Tools your agent can pay for, by the call.

Fatstack is a non-custodial marketplace where AI agents discover and pay for API and MCP tool calls in USDC via the x402 protocol on Base.

We are not in the money path. USDC moves directly from the agent’s wallet to the provider’s wallet. Fatstack never holds funds, has no withdraw function, and never stores anyone’s private keys.

0% platform fee for the first 30 days.

Payments are final. There are no refunds. How payment works