Five guides on the same problem from different angles: how to make an API something an agent can discover, call and pay for — and what has to be true before you take money for it.
Learn what an existing API needs before AI agents can discover it, call it, pay for it and handle failures safely without rebuilding the backend.
A practical guide to pricing APIs for AI agents with pay-per-request models, x402, MPP, settlement rules and safe delivery after payment.
Understand what x402, MPP, ACP, AP2 and UCP actually do, where they overlap and how each fits into an agent commerce architecture.
Learn how to price paid MCP tools, collect machine payments with x402 or MPP and handle retries, execution and receipts safely.
Follow the full AI agent payment flow from price discovery and HTTP 402 through settlement, backend execution, delivery and transaction receipts.