Anthropic Claude Code Hackathon Madrid: Close the Books

About this hackathon

A one-day Claude Code build day in Madrid on Sat, Nov 7, 2026 (9 AM–9 PM, La Nave), part of the Claude Community events. Build an autonomous AI finance team that closes the books for a synthetic multi-entity company—invoices, POs, bank transactions, contracts and ERP history—safely and with an audit trail. A live leaderboard scores accounting accuracy, reconciliation, fraud detection, safe autonomy and auditability, with a hidden benchmark deciding the final. Challenge by Talky with UCM's competitive programming association; about 70 seats; apply individually and get placed in teams.

Status
Deadline: 2026-11-07
Starts: 2026-11-07
Who: Open to all (Apply and get reviewed individually; teams are assigned; about 70 seats)
Level: Advanced
Prize: Prizes not stated on the event page
Size: ~70 people
Format: In person · 马德里 · International
Location: 马德里

Original listing (Chinese)

The full original listing below is in Chinese, as published in the Hack123 newsletter.

一句话简介：Claude 社区在马德里办的 Claude Code 一日黑客松，⁠‍‌‍‍‍‍‌‌‌‌‍‍‍‌‌‌‌‍‌‍‍‌‍‍⁠用 Claude Code 搭一支 AI 财务团队，让它把一家虚拟集团公司的账「结」掉。

看点：每队拿到同一套合成数据——多主体公司的发票、采购单、银行流水、合同、供应商资料、总账和 ERP 历史，里面埋了重复单、税务错误和可疑的银行信息变更；实时排行榜按记账准确率、对账、欺诈识别、安全自主和可审计性打分，最终由隐藏基准决定；题目和数据由会计 AI 公司 Talky 与马德里康普顿斯大学竞赛编程协会设计；个人申请审核后分队，约 70 个名额，管饭

奖金：官方页未写奖金

截止日期：11 月 7 日（活动当天，马德里线下）

活动日期：2026年11月7日 9:00—21:00（马德里时间；北京时间 16:00—次日 4:00，La Nave）

Summarized from the organizer’s page and public posts. Please confirm details on the official site before registering.

Anthropic Claude Code Hackathon Madrid: Close the Books

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Original listing (Chinese)