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Mogami delivers the full x402 stack — from SDKs to gateway — enabling instant, frictionless stablecoin payments for APIs, apps, and AI agents.

Java client SDK

x402 Java client makes it easy to bring x402 payments into your applications. With just a few lines of code, you can fetch requirements, sign payloads, and send transactions securely. It handles expiration, authorization, and signature logic behind the scenes, so you can focus on building features instead of managing payments.

Java server SDK

x402 Spring boot starter lets you transform any API into a pay-per-call service powered by x402. With a single Spring Boot annotation, you can enforce stablecoin payments before granting access — no accounts, no subscriptions, no custom wiring. The SDK automatically verifies payment payloads and handles errors gracefully, letting you stay focused on your business logic.

Facilitator server

Mogami Facilitator server acts as your payment gateway for x402. You can run it as a Docker image within your own infrastructure, or use our always-on hosted facilitator online at https://facilitator.mogami.tech. It verifies, authorizes, and settles x402 transactions in real time, connecting your services to the blockchain securely while keeping private keys safe.

Playground service (examples)

x402 examples showcase real-world x402 payment flows you can run and adapt instantly. From protecting endpoints with paywalls to demonstrating full transaction lifecycles, they’re designed to teach by doing. https://playground.mogami.tech lets you experience those exemples in action. It’s a live REST API protected by x402 that you can call directly from your own client code.