Documentation

Everything you need to integrate FareSide payments into your application.

Getting Started

Welcome to FareSide

x402 infrastructure: open-source tools and managed services for AI agent payments

3 min read

Quickstart

Accept your first x402 payment in 5 minutes

5 min read

Supported Networks

Chains and tokens supported by FareSide

3 min read

Merchants

Dashboard

Monitor payments, manage organizations, and get your API key

4 min read

Setup Guide

Get your FareSide API key and configure your integration

5 min read

Hono / Express / Next.js

TypeScript integration examples for popular frameworks

8 min read

Rust (Axum)

Rust integration with Axum framework using x402-axum

8 min read

Clients

Making Payments

Learn how to build x402 clients that can pay for services

6 min read

Core Concepts

EVM Asset Transfer Methods

How EIP-3009 and Permit2 transfers work in x402 on EVM chains

10 min read

Upto Scheme

Usage-based payments with maximum amount authorization

8 min read

EIP-2612 Gas Sponsoring

Gasless Permit2 approval for ERC-20 tokens with EIP-2612 support

8 min read

Advanced

Self-Hosting

Run your own x402 facilitator with x402-rs

15 min read

Build Your Own Facilitator

Create a custom x402 facilitator using Rust

15 min read

How to Write a Scheme

Implement custom payment logic for x402-rs

12 min read

Resources

Contact

Get in touch with the FareSide team

1 min read