Pay-Per-Call MCP with x402 (USDC on Base)

The x402 endpoint lets autonomous AI agents pay per call in USDC on Base — no account, no API key, no subscription. It exposes SelfLabbs security tools behind the x402 payment protocol at about $0.002 per call, settled on Base mainnet.

Paid tools

• cve_lookup — CVE lookup, $0.002/call
• package_vulnerabilities — package vulns, $0.002/call

Machine-readable discovery catalog: /discovery.

Install

claude mcp add --transport http selflabbs-x402 https://x402.selflabbs.com/mcp

Free tier on every server. Pro $19/mo unlocks unlimited, up to 5 seats across all SelfLabbs servers with one key. See pricing.

Open endpoint: https://x402.selflabbs.com/mcp

Part of SelfLabbs — keyless MCP servers for AI agents.