claude mcp add --transport http add-tools https://add.tools/mcp
Agents are as powerful as the tools they can access.
With tens of thousands of tools and growing, finding the right and trustworthy tool is hard. We index and rank tools via our own ToolRank algorithm, using public and private data.
Open APIs and public endpoints that your agent can call at no cost.
APIs that accept micropayments via the x402 protocol — the HTTP 402 status code brought to life. Your agent pays per call with stablecoin. No API keys, no subscriptions, no human in the loop.
Our index is constantly expanding as new tools and APIs are discovered.