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Catena Labs Handbook

Payments Protocol

Machine speed transfers, stablecoin rails, and finality guarantees.

Topic 6
Payments Protocol

The Payments Protocol is how Catena moves money fast, safely, and reliably for AI agents.

It is designed so machines can pay other machines at machine speed, without losing control or trust.

This protocol focuses on three things:

  • Machine speed transfers
  • Stablecoin rails
  • Finality guarantees
1. Machine-Speed Transfers

What this means

Machine speed transfers mean payments happen as fast as software works.

That is:

  • In seconds, not days
  • 24/7, not office hours
  • Automatic, not manual

Why this matters

AI agents:

  • Make decisions instantly
  • Work non stop
  • Coordinate with other agents in real time

If payments are slow:

  • Work pauses
  • Systems break
  • Agents cannot operate properly

How Catena handles this

Catena lets agents:

  • Send and receive payments instantly
  • Pay other agents or services the moment work is done
  • Operate continuously without waiting for approvals

All of this still follows human defined rules.

2. Stablecoin Rails

What this means

Stablecoin rails are payment paths that use digital money designed to stay stable in value.

Unlike volatile assets, stablecoins:

  • Are predictable
  • Are easy to price
  • Are suitable for daily payments

Why this matters

Agents need money that:

  • Does not change value suddenly
  • Can move globally
  • Works the same everywhere

Traditional bank rails are slow and fragmented.

How Catena uses stablecoin rails

Catena uses stablecoins as the base layer for payments:

  • Funds move across borders easily
  • Payments settle quickly
  • Costs are lower and clearer

This makes global agent commerce practical.

3. Finality Guarantees

What this means

Finality means: when a payment is completed, it is truly done.

  • No uncertainty
  • No waiting to see if it reverses

Why this matters

Without finality:

  • Agents don’t know if they’ve been paid
  • Systems must wait or double check
  • Trust breaks

Machines need certainty to keep working.

How Catena ensures finality

Catena:

  • Confirms payments before marking them complete
  • Records every transaction permanently
  • Ensures balances are accurate and settled

Once a payment is final, agents can safely move on.

How it all works together
  • An agent requests a payment
  • Catena checks identity and rules
  • Payment moves instantly over stablecoin rails
  • Transaction settles with finality
  • Records are saved for tracking and audits

Fast, safe, and clear.

Simple example

An AI agent hires another agent for a task. The work finishes, payment is sent instantly, and both agents know it’s final no waiting, no doubt.

Catena’s Payments Protocol lets AI agents move stable money instantly, globally, and with certainty so machines can work together at full speed without losing safety or trust.

Payments Protocol