You Already Know the APIs. Agents Pay $5K/Month.

You spent years learning the APIs of your company and partners. All that expertise — locked in your day job. Yesterday, Circle changed that. The Agent Marketplace went live. Five hundred tools. Agents paying USDC per request. Build one MCP server. Set a price per call. One penny is the market rate. Top tools earn five hundred a month. Ten tools in your portfolio. Five thousand a month. Recurring. No accounts. No API keys. No billing dashboard. Just agents paying for what you already know. The first MCP tool in every niche owns it. Stripe integrations. Salesforce queries. AWS automations. Internal logic. Solo devs are listing right now. The first in your niche wins it. Drop your tool idea in the comments. Part 2 next week — the build.