SDKs & Libraries

Peak Gateway provides official SDKs for core integration targets.

TypeScript SDK

• Package: @gateway/sdk
• Runtimes: Node.js 18+, Deno, Cloudflare Workers, modern browsers
• Dependencies: None (zero runtime dependencies)

Install:

npm install @gateway/sdk

The TypeScript SDK exposes two client classes:

• GatewayAdminClient — Full admin and portal operations (17 API modules)
• GatewayPayClient — Payment-facing operations for checkout flows and e-commerce (6 API modules)

Quick start:

import { GatewayAdminClient, CardDataSource, IndustryType } from '@gateway/sdk'

const client = new GatewayAdminClient({
  clientId: 'your_client_id',
  clientSecret: 'sk_live_xxxxxxxxxxxx',
  environment: 'production',
})

const result = await client.transactions.sale({
  amount: 2500,
  currency: 'USD',
  cardDataSource: CardDataSource.INTERNET,
  industryType: IndustryType.ECOMMERCE,
})

if (result.kind === 'approved') {
  console.log(`Approved: ${result.approvalCode}`)
}

For full documentation including authentication, error handling, webhook verification, and all API modules, see the TypeScript SDK reference.

Kotlin SDKs

• gateway-sdk-core — KMP core client (JVM, Android, iOS future)
• gateway-sdk-android — Android ViewModel extensions

Recommended for Android and JVM-based gateway integrations.

For full documentation, see the Kotlin SDK reference.

SDK Guidance

• Keep SDK versions pinned in production workloads
• Use test credentials in non-production environments
• Implement retries and idempotency for create/capture/refund operations
• Both SDKs handle automatic token refresh and exponential backoff retries