Arca opens to all, pays users for approved AI sessions

3 min

After invite-only early access, the desktop app from the team behind Brevis is now open to anyone on Mac and Windows.

HONG KONG, November 11, 2026: Arca, a desktop app from the Brevis team, is now publicly available. Arca pays users for AI session histories stored on their computers. It detects existing session logs from supported AI tools, lets users select which sessions to submit, removes sensitive information on-device before upload, and pays for approved submissions. Signups require only an email address, with no invite or waitlist.

AI-powered workflows generate granular session records that include iterations, corrections, and final solutions. These accumulate locally and typically go unused. Arca assigns value to those records.

How it works

Supported tools: Claude Code, Codex, Cursor, and Claude Desktop. After installation, Arca displays discovered past and recent sessions on the user’s machine. Users choose a session to upload, receive a quote range after on-device anonymisation, then either confirm for review or withdraw to delete the pending upload. Approved sessions are paid weekly.

Data handling: Arca reads only local session files and lists all findings. No background uploads occur. Nothing leaves the device until user confirmation. On-device scrubbing removes names, file paths, account details, and keys. Additional anonymisation runs server-side.

Statement from Brevis: Arca enables users to assess session value and decide what to share following an initial limited rollout.

Built for real work in any field

Eligible content spans coding, contract reviews, research, and long-form AI interactions. Sessions with Claude Opus, Fable, and recent GPT models in Codex qualify. Short sessions are ineligible. All submissions undergo review prior to payment. Optional GitHub linking can strengthen user profiles and increase session value.

Arca extends Brevis’s verifiable computing approach: verifiable outputs command higher value than trust-based ones.

Availability

Arca moved from invite-only access that began October 13 to open access. Users can sign up via email or Google and start immediately. The app is free for Mac and Windows at arca.market.

Through November 30, the Arca Launch Challenge adds $10,000 in prizes on top of regular payouts for approved sessions.

About Arca

Arca pays users for otherwise discarded AI session histories by discovering local logs, enabling selective sharing, performing on-device anonymisation, and compensating approved submissions. Built by the team behind Brevis. Learn more at arca.market.

About Brevis

Brevis builds verifiable computing infrastructure. Its zero-knowledge proving technology, including the open-source Pico zkVM, enables applications to prove results of complex computations. Learn more at brevis.network.