# Overview

## Overview

Sigwei enables blockchain payments over HTTP using the x402 protocol. Send gasless USDC transfers and monetize APIs without blockchain infrastructure complexity.

### Core Features

* **Gasless USDC Transfers**: Send USDC on Base blockchain without gas fees
* **PayGate System**: Create payment-protected proxy links for API monetization
* **x402 Protocol**: HTTP 402 (Payment Required) responses with blockchain payment verification
* **API-First**: Pure backend service with comprehensive REST API endpoints
* **Multi-Network**: Base Mainnet and Base Sepolia Testnet support
* **Target URL Verification**: HMAC and plaintext authentication modes for forwarded requests
* **Enterprise Security**: JWT authentication, structured error responses, comprehensive validation

### Target Use Cases

* API providers monetizing endpoints for both human developers and AI agents
* Micropayments for content and file access via programmatic transfers
* Automated payment workflows for machine-to-machine interactions
* Developers needing simple blockchain payment integration

## Quick Start

New to Sigwei? Start with our [Getting Started](getting-started) guide to begin using the API.

## Need Help?

Check out our [Support & Resources](support) section for troubleshooting and additional resources.
