Introduction
CashSDK is the in-app purchase & paywall platform built for coding agents. Integrate your IAP stack end to end in under an hour, on CashSDK Cloud.
CashSDK gives you everything you need to sell subscriptions and in-app purchases — drop-in SDKs, server-side receipt validation, remote paywalls, and revenue analytics — integrated end to end in under an hour on CashSDK Cloud.
Validate your first purchase in an afternoon.
iOS, Android, React Native, Flutter, and Web.
MCP server, Cursor, Claude Code, and Codex.
Every endpoint, event, and webhook.
What CashSDK does#
Server-side receipt validation
Every Apple and Google receipt is verified server-side, with signature checks, replay protection, and fraud signals — before you unlock anything.
Remote paywalls
Design paywalls in the dashboard and update pricing, copy, and layout over the air. Run experiments and roll out winners without an app release.
Subscriptions & entitlements
Trials, intro offers, upgrades, downgrades, and refunds — modeled correctly, with one reliable answer to "what can this user access?"
Revenue analytics
MRR, LTV, trial conversion, churn, and cohort retention — computed from your raw purchase events and reconciled against the stores.
Why CashSDK#
CashSDK is the in-app purchase & paywall platform built for coding agents — integrated end to end in under an hour on CashSDK Cloud, with no infrastructure to run. Your revenue data stays yours: one-click full export on every plan, and your data is never sold or shared. Pricing is simple — free up to $5,000/mo in tracked revenue, then 1%, capped at $999/mo.
Get started at app.cashsdk.com and validate your first purchase in an afternoon.
How it fits together#
Drop the CashSDK SDK into your app and configure it with a publishable key.
Define products, entitlements, and offerings in the dashboard (or via the API, CLI, or MCP server).
Fetch offerings at runtime and present a paywall. Purchases flow through the native store.
Every purchase is validated server-side and synced across devices. Ask CashSDK whether a user is entitled and get one answer.
Ready? Head to the Quickstart.