What is revenuecat-identify-user?

A coding guide for linking RevenueCat, a service for managing in-app subscriptions, with an app’s login system. It covers identifying users, logging them out, and switching between accounts on supported mobile platforms.

Use it to implement RevenueCat login and logout, assign an app user ID, and move users from anonymous to identified accounts in iOS, Android, Kotlin Multiplatform, Flutter, or React Native apps.

It keeps the app’s users matched with the correct RevenueCat subscriber records when they log in, log out, or change accounts.

revenuecat-identify-user — Skill for Claude Code by RevenueCat

Install

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.

Any agent

npx skills add RevenueCat/ai-toolkit --skill revenuecat-identify-user

Clone the repo

git clone --depth 1 https://github.com/RevenueCat/ai-toolkit

Made for: Claude Code.

Or install revenuecat, the plugin that ships this one along with the rest of its 18 skills, 1 MCP server.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/revenuecat/ai-toolkit/revenuecat-identify-user/github.svg)](https://agentmods.dev/skills/revenuecat/ai-toolkit/revenuecat-identify-user)

Your own site

<a href="https://agentmods.dev/skills/revenuecat/ai-toolkit/revenuecat-identify-user"><img src="https://agentmods.dev/badge/skills/revenuecat/ai-toolkit/revenuecat-identify-user/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/revenuecat/ai-toolkit/revenuecat-identify-user"><img src="https://agentmods.dev/badge/skills/revenuecat/ai-toolkit/revenuecat-identify-user.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,141 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

Socket pass 8 May 2026
Snyk pass 8 May 2026
NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

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	$0.00084	$0.01141
Opus 5	$0.00042	$0.00571
Sonnet 5	$0.00017	$0.00228
Haiku 4.5	$0.00008	$0.00114

Measured 12d ago against content hash 7edd61e51569, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

revenuecat-identify-user 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 12d 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.

revenuecat/skills/revenuecat-identify-user/SKILL.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

revenuecat-identify-user: connect RevenueCat to your auth system

Use this skill when the user wants to call logIn / logOut on the RevenueCat SDK so that their app users line up with RevenueCat subscribers. This skill does not cover initial SDK setup (see integrate-revenuecat), purchases (revenuecat-purchase-flow), or gating (revenuecat-entitlements-gate).

1. Detect the platform

Inspect the working directory and pick the first match, from top to bottom:

React Native: package.json has a react-native-purchases entry, or react-native as a dependency → read platforms/react-native.md. If expo is also a dependency, note it as an Expo project.
Flutter: pubspec.yaml exists at the project root → read platforms/flutter.md.
Kotlin Multiplatform: build.gradle.kts contains a kotlin { … } multiplatform source sets block, or depends on com.revenuecat.purchases:purchases-kmp* → read platforms/kmp.md.
Android (native): build.gradle(.kts) applies com.android.application (and is not KMP) → read platforms/android.md.
iOS (native): Package.swift, *.xcodeproj, *.xcworkspace, or Podfile at the project root → read platforms/ios.md.

If several match (e.g. an ios/ folder inside a Flutter project), pick the outermost project, the one that owns the build. If still ambiguous, ask the user which platform they want to configure.

2. Shared concepts (all platforms)

Anonymous by default. Before logIn is called, RevenueCat assigns a stable anonymous ID prefixed $RCAnonymousID:. Purchases made while anonymous are aliased onto the real appUserID the first time logIn is called with it, so there is no "lost purchase" risk from letting users buy before signing in.
Never use email, phone number, or a sequential database id as the appUserID. Use a stable opaque value such as your backend's user UUID, or a hash of the user id. RevenueCat treats the ID as an opaque string and it is difficult to change later.
Call logIn after your auth system confirms the session. Do not call logIn speculatively. The typical trigger is your auth state listener firing with a signed in user. logIn returns both the user's current CustomerInfo and a created: Boolean that tells you whether this is a brand new RevenueCat customer.
logOut only works on identified users. Calling logOut while the SDK is on an anonymous ID throws an error in every SDK (PurchasesErrorCode.LogOutWithAnonymousUserError or the iOS equivalent). Gate it behind your own "is signed in" flag.
Restore is not login. restorePurchases() asks the store for the current receipt and attaches it to the current RevenueCat user. It does not switch identities. If the user signs in on a new device, call logIn(appUserID) first, then restorePurchases() only if they also expect to pull a receipt from the current store account.
Account switching is logOut then logIn. If your app lets a user sign out and sign back in as someone else, call logOut() first, wait for it, then logIn(newId). Do not try to swap directly with a second logIn, since that will alias the two IDs together.
Configure first. Purchases.configure(…) must have run before logIn / logOut. If it has not, the SDK throws.

Read the full file on GitHub · 52 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

12d ago First seen · 52 lines · 84 tokens per session scan A 7edd61e51569

Subscribe to this mod's changes

revenuecat-identify-user is a skill published in the GitHub repository RevenueCat/ai-toolkit (65 stars, last pushed 10d ago), licensed MIT. It adds 84 tokens to every session and 1,141 once invoked, about $0.0004 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.

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