Blog tag

Developer Guides

Implementation-focused guides, schemas, testing checklists, and production operations.

Neon architecture diagram for a PayPal alternative with checkout, wallet ledger, bank rails, cards, stablecoins, and payouts

API ArchitectureOctober 5, 2026

How to Build a PayPal Alternative with a Global Payments API

An architecture guide for a wallet-and-payments platform with a ledger, funding rails, checkout, payouts, disputes, risk, FX, and developer APIs.

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Neon World Chain payment flow showing a mini app, user wallet, stablecoin transfer, and verification service

Blockchain PaymentsDecember 4, 2025

World Chain Payment API Guide: Mini Apps, WLD, and Stablecoin Flows

A developer-focused guide to payment flows in World App and World Chain, including Mini Apps, WLD, stablecoins, gas sponsorship, verification, and refunds.

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Browse the complete Field Notes collection.

Explore all 10 implementation guides and their related payment architecture pages.

All Field Notes Developer blueprint