Verify purchases server-side, in minutes.

Create a project & grab your API key

Sign in and create a project — name it and pick your platform. You'll get a server-side API key. It stays on your backend / in your agent's MCP config; it's never shipped in the app.

Build your paywall

Design packages, pricing, and copy in the visual builder with a live phone preview. The config is saved server-side and fetched via the API at runtime — change it later without an app release.

Connect the MCP server to your agent

Point Claude Code, Codex, or Cursor at the Tierux MCP server — sign in with OAuth when prompted, no API key needed. Then describe what you want — the agent maps your store products, configures your paywall, and returns a preview to approve before anything is saved. Full setup steps for every client: docs-mcp-setup.

// .mcp.json
{
  "mcpServers": {
    "tierux": {
      "url": "https://mcp-tierux.web.app"
    }
  }
}

▸ "Set up a $9.99 Pro monthly subscription."

create_project(name: "My App") // returns app_xxx after confirmation
setup_google_play(appId: "app_xxx")
create_play_product(productId: "pro_monthly", billingPeriod: "P1M",
  price: "9.99", currency: "USD", appId: "app_xxx")
create_product_mapping(productId: "pro_monthly", entitlementId: "pro",
  productType: "subscription", appId: "app_xxx")

app_xxx is the public app ID returned by create_project (also shown in the dashboard). Pass it to subsequent MCP calls and to SDK initialization.

Your products and paywall are now configured server-side. Integrate from your app over the REST API (below) — or drop in the native Android SDK:

// settings.gradle.kts — add the Tierux Maven repo
dependencyResolutionManagement { repositories {
  maven { url = uri("https://maven-tierux.web.app") }
} }

// app/build.gradle.kts
implementation("com.tierux:android-sdk:0.2.0")

// in your app — app_xxx comes from create_project or the dashboard
Tierux.init(context, appId = "app_xxx", baseUrl = "https://tierux.com/")
Tierux.showPaywall(activity, paywallId = "pro") { result ->
  when (result) {
    is PaywallResult.Purchased -> if (result.active) unlockPro()
    PaywallResult.Cancelled -> Unit
    is PaywallResult.Error -> showError(result.error)
    is PaywallResult.WinbackAccepted -> unlockPro()
  }
}

The Android Maven registry is live at https://maven-tierux.web.app. You can also download the Android SDK source for local integration (no API key needed).

iOS SDK source — browse or download the full Swift source (no API key needed). Extract and reference locally with SPM (.package(path: "Tierux")) or use the REST API directly.

React Native, Flutter, and the TypeScript backend SDK aren't on the public registries yet either — grab the source directly: react-native, flutter, typescript.

Verify a purchase

Send a real purchase token to the verify endpoint (below). Tierux verifies it with the store and normalizes it into queryable entitlement state, with the verification showing live in your dashboard. Raw purchase tokens are never stored.

Verify a purchase

After a user buys in your app, send the store's purchase token to Tierux. It verifies with Google Play (or Apple), then normalizes the result into entitlement state. Raw tokens are never stored.

curl -X POST https://tierux.com/api/v1/purchases/google-play/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "appId": "app_123",
    "userId": "user_abc",
    "packageName": "com.yourco.app",
    "productId": "pro_monthly",
    "purchaseToken": "token-from-google-play-billing"
  }'

// 200 OK
{
  "ok": true,
  "userId": "user_abc",
  "entitlement": "pro",
  "active": true,
  "expiresAt": "2026-07-25T00:00:00.000Z",
  "status": "active"
}

On iOS, post the StoreKit 2 JWS to /api/v1/purchases/apple/verify with transactionId and jwsRepresentation instead of packageName / purchaseToken.

Check an entitlement

Gate a feature from your backend by reading the user's current entitlement state. active reflects renewals, expiry, and cancellations kept in sync by store notifications.

curl https://tierux.com/api/v1/entitlements/user_abc/pro \
  -H "Authorization: Bearer YOUR_API_KEY"

// 200 OK
{
  "userId": "user_abc",
  "entitlement": "pro",
  "active": true,
  "expiresAt": "2026-07-25T00:00:00.000Z",
  "status": "active",
  "winbackPending": false
}