Developer documentation for Bag — the Merchant of Record for global stablecoin payments.

Welcome to Bag

Bag is a Merchant of Record for global stablecoin payments. When your customer pays, they pay Bag — and Bag pays you. In between, we handle tax collection, compliance, invoicing, and cross-border settlement.

You build your product. We handle the money stuff. Starting at 1.5% per transaction.

What Bag handles

Tax calculation — automatic tax collection for every jurisdiction
Compliance — KYB verification, regulatory requirements
Invoicing — compliant invoices generated for every transaction
Payment processing — on-chain stablecoin payments across multiple networks
Settlement — funds delivered to your wallet

What you handle

Your product and UI
A webhook endpoint to know when you get paid

Supported networks

Network	Mainnet	Testnet
Base	`base`	`base_sepolia`
Ethereum	`ethereum`	`eth_sepolia`
Polygon	`polygon`	—
Solana	`solana`	`solana_devnet`

Get started

Quickstart

Go from zero to your first test payment in under 10 minutes.

Authentication

Understand test vs. live API keys and Bearer auth.

API Reference

Full endpoint documentation generated from our OpenAPI spec.

Introduction