capacitor-in-app-purchases: Design & UI for AI Agents | OpenAgentSkill

Overview

Guides the agent through setting up in-app purchases in Capacitor apps. Covers App Store Connect and Google Play Console product configuration, plugin selection (Capawesome Purchases vs. RevenueCat), plugin installation and platform setup, purchase flows for subscriptions and consumables, receipt validation, restore purchases, handling unfinished transactions, and testing with sandbox and StoreKit environments. Do not use for non-Capacitor mobile frameworks, Stripe payment processing, or physical goods checkout.

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Capacitor In-App Purchases

Set up in-app purchases and subscriptions in Capacitor apps, covering store configuration, plugin integration, purchase flows, receipt validation, and testing.

Prerequisites

Capacitor 6, 7, or 8 app (Capawesome Purchases requires Capacitor 8+; RevenueCat requires Capacitor 8+).
Node.js and npm installed.
For iOS: A paid Apple Developer Program membership, Xcode installed, and an app created in App Store Connect.
For Android: A Google Play Developer account, Android Studio installed, and an app created in Google Play Console.

Agent Behavior

Guide step-by-step. Walk the user through the process one step at a time. Never present multiple unrelated questions at once.
Auto-detect before asking. Check the project for platforms (android/, ios/), package.json dependencies, and Capacitor version. Only ask the user when something cannot be detected.
One decision at a time. When a step requires user input, ask that single question, wait for the answer, then continue.
Present clear options. Provide concrete choices (e.g., "Which purchases plugin do you want to use? (1) Capawesome Purchases (2) RevenueCat") instead of open-ended questions.

MCP Server

The Capawesome MCP server serves the current Capawesome documentation, so it is always ahead of the guidance bundled with this skill.

If the Capawesome MCP tools are available, call search_docs for the topic and read the matching page with get_doc_page before applying the guidance below. Where the two disagree, follow the documentation.
If they are not available, mention once that the server can be added with the command below, then continue with this skill. Never block on it.

claude mcp add --transport http capawesome "https://mcp.capawesome.io/mcp"

The documentation tools need no account and no token. See the capawesome-mcp skill for full setup, including the Capawesome Cloud tools.

Procedures

Step 1: Analyze the Project

Auto-detect the following by reading project files — do not ask the user for information that can be inferred:

Platforms: Check which directories exist (android/, ios/). These are the platforms to configure.
Capacitor version: Read @capacitor/core version from package.json.
Existing purchases plugins: Check if @capawesome-team/capacitor-purchases, @revenuecat/purchases-capacitor, or any other in-app purchase plugin is already in package.json. If found, inform the user and ask whether to continue with the existing plugin or switch.

Step 2: Configure Products in App Store Connect (iOS)

Skip if ios/ does not exist.

Read references/app-store-connect-setup.md and guide the user through creating in-app purchase products and subscriptions in App Store Connect. This covers:

Accepting required developer agreements
Verifying business configuration (Paid Apps Agreement, bank account, tax forms)
Creating in-app purchase products (consumables, non-consumables, subscriptions)
Subscription group setup
Product status requirements

Step 3: Configure Products in Google Play Console (Android)

Skip if android/ does not exist.

Read references/google-play-console-setup.md and guide the user through creating in-app purchase products in Google Play Console. This covers:

Completing compliance and metadata requirements
Creating in-app products and subscriptions
Configuring pricing and tax settings
Activating products

Step 4: Choose a Purchases Plugin

Ask the user which plugin to use:

Capawesome Purchases (@capawesome-team/capacitor-purchases) — Lightweight, no third-party backend dependency. Requires a Capawesome Insiders license. Server-side receipt validation is the developer's responsibility.
RevenueCat (@revenuecat/purchases-capacitor) — Full backend service with server-side receipt validation, entitlement management, analytics, and integrations. Requires a RevenueCat account.

Default recommendation: Capawesome Purchases for apps that already have a backend for receipt validation or want to avoid third-party dependencies. RevenueCat for apps that want managed receipt validation and subscription analytics out of the box.

Step 5: Install and Configure the Plugin

Based on the user's choice in Step 4:

Capawesome Purchases: Read references/capawesome-purchases-setup.md and follow the installation and platform configuration steps.
RevenueCat: Read references/revenuecat-setup.md and follow the installation and platform configuration steps.

