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/play-billing-skills --skill revenuecat-api-quick-referencegit clone --depth 1 https://github.com/RevenueCat/play-billing-skillsWrote 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/play-billing-skills/revenuecat-api-quick-reference)<a href="https://agentmods.dev/skills/revenuecat/play-billing-skills/revenuecat-api-quick-reference"><img src="https://agentmods.dev/badge/skills/revenuecat/play-billing-skills/revenuecat-api-quick-reference/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/play-billing-skills/revenuecat-api-quick-reference"><img src="https://agentmods.dev/badge/skills/revenuecat/play-billing-skills/revenuecat-api-quick-reference.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00052 | $0.02538 |
| Opus 5.5 | $0.00021 | $0.01015 |
| Sonnet 5.5 | $0.00010 | $0.00508 |
| Haiku 4.5 | $0.00005 | $0.00254 |
Grade A, and why
revenuecat-api-quick-reference 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 11d 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.
This is a copy
89% identical to rc-revenuecat-api-quick-reference — 34 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RevenueCat API Quick Reference
Phase 0: Intent
Use this skill when you need a fast lookup of a RevenueCat API surface while writing Android code or server logic. Typical questions you answer from here:
- Which builder option controls a given
Purchases.configurebehavior? - What is the return type and signature of
awaitPurchase,awaitOfferings,awaitCustomerInfo,awaitRestore,awaitLogIn,awaitLogOut? - How do I read offering, package, product, entitlement fields?
- Which
PurchasesErrorCodeshould I branch on? - Which listener callback do I register for customer info updates?
Do not use this skill as a deep tutorial. Reach for the feature-specific skills (purchase flow, configuring the SDK, error handling, subscription states) when you need step-by-step guidance or design rationale.
Phase 1: Locate
Decide SDK surface vs REST surface before you search the tables.
Route to the SDK (client side, Android app code):
- Code runs inside the Android app, in an
Activity,ViewModel, or background worker bundled with your app. - You need to launch a purchase, restore purchases, read cached
CustomerInfo, fetchOfferings, identify or log out a user, or listen for updates. - You want entitlement gating in the UI.
Route to the REST API (server side):
- Code runs on your backend, in a webhook handler, in an admin tool, or in a scheduled job.
- You need to grant or revoke a promotional entitlement, override a subscription, look up a subscriber from another service, refund, or deliver events to another system.
- You are integrating with a system that cannot embed the SDK.
The tables in this skill cover the Android SDK 10.x surface from appendix A verbatim, plus a short REST endpoint index. For full REST paths, authentication, and payloads, see the full appendix on revenuecat.com together with the backend and webhooks skills, and treat this file as the SDK index.
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.
- 11d ago Changed · +16 lines f9e3e488b0f0
- 1mo ago First seen · 291 lines · 52 tokens per session scan A 032a13f4c47a
revenuecat-api-quick-reference is a skill published in the GitHub repository RevenueCat/play-billing-skills (58 stars, last pushed 12d ago), licensed Apache-2.0. It adds 52 tokens to every session and 2,538 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to rc-revenuecat-api-quick-reference, differing in 34 lines, and is treated as a copy.
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).
gplay-iap-setup
In-app products, subscriptions, base plans, and offers setup for Google Play monetization, including bulk-localizing subscription display names, descriptions, and benefits across all locales. Use when configuring in-app purchases or subscription products.
rc-revenuecat-api-quick-reference
Use this skill as a quick reference for the RevenueCat Android SDK 10.x and REST API. Covers SDK init, common Purchases calls, CustomerInfo / Offerings access patterns, and the most used REST endpoints.