Goldbean

This server connects Claude to GoldBean's collection of 402-paid APIs, letting you call services on a pay-per-use basis with USDC payments on the Base network. It's built around the HTTP 402 Payment Required status code concept, where each API call triggers a microtransaction. You'd reach for this when you want to integrate paid external services into your AI workflows without upfront subscriptions or API key management. The payment model works through cryptocurrency, so you'll need a wallet with USDC on Base to make calls. The repository mentions ten different APIs are available, though specifics about which services aren't detailed in the source. Useful if you're building agent systems that need to handle variable API costs programmatically.