Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add RevenueCat/ai-toolkit --skill rc-purchase-flowgit clone --depth 1 https://github.com/RevenueCat/ai-toolkitWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/revenuecat/ai-toolkit/rc-purchase-flow)<a href="https://agentmods.dev/skills/revenuecat/ai-toolkit/rc-purchase-flow"><img src="https://agentmods.dev/badge/skills/revenuecat/ai-toolkit/rc-purchase-flow/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/revenuecat/ai-toolkit/rc-purchase-flow"><img src="https://agentmods.dev/badge/skills/revenuecat/ai-toolkit/rc-purchase-flow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00051 | $0.01299 |
| Opus 5 | $0.00026 | $0.00649 |
| Sonnet 5 | $0.00010 | $0.00260 |
| Haiku 4.5 | $0.00005 | $0.00130 |
Grade A, and why
rc-purchase-flow scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purchase Flow
A RevenueCat purchase on Android is two lines of code. The SDK handles the billing params, the Play sheet, the purchase token round trip, server side verification, and acknowledgment. You decide which package to pass in and what to do with the returned entitlements.
Phase 1: Understand what awaitPurchase() does
One call to Purchases.sharedInstance.awaitPurchase(params) runs six steps under the hood. You do not write any of this.
| Step | What happens |
|---|---|
| 1 | Builds BillingFlowParams with the correct ProductDetailsParams from your Package |
| 2 | Calls BillingClient.launchBillingFlow() against the activity you passed |
| 3 | Suspends until the PurchasesUpdatedListener result arrives |
| 4 | If OK, posts the Play purchase token to the RevenueCat backend |
| 5 | Backend verifies via purchases.subscriptionsv2.get or purchases.products.get |
| 6 | SDK acknowledges (subs or non-consumables) or consumes (consumables) within the 3 day Google window |
The call returns PurchaseResult(storeTransaction, customerInfo). Retriable failures are retried automatically.
See the Purchase Flow chapter on revenuecat.com for the six-step diagram and the full picture.
Phase 2: Prepare the package
You need a Package from offerings before you can purchase. Fetch offerings, let your UI pick one, and hold the activity.
val offerings = Purchases.sharedInstance.awaitOfferings()
val pkg = offerings.current?.monthly ?: return
If you need a specific offer instead of the default, resolve a SubscriptionOption and pass that to PurchaseParams.Builder instead of the package.
val option = pkg.product.subscriptionOptions
?.firstOrNull { it.tags.contains("promo_50_off") }
?: pkg.product.defaultOption
?: return
For EU personalized pricing, chain .isPersonalizedPrice(true) on the builder so Play shows the customized price notice.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 132 lines · 51 tokens per session scan A 400cb8d23056
rc-purchase-flow is a skill published in the GitHub repository RevenueCat/ai-toolkit (65 stars, last pushed 8d ago), licensed MIT. It adds 51 tokens to every session and 1,299 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
play-billing-library-version-upgrade
Use this skill when upgrading or migrating an Android project from any legacy Google Play Billing Library (PBL) version to the latest stable version of PBL.
asc-revenuecat-catalog-sync
Reconcile App Store Connect subscriptions and in-app purchases with RevenueCat products, entitlements, offerings, and packages using asc and RevenueCat MCP. Use when setting up or syncing subscription catalogs across ASC and RevenueCat.
axiom-implement-iap
Use when the user wants to add in-app purchases, implement StoreKit 2, or set up subscriptions.
google-play
Google Play Developer API (Android Publisher) integration with managed OAuth. Manage apps, subscriptions, in-app purchases, and reviews. Use this skill when users want to interact with Google Play Console programmatically. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).
subscription-lifecycle
Generates StoreKit 2 subscription lifecycle management — grace periods, billing retry, offer codes, win-back offers, upgrade/downgrade paths, and subscription status monitoring. Use when user needs post-purchase subscription state handling beyond the initial paywall.
subscription-offers
Generates StoreKit 2 code for all subscription offer types — introductory, promotional, offer codes, and win-back. Includes eligibility checks, offer presentation, and the preferredSubscriptionOffer modifier. Use when adding subscription offers, free trials, or promotional pricing.