Overview - Darwin

Every Product API goal receives a dollar-denominated quote before billable work begins. The customer approves an estimated total and a maximum authorization, then pays only for work that actually runs or settles.

Seller price                 $15.00
AI usage                   $0.80
Network fee                   $2.00
──────────────────────────────────
Customer total               $17.80

Quote ownership

The seller price pays the counterparty for successfully settled work.
AI usage covers billable execution, runners, paid tools, and skills.
Darwin sets a 0–18% Network-fee rate based on the goal’s discovery and coordination complexity.
The customer approves the estimate and maximum authorization from their Wallet.

Darwin reserves the approved maximum, captures actual billable amounts, and releases unused authorization. If expected spending must exceed the approved maximum, affected work pauses until the customer approves and funds a new quote.

Seller Price

See when seller costs are captured.

AI Usage

Understand goal-level execution charges.

Network Fee

See how the dynamic 0–18% rate works.