backend grok-cli (SuperGrok Heavy sub, $0 marginal) · window last 24h
Celo Agentic Payments & DeFAI - live now; submission deadline CHANGED → 2026-08-10 09:00 GMT (was Aug 3) - $5k CELO (4 tracks) - remote - leaderboard tracks need early register/attribution; more time for India solo agent/x402 builds - x.com/CeloDevs/status/2083185184539853242 · Notion: celoplatform.notion.site/Agentic-Payments-DeFAI-Hackathon-36
Proof of Usefulness Hackathon (HackerNoon) - Jan 5–Aug 10, 2026 (final publish deadline) - $12k cash + $106k credits ($118k remaining of $150k+) - remote/global - real shipped products scored on utility/traction; fits solo India builders with live apps/agents - proofofusefulness.com/ · hackernoon.com/$118k-is-still-up-for-grabs-but-the-proof-of-
Delphi: Agent Arena Competition (Gensyn) - pre-reg open; markets/trading ~Aug 10–23/24 - $10k ($5k/$3k/$2k by P&L) - virtual - DATE CONFLICT: DoraHacks deadline card 2026-08-23 vs detail narrative trading close Aug 24 → use earlier Aug 23; agent trading on prediction markets, no GitHub BUIDL required - dorahacks.io/hackathon/delphi-agent-competition
Ready, Spec, Ship Hackathon (Kiro) - announced 2026-08-01; submission 2026-08-23; winners Sep 6 - ~$9.6k ($5k + $1k cash + Kiro Pro Max) - remote - solo or ≤3; build with Kiro (spec-driven AI IDE) - host: x.com/johncrickett/status/2083575986789261327
Skipped (not ranked): Brainwave 2026 (students-only) brainwaves.devpost.com/ · NTU InnovateX (Singapore IRL) · Evorozen Apex (API credits only) · IITM Research Agents ($100) · MunichTech (vague corporate prizes; sub starts Sep 20)
Major-lab sweep (OpenAI/Anthropic/Google/xAI/Meta, last ~24h): no new lab-run challenges found. Devpost main listings returned JS shell only; known big Devpost items (Gemini XPRIZE, RevenueCat, Cockroach, Backblaze) unchanged. Encode active: Arc/Canton/UXmaxx only. Akindo wave-hacks: empty. ETHGlobal upcoming: ETHOnline / Tokyo / Mumbai only (known).
Re-verify (unchanged — not in DEADLINES_JSON): Agentic Commerce still Aug 2 agentic-commerce.devfolio.co/ · HackerRank Orchestrate still ~Aug 2 (24h from Aug 1 08:30 EDT) hackerrank.com/hackerrank-orchestrate-august26 · Backblaze Aug 3 backblaze-generative-media.devpost.com/ · Port Mortem Aug 3 coderesurrection.com/2026 · AMD Aug 6 luma.com/amd-4dhi · Snowflake CoCo prototype Aug 6 (reg end Aug 2) hack2skill.com/event/cococlihack · Push to Prod Aug 8 BLR IRL pushtoprod-india.devfolio.co/overview · BasePaint Aug 8 basepaint.xyz/hack · Arc window still Jul 13–Aug 22 on Arc House (tracked submit Aug 9 not re-confirmed as changed; Encode page empty).