PromptAI.Credit is a platform that enables developers to access frontier AI models by earning credits through watching targeted advertisements during idle agent run times. The service converts the waiting period when an agent task is processing into an opportunity to view a single dev tool advertisement. After the ad is fully viewed and verified server side, the user receives credits that can be applied directly to the token cost of prompts. Supported models include Fable 5, Opus 4.8, and GPT-5.5, and the credits work with any model the user’s IDE supports. The platform integrates with Cursor and Claude Code, allowing the same credit wallet to be used across different environments. An IDE extension detects when an agent run begins and surfaces an opt in earn panel that feels native to the workflow. Users can also install the extension via the command line with “promptai install cursor”. Credits are real money backed, with server side verification and fraud protection ensuring that only fully completed views are counted. Advertisers can run self serve campaigns targeted by stack, geography, and seniority, setting a cost per verified view between $0.05 and $1.00 with monthly budget caps and per campaign spend visibility. Typical use cases involve a developer starting an agent run that takes several minutes. During that idle time, the user opts in to watch a single dev tool advertisement. Once the ad is fully viewed and verified, credits are added to the wallet and automatically applied to the next prompt’s token cost, resulting in a zero dollar receipt. The system is designed to avoid interruptions or forced ads, and the credits can be spent on any supported model. The platform is accessible through the Cursor Extensions panel or by searching for “promptai.credit”.