Step 6: Implement Purchase Flows

Based on the user's plugin choice:

Capawesome Purchases: Read references/capawesome-purchases-implementation.md and add the purchase code to the project.
RevenueCat: Read references/revenuecat-implementation.md and add the purchase code to the project.

Adapt imports and code structure to match the user's framework (Angular, React, Vue, etc.).

The implementation covers:

Fetching product details
Purchasing a product
Finishing transactions (Capawesome) or checking entitlements (RevenueCat)
Restoring purchases
Handling unfinished transactions on app startup
Receipt validation strategy

Step 7: Configure Optional Features

Ask the user which optional features to enable:

Subscription management — Display subscription status, handle renewals and expirations.
Introductory offer eligibility — Check if a user qualifies for introductory pricing (Capawesome Purchases only).
Server notifications — Set up App Store Server Notifications and/or Google Play Real-time Developer Notifications for subscription lifecycle events.

For each selected feature, read the corresponding implementation reference file and apply the relevant code.

Step 8: Test Purchases

Read references/testing.md and guide the user through testing in-app purchases on both platforms. This covers:

iOS Sandbox testing with test accounts
iOS StoreKit Testing in Xcode
Android testing with Google Play Console internal track and license testing accounts
Common testing pitfalls and debugging tips

Step 9: Sync and Verify

npx cap sync

Build and run on each platform to verify purchases work end-to-end:

npx cap run android
npx cap run ios

Error Handling

Products not appearing: On iOS, products may take up to a few hours to become available after creation in App Store Connect. Verify product status is "Ready to Submit" or "Approved". On Android, verify products are in "Active" status and the app has been uploaded to at least the internal testing track.
Purchase fails silently on Android: The app must be installed from Google Play (not via direct APK install). Upload the app to the internal testing track, add test accounts under License Testing, and install from Google Play.
iOS sandbox purchase loops or fails: Ensure the device is signed into a Sandbox test account (Settings > App Store > Sandbox Account on iOS 14+). Do not use a production Apple ID for testing.
purchaseProduct() returns error on Android: Verify google-services.json is present and the Google Play Billing Library version is compatible. Check $googlePlayBillingVersion in android/variables.gradle.
Receipt validation fails: On iOS, verify the JWS token via transaction.verificationResult. On Android, validate transaction.token, transaction.originalJson, and transaction.signature against the Google Play Developer API.
Restore purchases shows nothing: On iOS, syncTransactions() displays a system authentication dialog — it must be called in response to an explicit user action (e.g., a "Restore Purchases" button tap). On Android, it runs silently.
finishTransaction() not called: Unfinished transactions block future purchases on some platforms. Always call finishTransaction() after delivering content. Check for unfinished transactions at every app launch.
Plugin not found at runtime: Ensure npx cap sync was run after installation. For Capawesome Purchases, verify the Capawesome npm registry is configured.
Capacitor version mismatch: Both Capawesome Purchases and RevenueCat require Capacitor 8+. Check @capacitor/core version in package.json.

capacitor-plugins — For general Capacitor plugin installation and configuration, including the Capawesome Purchases and RevenueCat plugins.
capawesome-cloud — For app store publishing after in-app purchases are configured.
capawesome-mcp — Connect an MCP client to the hosted Capawesome MCP server for always-current documentation and Capawesome Cloud management.

View source ↗

File metadata

name: capacitor-in-app-purchases
description: "Guides the agent through setting up in-app purchases in Capacitor apps. Covers App Store Connect and Google Play Console product configuration, plugin selection (Capawesome Purchases vs. RevenueCat), plugin installation and platform setup, purchase flows for subscriptions and consumables, receipt validation, restore purchases, handling unfinished transactions, and testing with sandbox and StoreKit environments. Do not use for non-Capacitor mobile frameworks, Stripe payment processing, or physical goods checkout."
metadata:
  author: capawesome-team
  source: https://github.com/capawesome-team/skills/tree/main/skills/capacitor-in-app-purchases

View original text

---
name: capacitor-in-app-purchases
description: "Guides the agent through setting up in-app purchases in Capacitor apps. Covers App Store Connect and Google Play Console product configuration, plugin selection (Capawesome Purchases vs. RevenueCat), plugin installation and platform setup, purchase flows for subscriptions and consumables, receipt validation, restore purchases, handling unfinished transactions, and testing with sandbox and StoreKit environments. Do not use for non-Capacitor mobile frameworks, Stripe payment processing, or physical goods checkout."
metadata:
author: capawesome-team
source: https://github.com/capawesome-team/skills/tree/main/skills/capacitor-in-app-purchases
---

# Capacitor In-App Purchases

Set up in-app purchases and subscriptions in Capacitor apps, covering store configuration, plugin integration, purchase flows, receipt validation, and testing.

