On 2026-05-19 Base launched mcp.base.org — their official MCP server that connects your Base Account (the Coinbase smart wallet you use in Base App) to Claude, ChatGPT, and Cursor. One of its launch features: "Pay for x402-enabled services".
APIbase has been x402-native on Base mainnet since 2026-05-01. The two pair side-by-side with zero code changes on either side. This post walks through what that means for your agent in practice.
The pairing in one paragraph
Add both MCP servers to your AI client config. Base MCP handles wallet auth + payment signing (your Base Account pops up when an agent wants to spend USDC). APIbase serves 618 paid API tools across 191 providers — flights, stock quotes, weather, jobs, music, chess, EV charging, food safety, government docs, you name it. When your agent calls a paid APIbase tool, our 402 response returns an x402 challenge; Base MCP signs it from your Base Account; we settle it on-chain through our self-hosted facilitator. The agent never touches API keys, the user never opens a separate wallet.
Config: two servers, side-by-side
