X402 Stablecoin payments for AI apps, agents, APIs, and connected devices

Add direct USDC payments without requiring cards, recurring billing, or custodial accounts. Stablecoin Merchant is the focused on merchant support for ModelGlue x402.

Start accepting USDC View developer examples Request integration help

USDC on BaseSelf-custody walletsNo recurring card charge required

Built forAI appsAgentsAPIsMCP serversConnected devicesMarketplaces

Use cases

A focused payment front door for AI businesses

Stablecoin Merchant explains the business fit. ModelGlue x402 handles the operational payment experience.

AI startups and SaaS

Add usage-based USDC payments to AI products without building a separate wallet or settlement stack.

APIs and MCP servers

Gate requests, tools, data, or premium endpoints with x402-compatible payments.

Agents and automations

Give agentic software a clear payment path for paid actions and services.

Connected devices

Support machine, kiosk, vending, rental, and device-triggered stablecoin payments.

Digital marketplaces

Create direct merchant settlement flows for paid listings, access, and digital services.

Research and data

Charge for datasets, reports, analysis, or metered research workflows.

How it works

One sales experience. One ModelGlue payment product.

Connect your product

Point your application, API, agent, or device workflow to ModelGlue x402.

Choose the payment rule

Define the USDC amount, product identifier, receiving address, and return behavior.

Let the customer pay

The customer connects a compatible self-custody wallet and approves payment.

Unlock after verification

Your product confirms payment status before releasing access, content, or service.

Keep the operational payment system centralized

StablecoinMerchant.com should not become a second facilitator, customer database, or settlement stack. It sends qualified customers into ModelGlue for checkout, configuration, verification, receipts, and support.

Noncustodial payment software for adding x402-compatible stablecoin payments to apps, APIs, agents, and connected devices. Stablecoin Merchant does not custody customer wallets, keys, or seed phrases.

Open ModelGlue x402

Stablecoin MerchantDiscovery, education, leads

→

ModelGlue x402Checkout, verification, operations

Developers

Start with the payment boundary, not another billing platform

Use ModelGlue x402 as the operational payment layer while Stablecoin Merchant provides the business onboarding and integration path.

HTTP

curl -i https://your-app.example/premium-resource

JavaScript

const response = await fetch('/premium-resource');
if (response.status === 402) {
  // Open the ModelGlue-hosted checkout returned by your app.
}

PHP / WordPress

$status = wp_remote_get($modelglue_status_url);
// Unlock only after the verified payment state is returned.

View complete ModelGlue examples

Engagement options

Choose the integration path that matches your product

Developer

For prototypes, small AI products, and initial integrations.

Hosted checkout
Developer examples
Integration guidance

Discuss this path

Growth

Custom

For production apps, APIs, agent services, and higher payment volume.

Production configuration
Usage and receipt workflows
Priority integration support

Discuss this path

Enterprise & Devices

Custom

For connected devices, marketplaces, private deployments, and specialized workflows.

Custom routing
Device and machine use cases
Deployment planning

Discuss this path

Integration request

Tell us what you want to monetize

Describe your AI app, API, agent, marketplace, or connected-device payment flow. We will map the cleanest ModelGlue x402 integration path.

Submit the form and our team will reply to the work email you provide.