x402 Protocol • Session Keys • Widget SDK

Universal Pay-Per-Use
Widget for AI, SaaS & APIs

Add one widget to get paid automatically.

No accounts. No subscriptions. No personal info collected from anyone.

x402 Payment Flow
01 Agent Request
POST /api/query
{ prompt: "..." }
02 Payment Required
HTTP 402
amount: $0.05 USDC
03 Auto-Pay & Respond
HTTP 200 ✓
{ result: "..." }
For Developers

Monetize your AI tool with one widget

No Stripe setup. No subscriptions. No user database. No PII. Just drop in our widget and start earning instantly.

One-line integration

Drop in our widget and start earning.

Instant charging

We handle balance checks, payments, and receipts.

Zero infrastructure

No PCI, no fraud handling, no compliance.

Auto payout wallet

Receive funds automatically on every action.

No user accounts

Users auth with MixR—nothing for you to store.

Built-in distribution

Get discovered in the MixR Marketplace.

Add Widget in 2 Minutes
Your App Integration
Preview

Available Balance

$5.00

Widget preview • Sign in to try live demo

How It Works

A simple, universal flow

01

Developer adds widget

Define features, set prices, copy script.

02

User visits app

Widget checks wallet status automatically.

03

User loads $5

One-time setup, returns to app instantly.

04

Feature unlocks

Balance detected, gating disappears.

05

Pay-per-use

Cents charged per action, instantly.

06

Developer paid

Funds settle to payout wallet immediately.

For Users

One wallet for all your AI agents

Stop juggling accounts and subscriptions. Load as little as $5 and use any AI tool instantly.

Use any AI instantly

One wallet unlocks every MixR-enabled agent and tool.

Pay-Per-Use

Actions cost cents. No subscriptions. No commitments.

Privacy by default

No emails, accounts, or credit cards shared with apps.

Works everywhere

Inside apps, websites, and our browser extension.

Agent-to-Agent

Agents can finally pay agents

MixR Pay enables autonomous agents to pay APIs or other agents on-chain using smart wallets and session keys. The missing primitive for multi-agent systems.

Budgeted spending per workflow
Smart-account wallets per agent
Usage metering + price enforcement
Automatic settlement per call
Learn about A2A Payments
Multi-Agent Workflow

Research Agent

Queries APIs

$0.02

Analysis Agent

Processes data

$0.05

Writing Agent

Generates output

$0.08
Total cost$0.15

Why MixR Pay

Built for both sides of the AI economy.

For Users

No subscriptions
No accounts
$5 to start
Total privacy
Unified wallet
Works anywhere

For Developers

Instant monetization
No billing to build
Zero PII liability
Auto payouts
Built-in distribution
Fraud-proof metering
Safe. Non-custodial. Privacy-preserving.

MixR never holds user funds. Users retain full control. No personal information stored. Every transaction is transparent and verifiable.

Ready to get started?

Start building in under 10 minutes. No contracts, no minimums, no hidden fees.