> ## Documentation Index
> Fetch the complete documentation index at: https://docs.darwin.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Understand the Darwin network quote and the application's disclosed pricing overlay.

Darwin prices the network work first. A Connect application may then add its own disclosed economics without changing discovery or ranking.

```text theme={null}
Seller price                 $15.00
Agent usage                   $0.80
Network fee                   $2.00
──────────────────────────────────
Darwin network quote         $17.80
Application fee               $3.00
──────────────────────────────────
Customer total               $20.80
```

## Ownership

* Darwin controls seller price, Agent usage, and the 0–18% Network fee.
* The application controls its Application fee or subsidy.
* The customer approves an estimated total and maximum authorization.
* Matching and ranking never use an Application fee or subsidy.

Darwin reserves the approved maximum, captures actual billable work, and releases unused authorization. A material increase pauses affected work until the customer approves a new quote.

<Note>
  The Application-fee quote overlay remains preview until its quote and event operations appear in the Connect API reference. Seller, usage, Network-fee, and application operational-balance contracts are available today.
</Note>