The brief
Apps that remember
Walrus Memory keeps scores, preferences, and reasoning across sessions. Your product gets sharper every week, not every login.
13 Oct to 3 Nov 2026Online globally$4,000 prize pool
Hackathon
Total Recall
Get your memory back. Build apps that learn on Mars time.
3 tracks · $1k each◆Walrus Memory on Mainnet◆ai.tatum.io◆Web2 builders welcome◆Online globally◆Apps that learn over time◆
3 tracks · $1k each◆Walrus Memory on Mainnet◆ai.tatum.io◆Web2 builders welcome◆Online globally◆Apps that learn over time◆
Mission briefing
Welcome to the colony.
Who it's for
Web2 welcome
Product people, AI builders, sports fans, fintech tinkerers. If you can ship a demo, you belong here.
Under the hood
Real stack
Memory on Mainnet. Tatum RPC when you need onchain data. AI Builder if you want a one prompt head start.
Three tracks
Pick your sector.
Per track
$1,000
01
Markets & Sports Prediction
Build a prediction app for sports, elections, culture, or markets. Compare bookmaker odds with onchain sources. Track which voices were right. Users log picks before events. Memory stores credibility scores so the app learns who to trust.
Best fit for
Fantasy leagues, sports fans, forecasters, and teams building consumer apps first.
- ▸Sports companion that learns your leagues and trusted analysts
- ▸Odds dashboards that flag when sources disagree
- ▸Pick journals with post game scorecards
Track prizes
1st$500
2nd$300
3rd$200
Special awards
Craft bonuses on top.
Best Walrus Memory
$500
Deepest learning loop. Memories that visibly change the product.
Best Tatum AI Builder app
$500
Best shippable product built primarily with ai.tatum.io.
Submission checklist
What to deliver.
- 01Walrus Memory integrated and writing on Mainnet
- 02Tatum RPC used for onchain data where relevant
- 03At least 10 memories stored on Mainnet
- 04Published blog post: what it does, how it uses Tatum + Walrus, how it learned over time
- 05Working demo and public repo
Timeline
Mission clock.
13 Oct
Launch + build starts
Registration opens. Discord office hours go live.
13 Oct to 3 Nov
Build window
Three weeks to ship with Mainnet memory writes.
3 Nov
Submissions close
Repo, demo, and blog post due 17:00 UTC.
4 to 10 Nov
Judging
Same criteria across AI Builder and indie builds.
11 Nov
Winners announced
Results shared publicly with partners and community.
FAQ
Before you launch.
Solo builders or teams. Crypto native or not. If you can ship a demo in three weeks, you are in.
No. It is one path with its own $500 award. Indie builds compete on the same track prizes.
Mainnet Walrus Memory (10+ writes), Tatum RPC where relevant, blog post, demo, and repo.
They suggest direction. Execution beats novelty. Do not copy the brief verbatim.
Fully online and open globally.
Yes if the submitted work is new progress during the build window.
Ready to build?
13 Oct to 3 Nov 2026 · 3 tracks · $4,000
Three weeks. Three tracks. Ship something that remembers you. Walrus Memory stores the learning. Tatum powers the data. No crypto degree required.
Paths into Tatum & Walrus