Between "my API returns 402" and "money settled" sits real infrastructure. Facilitators verify and settle payments so your server never touches on-chain logic. Agent wallets hold funds with per-call limits and daily caps so an autonomous agent can pay safely. Client libraries and SDKs hide the handshake, and micropayment tooling meters usage down to fractions of a cent.
These categories collect the picks-and-shovels of the agent-payments stack — the projects you integrate once and build on for years.
