> ## Documentation Index
> Fetch the complete documentation index at: https://ownpay.org/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> OwnPay is licensed under AGPL-3.0 and is completely free - no licensing fees.
> Production docs URL: https://ownpay.org/docs - append .md to any page URL for clean markdown.
> OwnPay requires PHP 8.3+, MySQL/MariaDB, and Redis.
> MCP server available at https://ownpay.org/docs/mcp for programmatic documentation queries.
> Use root-relative links (e.g. /quickstart) for internal navigation - do NOT include /docs prefix.
> Plugin development: consult /developer/plugin-types/ pages for correct interfaces and manifests.

# Gateway Plugin AI Prompt: Generate Gateway Code with AI

> Instruct your AI coding assistant to use the OwnPay Docs MCP server and skills file to discover and generate a payment gateway plugin.

This page provides a prompt template that instructs your AI assistant (such as Claude, Cursor, or Windsurf) to use the OwnPay Docs MCP server and skills file to dynamically retrieve the latest specifications and scaffold a gateway plugin.

Instead of copy-pasting code contracts, the prompt directs the AI to query the MCP server to find the required class interfaces, manifest formats, and security rules itself.

## 1. Prerequisites

Ensure your AI assistant has access to the following resources:

* **MCP Server URL:** `https://ownpay.org/docs/mcp` (provides search and query tools)
* **Skills File URL:** `https://ownpay.org/docs/skill.md` (provides platform guidelines)

*See the [AI MCP Integration Guide](/developer/ai-mcp) and [AI Skills Installation](/developer/ai-skills) for setup instructions.*

***

## 2. System Instructions for the AI Agent

If your tool supports system instructions or custom rules (e.g. Cursor .cursorrules, Claude Projects, or custom GPT instructions), paste the following block:

```text theme={null}
You are an expert PHP developer building a payment gateway plugin for the OwnPay platform.

You are equipped with the OwnPay Docs MCP server (https://ownpay.org/docs/mcp) and the OwnPay skills file (https://ownpay.org/docs/skill.md).

When asked to generate a gateway plugin:
1. Do not rely on assumptions or hardcoded templates.
2. Use your MCP tools to search the documentation for "Gateway Plugin Development Guide" to retrieve the required class interfaces, directory structure, manifest.json fields, and security requirements.
3. Retrieve and inspect the specifications for:
   - manifest.json schema and required capability tags
   - GatewayAdapterInterface and PluginInterface method signatures (e.g. initiate, verify, verifyWebhook, refund)
   - CSP (Content Security Policy) and database migration folder structures
4. Generate the plugin codebase strictly following the retrieved specifications.
```

***

## 3. Developer User Prompt

Paste the following prompt in your AI chat session to initiate the generation. Replace the bracketed values with your gateway details:

```text theme={null}
I want to create a new payment gateway plugin for [Gateway Name, e.g., Paddle] with slug "[gateway-slug, e.g., paddle]".

Please perform the following steps:
1. Use the OwnPay Docs MCP server tools to search the documentation for "Gateway Plugin Development Guide" or search for "GatewayAdapterInterface".
2. Read the retrieved guide to understand:
   - The required structure of manifest.json (entrypoint, namespace, capabilities)
   - The exact signatures and return types for the required adapter methods (initiate, verify, verifyWebhook, refund, supports, supportedCurrencies)
   - The security requirements (timing-safe hash_equals, webhook timestamp replay check, server-to-server verification)
3. Generate the manifest.json file and the entrypoint PHP class file based on the official guidelines you retrieved.
```

***

## 4. Expected Output Discovery

By querying the MCP server, the AI agent will discover the correct layout and generate:

```text theme={null}
modules/gateways/paddle/
├── manifest.json         # Configured with type "gateway" and Paddle settings fields
├── PaddleGateway.php     # Implementing PluginInterface & GatewayAdapterInterface
├── icon.svg              # SVG logo placeholder
└── README.md             # Setup and configuration guidelines
```


## Related topics

- [Addon Plugin AI Prompt - Generate Addon Extensions with AI](/docs/developer/plugin-types/addon-prompt.md)
- [Theme Plugin AI Prompt - Generate Checkout Themes with AI](/docs/developer/plugin-types/theme-prompt.md)
- [AI Tools Overview - Use AI Agents for Payment Development](/docs/developer/ai-overview.md)
- [Integration AI Prompt: Generate Webhook Integrations Fast](/docs/developer/plugin-types/integration-prompt.md)
- [OwnPay MCP Server - Connect AI Tools to Live Documentation](/docs/developer/ai-mcp.md)