## Prerequisites

1. **Capacitor 6, 7, or 8** app (Capawesome Purchases requires Capacitor 8+; RevenueCat requires Capacitor 8+).
2. Node.js and npm installed.
3. For **iOS**: A paid [Apple Developer Program](https://developer.apple.com/programs/) membership, Xcode installed, and an app created in [App Store Connect](https://appstoreconnect.apple.com).
4. For **Android**: A [Google Play Developer](https://play.google.com/console) account, Android Studio installed, and an app created in Google Play Console.

## Agent Behavior

- **Guide step-by-step.** Walk the user through the process one step at a time. Never present multiple unrelated questions at once.
- **Auto-detect before asking.** Check the project for platforms (`android/`, `ios/`), `package.json` dependencies, and Capacitor version. Only ask the user when something cannot be detected.
- **One decision at a time.** When a step requires user input, ask that single question, wait for the answer, then continue.
- **Present clear options.** Provide concrete choices (e.g., "Which purchases plugin do you want to use? (1) Capawesome Purchases (2) RevenueCat") instead of open-ended questions.

## MCP Server

The [Capawesome MCP server](https://capawesome.io/docs/ai/mcp/) serves the current Capawesome documentation, so it is always ahead of the guidance bundled with this skill.

- **If the Capawesome MCP tools are available**, call `search_docs` for the topic and read the matching page with `get_doc_page` before applying the guidance below. Where the two disagree, follow the documentation.
- **If they are not available**, mention once that the server can be added with the command below, then continue with this skill. Never block on it.

```bash
claude mcp add --transport http capawesome "https://mcp.capawesome.io/mcp"
```

The documentation tools need no account and no token. See the `capawesome-mcp` skill for full setup, including the Capawesome Cloud tools.

## Procedures

### Step 1: Analyze the Project

Auto-detect the following by reading project files — do **not** ask the user for information that can be inferred:

1. **Platforms**: Check which directories exist (`android/`, `ios/`). These are the platforms to configure.
2. **Capacitor version**: Read `@capacitor/core` version from `package.json`.
3. **Existing purchases plugins**: Check if `@capawesome-team/capacitor-purchases`, `@revenuecat/purchases-capacitor`, or any other in-app purchase plugin is already in `package.json`. If found, inform the user and ask whether to continue with the existing plugin or switch.

### Step 2: Configure Products in App Store Connect (iOS)

Skip if `ios/` does not exist.

Read `references/app-store-connect-setup.md` and guide the user through creating in-app purchase products and subscriptions in App Store Connect. This covers:

- Accepting required developer agreements
- Verifying business configuration (Paid Apps Agreement, bank account, tax forms)
- Creating in-app purchase products (consumables, non-consumables, subscriptions)
- Subscription group setup
- Product status requirements

### Step 3: Configure Products in Google Play Console (Android)

Skip if `android/` does not exist.

Read `references/google-play-console-setup.md` and guide the user through creating in-app purchase products in Google Play Console. This covers:

- Completing compliance and metadata requirements
- Creating in-app products and subscriptions
- Configuring pricing and tax settings
- Activating products

### Step 4: Choose a Purchases Plugin

Ask the user which plugin to use:

1. **Capawesome Purchases** (`@capawesome-team/capacitor-purchases`) — Lightweight, no third-party backend dependency. Requires a Capawesome Insiders license. Server-side receipt validation is the developer's responsibility.
2. **RevenueCat** (`@revenuecat/purchases-capacitor`) — Full backend service with server-side receipt validation, entitlement management, analytics, and integrations. Requires a RevenueCat account.

**Default recommendation**: Capawesome Purchases for apps that already have a backend for receipt validation or want to avoid third-party dependencies. RevenueCat for apps that want managed receipt validation and subscription analytics out of the box.

### Step 5: Install and Configure the Plugin

Based on the user's choice in Step 4:

- **Capawesome Purchases**: Read `references/capawesome-purchases-setup.md` and follow the installation and platform configuration steps.
- **RevenueCat**: Read `references/revenuecat-setup.md` and follow the installation and platform configuration steps.

