ECO
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

ECO · Proof of Planet turns verified climate action into money people can audit, all on WhatsApp, in any language. Bitcoin is mined with electricity; ECOIN is minted by Proof of Planet: every ECOIN is minted by a verified climate action, and that action is what backs it. What existed before: ECO, our climate startup in Nairobi, and its earlier climate-action app. Everything in this submission was built during the hackathon (from Oct 26, 2026); none of the earlier app's code is in the repository. The problem: climate action happens every day but is unverified, the people doing it are rarely paid (1.4 billion adults have no bank account, World Bank Findex 2021), and climate waste such as plastic jerrycans or cow dung has buyers but no simple, trusted market. What it does, on WhatsApp: - Earn (Witness): plant a tree or clean up a place and send a photo and location. SAM 3.1 counts what matters, Muse Spark 1.3 answers fixed questions, and fixed rules decide: verified, needs better evidence, or contradicted. Only a verified action mints ECOIN, and each coin links to its public Evidence File. - Photo scout: send a photo with no words. Muse Spark identifies it and rules route it: litter opens a cleanup claim; cow dung or jerrycans become an offer to buyers. The scout never lists, prices or pays. - Trade (Loop, person to person): the seller photographs the lot with a one-time code on paper. Meta AI grades it and every buyer gets a WhatsApp message with the photo. The buyer sets the price, never the AI; its ECOIN is locked in escrow for that one trade, and the seller is paid only for what the buyer physically counts and accepts. - Adopt: a company pays the planter of a verified tree a fixed 200 ECOIN. Existing ECOIN moves; nothing is minted. - Proof: after every verified action, payment or adoption, WhatsApp sends links to the Evidence File, a Proof Card painted by Muse Image (figures from the ledger, never the AI), the public ledger and Atlas. - Fund (Atlas): a map and funder brief written by Muse Spark Open from public numbers. - Audit: anyone can verify the whole hash-chained ledger in a browser. Design rule: the AI can look and talk; only rules move money. The same ledger rules run in TypeScript and in SQL (transfers sum to zero, no overdrafts, escrow tracked per trade). 89 offline tests run on every push. Honest limits: ECOIN here is a test ledger, and business top-ups are labelled demo-only. WhatsApp runs on Meta's test number (5 registered phones), so judges can try the same agent on the website. Our Ghost Audit attacked our own checks with Muse Image: 8 of 12 fakes were blocked, and we published the 4 that got through and what limits the damage. Demo participants are the ECO team. Try it: https://paulmalik431-ctrl.github.io/proof-of-planet/try.html