Building Payment Apps with Claude.ai and MoneyGraph

Claude.ai from Anthropic is one of the most capable AI assistants for complex reasoning and code generation. With MoneyGraph's CLAUDE_AI_INSTRUCTIONS.md, Claude understands how to build compliant payment applications from your first prompt.

Why Claude + MoneyGraph?

Together, they create a powerful fintech development environment.

Setup: Add Project Instructions

In Claude.ai:

1. Create a new Project
2. Go to Project Knowledge
3. Paste the contents of CLAUDE_AI_INSTRUCTIONS.md

That's it. Claude now understands MoneyGraph.

Quick Start Prompt

Try this prompt in your Claude Project:

I need to build a remittance API using MoneyGraph SDK.

Build a REST API with these endpoints: - POST /customers - Register new customer - POST /customers/:id/kyc - Submit KYC documents - POST /quotes - Get FX quote (USD to any currency) - POST /payouts - Send money internationally

Rules: - Always check KYC status before allowing payouts - Use Quote → Confirm → Payout flow for FX - Handle MoneyGraph error types properly - Use environment variables for API keys - Add proper TypeScript types

First, npm install @moneygraph/sdk, then build the API. ```

Claude will generate a complete, production-ready REST API with compliance built-in!

What Claude Learns

Our project instructions teach Claude:

The Golden Rule: KYC Before Payouts

// Claude always generates this check
const status = await mg.customers.kyc.canPayout(customerId);
if (!status.allowed) {
  throw new Error(`KYC not approved: ${status.status}`);
}

Quote → Confirm → Payout

// Claude knows the FX flow
const quote = await mg.fx.quote({ from: 'USD', to: 'NGN', amount: 100 });
await mg.fx.confirm(quote.id);  // Lock rate for 2 minutes
const payout = await mg.payouts.create({ quote_id: quote.id, ... });

All SDK Namespaces

Claude knows which namespace to use for each operation:

Example Prompts

Try these prompts with Claude:

Build a Remittance API

Prompt: "Build a REST API for a remittance service using MoneyGraph. Users should be able to register, complete KYC, and send money to Nigeria."

Claude generates:

• Express.js routes
• Customer registration with validation
• KYC submission flow
• Quote and payout endpoints
• Error handling with MoneyGraph error types

Create a Wallet System

Prompt: "Create a multi-currency wallet system where users can hold USD, EUR, and NGN. Include FX conversion between currencies."

Claude generates:

• Wallet creation for each currency
• Balance checking
• FX quote display with countdown
• Wallet-to-wallet transfers

Issue Virtual Cards

Prompt: "Build a virtual card issuance feature. Users with approved KYC can create USD cards and fund them from their wallet."

Claude generates:

• KYC verification before issuance
• Card creation with spending limits
• Funding from wallet balance
• Card freeze/unfreeze controls

Getting Started

Next Steps:

• Claude Projects Guide - Learn about Claude Projects and Knowledge
• MoneyGraph SDK Docs - Complete API reference
• Example Prompts - Ready-to-use Claude prompts

Claude is now your fintech-aware AI coding partner with built-in compliance knowledge.