Using Your Claude Subscription in Pi Agent — At Your Own Risk

Using Your Claude Subscription in Pi Agent—At Your Own Risk

If you use Pi and are willing to gamble your Anthropic account, there's a project that allows you to do so, but proceed with caution. A user shared a GitHub repository (https://github.com/spksoft/pi-sub-anthropic) that enables integrating your Claude Pro/Max subscription with Pi agent, but at your own risk.

The project ported the Anthropic provider layer from oh-my-pi into a standalone Pi extension. It registers a second provider—pi-sub-anthropic—while leaving your existing setup intact until you explicitly choose to use it. Installation can be done via pip: `pi install npm:pi-sub-anthropic`.

The extension does not require any runtime dependencies or build steps. It directly speaks the Messages API over fetch, supports nine models, and accepts an API key via PI_SUB_ANTHROPIC_API_KEY. This key represents the sanctioned path for billing, with no fingerprint games.

However, there are significant risks to consider. By mimicking Claude Code's fingerprint, the project presents a third-party client as a first-party one, which may violate Anthropic's Usage Policy and Consumer Terms. Anthropic reserves the right to detect, rate-limit, suspend, or terminate accounts at any time without notice. This project offers no warranty, support, or liability.

The author of the project emphasizes that the interesting work—OAuth flow, wire fingerprint, token clamp, tool naming, and billing attestation—is not their own. They acknowledge the contributions of oh-my-pi and express that this project is not affiliated with Anthropic or Pi. Use the extension at your own risk, and be prepared to lose your Claude subscription account if necessary. The repository and npm package are available for reference.