Personal finance and investing
Crypto wallets and payment tools
Hobby and indie crypto products spanning self-custody wallets, non-custodial merchant payment gateways, portfolio and wallet trackers, airdrop guides, AI-agent payment rails, and novelty on-chain apps for crypto holders, merchants and developers.
Built for: Crypto holders, merchants, and web3 developers
Projects since May 04
96
Different builders
93
Last 4 weeks vs 8 before
▼ -21%
AI is the core
7.3%
Projects per week
Mostly web app (52%), mobile app (12%), api or backend service (10%) · from r/SideProject, r/vibecoding, r/SaaS, r/IMadeThis
Latest
- larpd — Lets people pay SOL to appear on a public leaderboard ranked by amount sent, read from the Solana blockchain.“I built the dumbest website on the internet: you pay SOL to be on a list. That's it.”
- binance-pay-saas-starter — Provides a Next.js and Express starter kit that accepts Binance Pay crypto payments and issues license keys after payment.“I got tired of Stripe's 3.5% fees and 7-day payout holds, so I built an open-source Next.js 14 boilerplate with Binance Pay (0% fees, instant USDT)”
- tx.taxi — Visualizes transactions and mempools across multiple blockchains in a mempool.space-style interface.“i made my own multi-chain mempool.space fork.”
- Lets users verify sources collectively, cite them by code with live verification status, and build shared graphs of connections such as ownership and payments.“A platform where people verify sources together and turn them into connection graphs”
- HostDeFi — Sells pay-per-call blockchain RPC access across 82 chains, scans tokens for risk signals, and offers a Telegram trading bot for Solana-family tokens.“HostDeFi — x402 pay-per-call RPC across 82 chains, plus a token scanner and a Telegram trading bot”
- Pattivo — Escrows USDC against agreed milestones so a client can fund stages that pay out, refund, or split under pre-set settlement rules with an optional named arbitrator.“We built Pattivo for milestone payments between clients and contractors”
- DexLadder — Offers a paper-only browser practice desk where users work through simulated crypto scenarios with a paper account and learn cost and slippage without a wallet.“I built a local-first crypto practice desk with paper money”
- Accepts crypto payments on multiple chains by deriving receiving addresses from a merchant's xPub so no private keys sit on the server.“Built a non-custodial crypto payment gateway so merchants don't have to trust a middleman with their funds”
- CriptoBid — Ranks user-submitted URLs publicly by bid amount paid in crypto, with on-chain payment verification.“I built a ranking where visibility is bought with USDT, not decided by an algorithm”
- PulseWire Suite — Bundles seven browser-based utilities for crypto trading, file delivery, freelance leads, AI prompts, webhook debugging, and web analytics.“I built a suite of 7 zero-dependency web tools for crypto traders & devs (100% in-browser, no signup needed)”
- Denshin — Turns on-chain DeFi actions across several networks into quests that unlock quarters of a city map.“I built a Web3 quest game where your progress is a city you open”
- Veyrnox — Provides a mobile crypto wallet that generates and uses keys on-device, hides the seed phrase from normal use, and adds plain-language checks before risky actions.“I built Veyrnox — a self-custody wallet focused on reducing seed phrase risk”
- Timbro — Provides verifiable identity, escrow-style payment holds, portable reputation, and third-party arbitration so AI agents can transact with strangers.“The moment your AI agent needs to pay a stranger 400 bucks, autonomy ends. You're approving it by hand like it's 1998.”
- d2index — Streams unconfirmed Bitcoin transactions live and highlights those touching known wallets such as exchanges, sanctioned addresses, and mining pools.“I built a live Bitcoin tracker that visualizes interesting transactions: exchange inflows/outflows, US Treasury sanctioned addresses, mining pool payouts”
- Paybyte Blockchain Engine — Runs a proof-of-participation Layer 1 blockchain that lets merchants accept a native crypto payment with a signed payment reference, similar to a pay-with-PayPal button.“Crypto Commerce Project - Paybyte”
- Sui INTERAX Scanner (GLE-OS) — Traces Sui blockchain transactions from mainnet data and generates sealed, verifiable forensic reports for submission to exchanges and authorities.“Crypto recovery is broken. I built an enterprise mobile forensic scanner for the Sui network to fight back.”
- CRUX — Runs a Bitcoin-style proof-of-work blockchain whose ledger is stored in a GitHub repository and whose blocks are mined by solving a subset-sum knapsack.“I built a Bitcoin-like chain whose canonical ledger is a GitHub README”
- Tula — Shows a user's holdings across DeFi and payment venues like HyperLiquid, Aave and Stripe in one terminal interface, with an agent-style chat for querying them.“[New Project] Tula - Your true exposure, what breaks first, and more, across every venue at once”
- RULR — Lets users claim a country-themed public status for a URL or social handle by paying on-chain, shown on a shared country map.“I built RULR: a public, on-chain country-throne game for web3 communities — looking for candid feedback”
- Dropasol — Lets users make a wish and send a Solana coin down a animated virtual well, then shows their confirmed transaction number.“I built a wishing well on Solana. You drop a coin in, watch it fall, and then nothing happens.”
Most discussed
- printme.money — Hosts a set of novelty web toys that visualize money, such as a salary printing in real time or savings melting at inflation rates.“i built printme.money, a site of useless money toys. you can watch your salary print or your savings melt”
- CriptoBid — Ranks user-submitted URLs publicly by bid amount paid in crypto, with on-chain payment verification.“I built a ranking where visibility is bought with USDT, not decided by an algorithm”
- Stakr — Tracks a user's crypto portfolio holdings on-device without accounts or exchange connections.“Spent about 8 months building a crypto portfolio tracker as a solo dev.”
- AI agent credit score — Computes on-chain credit scores and limits for AI agents from their verified task history, letting them draw and repay credit on testnet.“I built AI agents a credit score — they earn real on-chain credit lines from actually-verified work”
- TopCryptoCards — Compares 84 crypto cards across five European markets in five languages.“I vibe coded a multilingual fintech site with 500+ pages. Here's what that actually looks like at scale.”
- Agaemon — Sits between AI agents and blockchain, checking each requested transaction against a policy before executing it.“AI agents can execute transactions. But who controls what they’re allowed to do?”
- RICE Pay — Sends USDC on the Base network through a non-custodial mobile app with saved recipients and capped fees.“Looking for USDC/Base users to test RICE Pay on iOS and Android”
- Sui INTERAX Scanner (GLE-OS) — Traces Sui blockchain transactions from mainnet data and generates sealed, verifiable forensic reports for submission to exchanges and authorities.“Crypto recovery is broken. I built an enterprise mobile forensic scanner for the Sui network to fight back.”
- IWANNABERICH — Publicly displays a running total of real donations received via Ko-fi as a wealth counter toward a billionaire goal.“I built a website to see if I can actually become a billionaire from 0.”
- Budgetmo — Lets people send and request money in a Venmo-style interface where payments are tied to a city's budget.“I cloned Venmo, but it is your city's budget”