x402-gateway-mcp

Enables MCP clients to access all endpoints of an x402 gateway by paying real-time microtransactions (USDC on Base) per API call, with automatic tool discovery and spend guardrails.

→ Marysbrain/x402-gateway-mcp · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 1 credential: WALLET_PRIVATE_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configGATEWAY_URL— "": "https://<your-gateway-host>",

configMAX_PER_CALL_USD— "": "0.25",

configMAX_SESSION_USD— "": "2.00"

🔐 secretWALLET_PRIVATE_KEY— ⚠️ Funded-wallet warning: signs real payments. Use a

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/marysbrain-x402-gateway-mcp-10dd9e)](https://m8ven.ai/mcp/marysbrain-x402-gateway-mcp-10dd9e)

commit: de49c0f89effec65a8365f64b23ddcd928874290

code hash: 3ed3f7903a34fc0a5b3ae904ca1021dd8b711959990a543cec2de0cc92e36744

verified: 7/6/2026, 10:36:31 AM

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