X402 ja API MCP Server: Install & Setup

Install X402 ja API in Claude Code

Claude Code

claude mcp add x402-ja-api -- npx -y ja-normalize-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "x402-ja-api": {
      "command": "npx",
      "args": [
        "-y",
        "ja-normalize-mcp"
      ]
    }
  }
}

Holidays/business days for 200+ countries; Japanese address, name, bank and company normalization.

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

Run: claude mcp add x402-ja-api -- npx -y ja-normalize-mcp

Darkchild88/x402-money-farm-mcp

Pay-per-call web extraction: clean text, metadata, links, JSON-LD, change detection. USDC on Base.

lspain1994/x402

Search five paid x402 government-data APIs (IRS, FDA, SSA, HCAD); full records paid over x402.

cameron4316/x402-oracle-server

Check x402 endpoint reliability on Algorand before an agent routes a payment there.

seob5285-alt/x402-facilitator-proxy

Multi-tenant HTTP 402 infrastructure gateway and stdio MCP server for machine payments.

kaito3636/x402-presign-guard

Pre-sign EVM tx/approval safety for AI agents: decode calldata, flag drainers, return GO/HOLD/BLOCK.

yunaremaia/x402-crypto-mcp

Crypto market data via x402: prices, convert, indicators, yields, gas, tx status, balances, ENS.