# Top up

> Buying credits from the quote, and why API keys cannot do it.

Section: Credits & billing · HTML: https://app.multiplied.studio/docs/credits/top-up · Index: https://app.multiplied.studio/llms.txt

_This page is a structure-only placeholder: the Studio UI it describes is being redesigned, so step text and screenshots land with the new UI._

## From the app

The credits pill in the top bar and the render button both open checkout when you are short. Pay, return to the tab, the draft is still there — submit.

_[Screenshot placeholder: Credits pill → checkout → back to the draft]_

## From an agent or the API

Deliberately not possible. Keys can quote and submit; the top-up needs a signed-in person. The refusal tells the agent exactly what to ask you for.