ButterPay Documentation

Non-custodial crypto payment infrastructure for stablecoin settlement. Customers pay any token; merchants receive USDT/USDC. 0.8% fee. Stripe-compatible webhooks.

This documentation covers the public HTTP API and the official @butterpay/core SDK.

What you'll find here

• Overview — what ButterPay is, supported chains, supported tokens, fees
• Getting Started — 10-minute end-to-end integration
• Authentication — Bearer JWT, X-Api-Key, sessionToken
• Webhooks — events, signing, retry policy, security
• API Reference — Invoices, Merchants, Plans & Subscriptions, Webhooks Management
• SDK — @butterpay/core

Status

• Arbitrum mainnet live
• Ethereum / BSC / Polygon coming soon (audit pending)
• API: https://api.butterpay.io
• Hosted payment page: https://pay.butterpay.io