### Step 6: Implement Purchase Flows

Based on the user's plugin choice:

- **Capawesome Purchases**: Read `references/capawesome-purchases-implementation.md` and add the purchase code to the project.
- **RevenueCat**: Read `references/revenuecat-implementation.md` and add the purchase code to the project.

Adapt imports and code structure to match the user's framework (Angular, React, Vue, etc.).

The implementation covers:

1. Fetching product details
2. Purchasing a product
3. Finishing transactions (Capawesome) or checking entitlements (RevenueCat)
4. Restoring purchases
5. Handling unfinished transactions on app startup
6. Receipt validation strategy

### Step 7: Configure Optional Features

Ask the user which optional features to enable:

1. **Subscription management** — Display subscription status, handle renewals and expirations.
2. **Introductory offer eligibility** — Check if a user qualifies for introductory pricing (Capawesome Purchases only).
3. **Server notifications** — Set up App Store Server Notifications and/or Google Play Real-time Developer Notifications for subscription lifecycle events.

For each selected feature, read the corresponding implementation reference file and apply the relevant code.

### Step 8: Test Purchases

Read `references/testing.md` and guide the user through testing in-app purchases on both platforms. This covers:

- iOS Sandbox testing with test accounts
- iOS StoreKit Testing in Xcode
- Android testing with Google Play Console internal track and license testing accounts
- Common testing pitfalls and debugging tips

### Step 9: Sync and Verify

```bash
npx cap sync
```

Build and run on each platform to verify purchases work end-to-end:

```bash
npx cap run android
npx cap run ios
```

## Error Handling

- **Products not appearing**: On iOS, products may take up to a few hours to become available after creation in App Store Connect. Verify product status is "Ready to Submit" or "Approved". On Android, verify products are in "Active" status and the app has been uploaded to at least the internal testing track.
- **Purchase fails silently on Android**: The app must be installed from Google Play (not via direct APK install). Upload the app to the internal testing track, add test accounts under License Testing, and install from Google Play.
- **iOS sandbox purchase loops or fails**: Ensure the device is signed into a Sandbox test account (Settings > App Store > Sandbox Account on iOS 14+). Do not use a production Apple ID for testing.
- **`purchaseProduct()` returns error on Android**: Verify `google-services.json` is present and the Google Play Billing Library version is compatible. Check `$googlePlayBillingVersion` in `android/variables.gradle`.
- **Receipt validation fails**: On iOS, verify the JWS token via `transaction.verificationResult`. On Android, validate `transaction.token`, `transaction.originalJson`, and `transaction.signature` against the Google Play Developer API.
- **Restore purchases shows nothing**: On iOS, `syncTransactions()` displays a system authentication dialog — it must be called in response to an explicit user action (e.g., a "Restore Purchases" button tap). On Android, it runs silently.
- **`finishTransaction()` not called**: Unfinished transactions block future purchases on some platforms. Always call `finishTransaction()` after delivering content. Check for unfinished transactions at every app launch.
- **Plugin not found at runtime**: Ensure `npx cap sync` was run after installation. For Capawesome Purchases, verify the Capawesome npm registry is configured.
- **Capacitor version mismatch**: Both Capawesome Purchases and RevenueCat require Capacitor 8+. Check `@capacitor/core` version in `package.json`.

## Related Skills

- **`capacitor-plugins`** — For general Capacitor plugin installation and configuration, including the Capawesome Purchases and RevenueCat plugins.
- **`capawesome-cloud`** — For app store publishing after in-app purchases are configured.
- **`capawesome-mcp`** — Connect an MCP client to the hosted Capawesome MCP server for always-current documentation and Capawesome Cloud management.

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

Dependency or permission surface needs review
Permission surface may require sandboxing
Financial research output is not financial advice; require human review before any live investment decision
Low GitHub adoption signal

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & trust

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

License: MIT
Version: 1.0.0
Last GitHub push: Sep 1, 2026
Registry updated: Sep 1, 2026
Instruction path: skills/capacitor-in-app-purchases/SKILL.md

Version reported in registry metadata; check source releases before relying on it.

