Fivo Documentation

Accept stablecoin payments across 6 blockchains with a single integration. No crypto expertise required.

Quick Start

Get started in 5 minutes with our copy-paste widget

API Reference

Full API documentation for custom integrations

What is Fivo?

Fivo is a multi-chain stablecoin payment gateway that allows merchants to accept USDC and EURC payments from customers on any supported blockchain. Powered by Circle's infrastructure and CCTP (Cross-Chain Transfer Protocol), Fivo automatically handles cross-chain transfers when a customer pays from a different blockchain than the merchant's receiving wallet.

Key Features

Stablecoin Payments

Accept USDC and EURC - stable currencies pegged to USD and EUR. No price volatility, instant settlement.

Multi-Chain Support

Support payments from 6 blockchains: Ethereum, Polygon, Avalanche, Arbitrum, Base, and Optimism.

Automatic Cross-Chain

CCTP technology automatically bridges payments to your preferred blockchain. No manual bridging needed.

Secure & Non-Custodial

Supported Blockchains

Fivo operates on 6 EVM mainnets with full USDC and EURC support.

Blockchain	Network	Chain ID	CCTP Domain
Ethereum	Sepolia	`11155111`	0
Polygon	Amoy	`80002`	7
Avalanche	Fuji	`43113`	1
Arbitrum	Sepolia	`421614`	3
Base	Sepolia	`84532`	6
Optimism	Sepolia	`11155420`	2

How It Works

Customer clicks "Pay with Fivo"

The payment widget opens and scans the customer's wallet for USDC/EURC balances across all supported chains.

Customer selects payment source

The customer chooses which blockchain to pay from. The widget shows gas costs and any bridging fees upfront.

Transaction is processed

If same-chain: instant transfer. If cross-chain: CCTP burns tokens on source chain and mints on destination chain (usually 2-5 minutes).

Merchant receives payment

Funds arrive in the merchant's wallet. Email notification is sent with transaction details.

Ready to get started?

Follow our Quick Start guide to accept your first payment in under 5 minutes.

Quick Start Guide