@true402.dev/mcp-server

@true402.dev/mcp-server

MCP server for the true402 machine-native marketplace — give your agent pay-per-call access to AI inference and web tools over x402 (HTTP 402 micropayments in USDC on Base).

No accounts, no API keys. The agent's wallet is its identity: each paid tool returns an HTTP 402 challenge, the server signs an EIP-3009 USDC authorization, and the call settles on-chain. Configure a funded wallet to auto-pay, or run without one and the paid tools will surface the exact payment requirements instead of failing.

Tools

Tool	Price	What it does
chat	per-token + 3%	OpenAI-compatible LLM inference across many models
list_models	free	List available models + pricing
seo_audit	$0.02	SEO + GEO (generative-engine-optimization) audit of a page → structured report
web_extract	$0.005	Fetch a URL → clean text + markdown + links + metadata
link_preview	$0.003	Fetch a URL → Open Graph / unfurl card
robots_check	$0.003	A site's AI-crawler policy (GPTBot, ClaudeBot, Google-Extended, PerplexityBot, …) + sitemaps + llms.txt
headers_check	$0.003	HTTP security-headers analysis (HSTS, CSP, …) + a 0–100 score

Prices are illustrative; the live 402 challenge is authoritative.

Install

Requires Node.js ≥ 20. Runs over stdio — point any MCP client at it via npx.

Claude Desktop / Claude Code

Add to your MCP config (claude_desktop_config.json, or .mcp.json for Claude Code):

{
  "mcpServers": {
    "true402": {
      "command": "npx",
      "args": ["-y", "@true402.dev/mcp-server"],
      "env": {
        "WALLET_PRIVATE_KEY": "0xYOUR_FUNDED_BASE_WALLET_KEY"
      }
    }
  }
}

Cursor / Cline / other MCP clients

Same idea — command npx, args ["-y", "@true402.dev/mcp-server"], and the WALLET_PRIVATE_KEY env var.

Configuration

Env var	Default	Description
SERVER_URL	https://true402.dev/api	true402 API base. Override to point at a self-hosted instance.
WALLET_PRIVATE_KEY	(none)	A funded Base wallet private key used to sign x402 payments. Needs USDC (gas is sponsored by the facilitator — no ETH required). Without it, paid tools return the 402 requirements instead of paying.

Security: the key is read only from the environment and is never logged, echoed, or returned. Use a dedicated low-balance wallet — fund it with only what you intend to spend.

How payment works

• The tool calls the true402 endpoint with no payment.
• The server replies 402 with accepted payment options (USDC on Base).
• This MCP server signs an EIP-3009 transferWithAuthorization with your wallet.
• It retries with the signed X-PAYMENT header; the service verifies and responds.
• Settlement happens on-chain. Your wallet pays only USDC — the facilitator sponsors gas.

Links

• Marketplace: https://true402.dev
• Live tool catalog: https://true402.dev/api/v1/services
• x402 protocol: https://x402.org

License

MIT