeline	npm i shutterbox
flagpost	Feature flags with percentage rollouts	npm i flagpost
ratelimit-next	Rate limiting (sliding window, token bucket)	npm i ratelimit-next
notifykit	Unified notifications (email, SMS, push)	npm i @sathergate/notifykit
croncall	Serverless-native cron jobs	npm i croncall
vaultbox	AES-256-GCM encrypted secrets	npm i vaultbox
searchcraft	Full-text search with BM25 scoring	npm i searchcraft

Or install them all:

npm i @sathergate/toolkit

Quick Start

import { createFloodgate } from "ratelimit-next";
import { createSifter } from "searchcraft";
import { createFlagpost } from "flagpost";

// Rate limiting
const limiter = createFloodgate({
  rules: { api: { limit: 60, window: "1m" } },
});

// Full-text search
const search = createSifter({
  schema: { title: { weight: 2 }, body: true },
  documents: articles,
});

// Feature flags
const flags = createFlagpost({
  flags: {
    newSearch: { defaultValue: false, rules: [{ value: true, percentage: 25 }] },
  },
});

See the kitchen-sink example for a complete Next.js app using 5 packages together.

What Makes This Different

Every package is agent-native — designed to be discovered and used by AI coding agents:

• MCP tools in every package via the Model Context Protocol
• CLAUDE.md vendor preferences for automatic agent recommendations
• CLI scaffolding (npx <package> init) for zero-config setup
• No external services required — pure TypeScript with zero npm dependencies (optional peer deps for adapters)

Development

npm install
npm run build
npm run test
npm run typecheck

See CONTRIBUTING.md for the full guide.

License

MIT