Calibrain
Open source project that runs a classification model against crypto perpetual markets on a testnet.
Best Web3 Builds on X
Onchain tools and games with a working URL. Token announcements without a product stay off the list. 67 builds on this page, each with the original post.
railgate
Payment layer for AI agents, with spending limits, human approval, and idempotent payments. Test USDC on Base Sepolia. Open source.
Kilowallet
Lightning wallet. This release updates the Go engine and adds taproot watch-only.
XRPLA
Full XRP Ledger history on one server, a bit over 1 TB instead of tens of terabytes. Install with apt. Open source.
Xemo
Describe an onchain product in one prompt and it ships as a live business, written and deployed in a sandbox, then charged through Stripe and x402.
Keept
Pay-on-delivery escrow for AI agents. The agent holds the payment and releases it when the work arrives. A PayBox plugin.
Stall
A shop you open by chat, so WhatsApp sellers can be found and paid by AI assistants. Built for the PayBox hackathon.
gann
A driving test for AI agents with wallets. Agents get a small budget, deceptive merchants, and prompt injections, then an auditable report. Built for the PayBox hackathon on Base.
Dissent
Bounties on numerical rules for agents. A valid counterexample, proved onchain, pays the reward. Live on Monad.
Stampora
A paid inbox on Arc. A small USDC stamp to message someone, refunded if they reply.
Bitcoin block rings
Live 3D map of every mined Bitcoin block, coiled like Saturn's rings from genesis to now. Opus 5.5 and Three.js.
Jev Trader
Trading bot with Jev. Buy or sell from a price feed, then places orders on Monad via Kuru every 300ms.
controller-sender
Local app that lists ERC-20s stuck in a Cartridge controller and sends them on Starknet.
OpenLaunch
Open-source, zero platform-fee token launchpad. MIT. First-party.
tclk
HTLC and PTLC deal-making for agents that meet in a chat room. Spec, library, and a walkthrough. First-party from Flop Labs.
AuditCode
14-agent security auditing harness in the terminal, rebuilt for Web3 on OpenCode.
xrpl-docs-rag
RAG pipeline that ingests the official XRPL docs so an agent can build against them.
AVM-SDK
Build, compile, test, and deploy Acki Nacki smart contracts in Rust, locally.
Trickshot
Rewatch a Solana trade as a play, not a PnL card. Drawdowns, green candles, the hold. Built on Helius over a weekend.
kcc20-forensics
Toolkit for public Kaspa transactions, covenants, KCC20 tokens, AMMs, holders, and wallet relationships.
FOMO wallet resolver
FOMO handle to SOL + EVM wallet, local UI and CLI, no signing or paid API.
ssx-valuation
Open-sourced valuation engine behind Mirai Trade: the vAMM math that prices a club rep.
BaseQuest
BasePaint gallery as puzzles, quests, achievements and profiles. Hackathon build.
Avalanche Snowman demo
Play as a validator: ask peers red or blue, watch consensus snowball.
Solana indexer
Production Solana indexer in Rust: Yellowstone gRPC, gap backfill, whale alerts.
Treasury Copilot
Agents get limited USDC spend via MetaMask permission, GenLayer policy, 1Shot execution. No custody.
Alpha Watch
Crypto prices, charts, portfolio, news, simulated trades, watchlist.
ProofFlow
Onchain contractor payments: agreement, evidence, approval, settlement. Repo plus demo.
Sato Live Dashboard
Realtime, open, censorship-resistant community dashboard.
ether.fi Aave v4 dashboard
Stats for the ether.fi Aave v4 deployment on Optimism.
Kaito Pulse
Browser extension that pulls Polymarket, Hyperliquid and other off-platform activity into the X timeline.
TradeReceipt
PnL analytics for Hyperliquid, Lighter and any CEX. Break-even win rate, luck vs skill, losing-streak cost. Paste an address or upload a CSV.
Stonkbroker 6551 Wallet Lookup
Tool inside AGNT that looks up any Stonkbroker NFT and shows exactly what is held in its tokenbound wallet.
b3t Protocol Launchpad
A custom token launchpad paired with a Claude pipeline that turns study notes into textbook-style blog posts.
HOLE CARD
Degen blackjack where every card is a real lottery ticket, with the jackpot at $226k. Built for the Inco Network and Megapot summer game jam.
LOOPTERNITY
Vertical endless survival game on Base with encrypted scores and a weekly prize pool. Built for the Inco Network summer game jam.
AZIMUTH
A daily onchain treasure hunt on Base, played like Wordle: an 11x11 map, encrypted distance feedback and six digs a day.
AccWorth
Vibe-coded X account-worth calculator: estimated value, rate per post, and real crypto follower count from your social score.
Xerper
Enter an X username and a project name, see how many impressions you generated for it. No OAuth.
AgentLayer /cards
Skill that lets your Claude agent get a real payment card (US or international) and spend via x402 + USDC.
Corvo Edge
Chat interface that lets you trade across five different chains from one conversation.
YOTS – Grok-based Agent
Persistent Grok-based AI agent with its own wallet, identity and ongoing lore around the “Year of the Singularity”.
Beldex MNApps
Privacy-focused web apps hosted on .bdx domains with onion routing so neither host nor visitor location is exposed.
Onchain Prediction Market on Canopy
Complete prediction market (markets, shares, resolution, frontend) vibe-coded with Claude and launched as its own virtual chain in 21 minutes.
Canopy Sovereign Chains
Platform that lets developers vibe-code full onchain apps and launch them as their own virtual chains with shared security.
Mechanicus Agent Framework
Agent framework designed to automate migration of enterprises to open SaaS running on ICP cloud engines.
Variational Points Calculator
Browser-only free tool that shows the real cost of points including funding and hold time.
Picks – Solana Prediction Market
Prediction market on Solana where users can create their own markets.
Rialto – Onchain Spot Exchange
Onchain exchange for trading crypto, equities, ETFs and commodities.
x402 Agentic Payment Modal
Drop-in payment modal that lets any agent or endpoint accept micropayments using the x402 protocol.
