JSON Validator API MCP Server: Install & Setup

Install JSON Validator API in Claude Code

Claude Code

claude mcp add --transport sse json-validator-api https://json-validator.api.klymax402.com/mcp

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

{
  "mcpServers": {
    "json-validator-api": {
      "url": "https://json-validator.api.klymax402.com/mcp"
    }
  }
}

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

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

Remote. Hosted by the provider. You connect with a URL, nothing to install.

Run: claude mcp add --transport sse json-validator-api https://json-validator.api.klymax402.com/mcp

middlefieldgs/JupiterInvoice

Create and manage invoices and customers on Jupiter Invoice (MCP, API-key auth).

kodandy/jp-m2m-mcp

Raw Japanese regulatory data for AI agents: pension, gazette, gBizINFO. x402-metered (USDC).

Br0ski777/jupiter-quotes-x402

Solana swap quotes via Jupiter — best route, price impact, priority fees, USD pricing. x402.

kodandy/jp-crypto-tax-rules-mcp

Machine-readable Japanese crypto-asset tax rules for AI agents: rules-as-code with citations, x402.

middlefieldgs/jupitersignup

List, read, create, and edit JupiterSignup sign-up and payment forms. API key required.

kodandy/jp-biz-opportunity-mcp

Japanese public-sector business opportunities for AI agents: tenders, subsidies, sanctions. x402.