Frequently Asked Questions

x402 is the open payment protocol built on HTTP 402 by Coinbase and Cloudflare. It lets AI agents pay for API calls, data, and services with USDC stablecoins — instantly, programmatically, no accounts needed. All x402 transactions settle in USDC on chains like Base and Solana. The protocol has processed 100M+ payment flows and is backed by Google, Vercel, Stripe, and Visa. If you run an API or agent platform, x402 support is becoming table stakes.

Model Context Protocol (MCP) is the standard for connecting AI agents to external tools and data. An MCP server exposes your systems — databases, APIs, business logic — to agents like Claude and GPT with structured context and permissions. The MCP server market is projected at $10.4B by 2026. I build custom MCP servers with optional x402 payment gating.

x402 integrations: $25-50K. MCP server builds: $15-30K. Architecture advisory: $10-20K. Every project gets a fixed-price proposal within 48 hours of our discovery call. 50% upfront, 50% on delivery. We accept USD wire or USDC.

A full x402 MCP server with agent payment capability. An x402 facilitator with EIP-712 signature verification and ERC-2612 gasless USDC permit flow. A production Perplexity-style cascade demo — User pays Perplexity $0.01 USDC, Perplexity pays Bloomberg $0.002 USDC, 80% margin — with real USDC settlement on Base mainnet. Multi-chain USDC support across Base and Solana. Open source at github.com/stablecoinxyz/x402-radius-research.

Agencies staff your project with junior engineers learning x402 on your dime. I've already built the stack, know the V2 migration path, and track every protocol update. You get depth, not headcount. Most projects deliver in 2-6 weeks.

Both. I've built USDC settlement infrastructure on Base, Solana, and EVM chains for crypto-native clients, and I understand enterprise requirements — compliance, security, multi-protocol support. Good Meta Limited (Hong Kong) accepts payment in USD or USDC, and I use USDC for cross-border settlement with global clients — the same stablecoin rails I build for production systems.

Yes. The agentic payment landscape changes monthly — x402 Foundation announcements, Google AP2 extensions, Visa Agent Pay, Stripe ACP, Mastercard Agent Pay. I track all of it. Many companies will need multi-protocol support. I help you architect for that from day one instead of rebuilding later.