Best API monetization AI tools

MPP (Machine Payments Protocol) is an open standard for machine-to-machine payments, enabling agents, apps, and humans to pay for API requests, tool calls, or content within the same HTTP call. It eliminates the need for complex payment integrations and manual API key management.

Ouro is a collaborative platform for technical creators—engineers, scientists, and AI developers—to build, share, and monetize high-impact digital assets. It enables users to publish APIs, datasets, and AI agents, fostering a community focused on solving major challenges and creating passive income streams.

Fewsats is a secure payment infrastructure designed specifically for AI agents. It enables AI to make transactions for services like premium APIs, with complete human oversight, budget controls, and a frictionless experience. It empowers developers to build more capable autonomous agents that can participate in the market economy.