Quality

63/100

Promising

Trust

62/100

Sandbox only

Audit

75/100

Needs review

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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      "riskBlocked": 0,
      "setupRequired": 0,
      "notRelevant": 0,
      "avgOutputQuality": null,
      "avgTimeToUsefulMs": null,
      "productionOutcomes": 0,
      "humanReviewRequired": 0,
      "uniqueAgents": 0,
      "lastOutcomeAt": null
    },
    "signals": [],
    "penalties": [
      "No real agent outcome evidence yet"
    ]
  },
  "audit": {
    "score": 75,
    "risk_level": "needs_review",
    "risk_label": "Needs review",
    "warnings": [
      "Dependency or permission surface needs review",
      "Permission surface may require sandboxing",
      "Financial research output is not financial advice; require human review before any live investment decision",
      "Low GitHub adoption signal",
      "Financial research output is not financial advice; require human review before any live investment decision.",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 44 GitHub stars"
    ]
  },
  "safety_gate": {
    "tier": "blocked",
    "label": "Blocked for auto-install",
    "auto_install_policy": "block",
    "auto_install_allowed": false,
    "human_review_required": true,
    "blocked": true,
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
  },
  "quality": {
    "score": 63,
    "label": "Promising"
  },
  "supply": {
    "track": "Coding and developer agents",
    "scenario": "Coding agents",
    "maintenance": "7d since push",
    "risk": "Needs review"
  },
  "alternative_skills": [],
  "do_not_use_when": [
    "teams that need a vendor-supported SLA",
    "production agents without a repository review",
    "Low GitHub adoption signal",
    "No OpenAgentSkill engagement data yet",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "Financial research output is not financial advice; require human review before any live investment decision"
  ],
  "agent_contract": {
    "task_input": "Use capacitor-in-app-purchases in an agent workflow",
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
    "install_policy": "block",
    "minimum_review_before_use": [
      "Trust: 70/100 Manual review",
      "Audit: 75/100 Needs review",
      "Safety: 31/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "capawesome-team-capacitor-in-app-purchases (capacitor-in-app-purchases)",
      "install_command": "npx skills add capawesome-team/skills --skill capacitor-in-app-purchases",
      "risk_summary": "Needs review; Blocked for auto-install; Review before production",
      "verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
    }
  },
  "outcome_feedback": {
    "endpoint": "https://www.openagentskill.com/api/agent/outcome",
    "method": "POST",
    "requires_resolve_event_id": true,
    "event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
    "expected_outcomes": [
      "success",
      "failed",
      "not_relevant",
      "blocked_by_risk",
      "setup_required"
    ],
    "payload_template": {
      "event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
      "skill_slug": "capawesome-team-capacitor-in-app-purchases",
      "task": "Use capacitor-in-app-purchases in an agent workflow",
      "agent": "codex",
      "outcome": "success",
      "install_used": true,
      "risk_blocked": false,
      "setup_required": false,
      "task_success": true,
      "output_quality": 4,
      "error_type": null,
      "human_review_required": false,
      "workspace": "sandbox",
      "time_to_useful_ms": 120000,
      "notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
    }
  },
  "endpoints": {
    "web": "https://www.openagentskill.com/skills/capawesome-team-capacitor-in-app-purchases",
    "api": "https://www.openagentskill.com/api/agent/skills/capawesome-team-capacitor-in-app-purchases",
    "audit": "https://www.openagentskill.com/skills/capawesome-team-capacitor-in-app-purchases/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=capawesome-team-capacitor-in-app-purchases&task=Use%20capacitor-in-app-purchases%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20capacitor-in-app-purchases%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20capacitor-in-app-purchases%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/capawesome-team-capacitor-in-app-purchases/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/capawesome-team-capacitor-in-app-purchases"
  }
}

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Creator: capawesome-team
Source: capawesome-team/skills
Indexed by: OpenAgentSkill community index

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[![OpenAgentSkill Trust](https://www.openagentskill.com/api/badge/capawesome-team-capacitor-in-app-purchases?metric=trust&label=Trust)](https://www.openagentskill.com/skills/capawesome-team-capacitor-in-app-purchases?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)
[![OpenAgentSkill Audit](https://www.openagentskill.com/api/badge/capawesome-team-capacitor-in-app-purchases?metric=audit&label=Audit)](https://www.openagentskill.com/skills/capawesome-team-capacitor-in-app-purchases/audit)
[![Agent Proven](https://www.openagentskill.com/api/badge/capawesome-team-capacitor-in-app-purchases?metric=proven&label=Agent%20Proven)](https://www.openagentskill.com/skills/capawesome-team-capacitor-in-app-purchases?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)

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