Do I need a wallet to use this skill?

You only need an EVM_WALLET_PRIVATE_KEY environment variable if you intend to make paid tool calls. Listing tools and calling free services do not require a wallet.

How do I list available tools on an MCP server?

You can use the --list-tools or -l flag with the server URL to see all available capabilities offered by the MCP server.

What is the x402 protocol?

x402 is a standardized protocol for handling HTTP 402 Payment Required errors specifically designed for machine-to-machine cryptocurrency payments on EVM blockchains.

Which blockchain networks are supported?

The skill currently supports Base, Avalanche, SKALE, Ethereum, Optimism, Arbitrum, and Polygon.

X402 MCP Tool Caller

Name: X402 MCP Tool Caller
Author: Xyber-Labs

byXyber-Labs

0•

Desarrollo de API

Integrates cryptocurrency payment capabilities into Model Context Protocol (MCP) server interactions across multiple EVM-compatible blockchains.

The x402-mcp-caller skill empowers developers to interact with paid Model Context Protocol (MCP) services by automating the x402 payment protocol workflow. By leveraging a local EVM wallet, the skill enables seamless testing and execution of paid API calls on major networks like Base, Avalanche, and Ethereum, allowing for programmatic access to premium AI-driven tools and services that require on-chain settlement. It simplifies the complexity of handling 402 Payment Required responses, making it an essential utility for developers working at the intersection of AI agents and Web3 infrastructure.

Características Principales

01Interactive MCP tool listing and discovery

02Automatic x402 payment protocol handling

03Standardized JSON response handling for paid tool calls

04EVM wallet integration via environment variables

05Multi-chain support for Base, Avalanche, SKALE, and Ethereum

060 GitHub stars

Casos de Uso

01Testing paid MCP server tools before production deployment

02Automating crypto-funded API calls within AI workflows

03Interacting with premium Web3 data services via MCP

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xyber-labs/xyber-skills x402-mcp-caller

For use in Claude.ai and ChatGPT

Download Skill