tiun
Unified backend for AI and SaaS companies combining authentication, payments, customer database, and analytics in one MCP-installable system.
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Product Overview
What is tiun?
tiun is a commercial backend built specifically for AI and SaaS builders who want to skip stitching together separate vendors for login, billing, and data tracking. Instead of running Auth0 for sign-in, Stripe for payments, and a third tool for analytics, tiun bundles authentication, subscription and usage-based billing, a shared customer database, and product analytics into one connected system with a single SDK. It also acts as Merchant of Record, taking on global tax compliance, invoicing, and chargeback handling on the seller's behalf. What sets tiun apart is its agent-first setup: developers install it through skills and an MCP server, letting an AI coding agent like Cursor or Claude Code wire up the entire backend directly into a codebase in minutes rather than following a manual integration guide.
Key Features
Drop-in Authentication
Ready-made sign-up, login, logout, multifactor auth via SMS and email, and social SSO, plus a user profile component for account management.
Merchant of Record Billing
Supports one-time payments, subscriptions, and usage-based billing while tiun handles tax collection, remittance, and chargebacks as the legal seller.
Unified Customer Database
Keeps subscription status, transactions, and session activity synced to a single user profile, removing the need for manual data syncing between tools.
AI-Native Setup via MCP
Exposes an MCP server and installable skills so AI coding agents can read the API and configure auth, billing, and entitlements without manual wiring.
Pre-built Checkout Overlays
Embeddable checkout, login, and paywall components keep users on the host page instead of redirecting to an external payment flow.
Product Analytics
Tracks logins, purchases, and feature usage at the profile level, giving teams one queryable view of how customers move through the product.
Use Cases
- Solo Founders Launching Fast : Indie builders can ship a monetized product in a day by letting an AI agent install auth and billing instead of coding a backend from scratch.
- Global SaaS Selling : Companies selling internationally use tiun's Merchant of Record coverage to handle VAT, GST, and card network compliance without a separate tax vendor.
- AI Product Monetization : AI-native apps adopt usage-based billing to charge per API call or token consumption while keeping entitlements in sync with user access.
- Replacing a Multi-Vendor Stack : Teams running Stripe, Auth0, and a separate analytics tool consolidate onto tiun to cut integration overhead and reduce recurring vendor fees.
- Static Site Monetization : Since checkout and access control run client-side, static sites can offer paid subscriptions or one-time purchases without a custom backend.
FAQs
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