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io.github.jmthomasofficial/x402-mcp-server

Official registry AI and agents

JMT x402: 35 pay-per-call Base/USDC tools for agents, auto-paid via x402 v2. No API key.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @jmthomasofficial/x402-mcp-server
Claude Code 
claude mcp add x402-mcp-server -e 'JMT_X402_PRIVATE_KEY=<JMT_X402_PRIVATE_KEY>' -- npx -y @jmthomasofficial/x402-mcp-server@2.0.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "x402-mcp-server": {
            "command": "npx",
            "args": [
                "-y",
                "@jmthomasofficial/x402-mcp-server@2.0.1"
            ],
            "env": {
                "JMT_X402_PRIVATE_KEY": "<JMT_X402_PRIVATE_KEY>"
            }
        }
    }
}

Environment variables

  • JMT_X402_PRIVATE_KEY Base-mainnet wallet private key (funded with USDC). Used only to sign x402 payment authorizations. Never logged.

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. JMT x402 MCP Server
  2. What This Does
  3. Tools
  4. Payment Setup
  5. Installation
  6. Discovery
  7. License

JMT x402 MCP Server

25 pay-per-call API tools for AI agents, powered by the x402 protocol on Base mainnet.

What This Does

This MCP server exposes 25 paid API endpoints as MCP tools. When an AI agent (Claude, Cursor, Cline) calls a tool, the request goes to our x402 server. The first request returns HTTP 402 (Payment Required). The agent's x402 client pays in USDC on Base mainnet and retries for the result.

No API keys. No signup. Payment IS the authentication.

Tools

ToolPriceDescription
ai_answer$0.03AI-powered search answer with citations
company_intel$0.10Company intelligence dossier with SWOT analysis
sec_filing_analyzer$0.08SEC 10-K/10-Q analysis with risk extraction
news_briefing$0.05Multi-source news briefing with LLM summary
social_sentiment$0.05Cross-platform social sentiment analysis
macro_dashboard$0.04Macro economic dashboard with LLM commentary
market_pulse$0.04Stock market pulse with analyst sentiment
crypto_research$0.05Crypto research brief with on-chain analysis
competitor_analysis$0.08Competitor comparison matrix
domain_trust_score$0.04Domain trust score 0-100 with risk factors
regulatory_monitor$0.06Regulatory filing monitor with impact analysis
web_search$0.02Web search via SearXNG
url_extract$0.02Extract clean text from any URL
summarize$0.05AI-powered text summary
analyze$0.10Deep AI analysis with web research
deep_research$0.15Deep research report with sources
crypto_price$0.03Live crypto price lookup
stock_quote$0.03Live stock quote
gas_snapshot$0.002Live Base gas snapshot
treasury_yields$0.03US Treasury yield curve
whois$0.01WHOIS/RDAP domain lookup
edgar_lookup$0.01SEC EDGAR company lookup
hash$0.001Hash text (SHA-256, SHA-512, MD5)
json_to_csv$0.002Convert JSON array to CSV
text_diff$0.002Compare two text strings

Payment Setup

  • Protocol: x402 v1
  • Network: Base mainnet (eip155:8453)
  • Currency: USDC (Bridged USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)
  • Facilitator: Dexter (x402.dexter.cash) — 0% fee, gas-sponsored for buyers
  • Pay-to wallet: 0x624FaF18C78456C8Da5bf156Cd77c1A2033F21c5

To make paid calls, install an x402 client:

npm install @x402/fetch @x402/evm

Installation

npm install
npm start

Discovery

License

MIT

Frequently asked questions

What is io.github.jmthomasofficial/x402-mcp-server?

JMT x402: 35 pay-per-call Base/USDC tools for agents, auto-paid via x402 v2. No API key.

How do I install io.github.jmthomasofficial/x402-mcp-server?

It runs on your machine. In Claude Code: claude mcp add x402-mcp-server -e 'JMT_X402_PRIVATE_KEY=<JMT_X402_PRIVATE_KEY>' -- npx -y @jmthomasofficial/x402-mcp-server@2.0.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.jmthomasofficial/x402-mcp-server need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.jmthomasofficial/x402-mcp-server open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.jmthomasofficial/x402-mcp-server?

It is published by jmthomasofficial. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.