I parsed 10 years of Japanese corporate filings into an API
Unlocked Japanese financial data—XBRL parsed to JSON for 11k companies, no signup.
Zero to OneSolve My ProblemBig Brain
dahaleonkar
404mo ago
Finance Projects
Finance and fintech projects from Show HN — trading tools, budgeting apps, payment systems, and crypto.
Every CEO and CFO change at US public companies, live from SEC
Free SEC filing tracker with compensation data that Bloomberg charges for.
Solve My ProblemDark Horse
porsche959
191633mo ago
GitHub
The open-source Stripe, built on stablecoins. Same API and dashboard you already know, minus the fees. Payments infrastructure you actually own.
335TypeScript
●●●Banger
Zoneless – Open-source Stripe Connect clone with $0.002 fees using USDC
Stripe-compatible payouts at $0.002 vs Stripe's $9,400/month burn.
Solve My ProblemBold Bet
tinyprojects
1573mo ago
GitHub
An index tracking realtime GPU rental prices and a perpetual futures marketplace that trades it
1Rust
●●●Banger
GPU Perpetual Futures Prototype
GPU derivatives with real funding rates and mark pricing—fills a genuine infrastructure hedging gap.
Big BrainBold BetWizardry
ozzymandiaz96
935mo ago
GitHub
Vibe Trading — agentic AI trading platform for Indian markets. 7 LLM analyst agents analyze stocks in parallel, debate bull vs bear, and deliver trade plans. Open-source agentic quantitative researcher for NSE/BSE/NFO.
76Python
●●●Banger
Trading harness for Indian stock market
Seven AI agents debate bull-vs-bear before execution—actual architecture, not just API chaining.
WizardryNiche GemBig Brain
Arkid
903mo ago
Sheila, an AI agent that replaced our accounting flow
Real agent in production handling fiat + Bitcoin payments, not a framework demo or vaporware.
Solve My ProblemShip It
knewter
724mo ago
I made a simulator for personal finance (5 year update)
Beam search optimizer saves $300k in lifetime taxes by automating Roth conversions.
Big BrainSolve My ProblemSlick
scubakid
752mo ago
Replacing $50k manual forensic audits with a deterministic .py engine
Treats forensic accounting as a state-machine problem, not an AI problem — genuinely clever.
Big BrainSolve My ProblemDark Horse
cd_mkdir
514mo ago
GitHub
Financial Model Engineering — Python code compiles to live Excel formulas
44Python
●●●Banger
Modeleon – Python DSL that compiles to live Excel formulas
Python code compiles to real Excel formulas with automatic dependency graphs.
Big BrainSolve My Problem
adilkhanovkz
503mo ago
GitHub
Self-hostable personal finance app: Plaid bank sync, budgets, net worth, spending reports
2TypeScript
●●●Banger
PocketLens – free, self-hosted Mint alternative via Plaid
Direct Plaid integration cuts out paid relays like SimpleFIN that Actual Budget requires.
Big BrainSolve My Problem
ashrithanumala
505d ago
GitHub
CCXT for prediction markets. PMXT is a unified API for trading on Polymarket, Kalshi, and more.
1,984TypeScript
●●●Banger
DomeAPI (YC F25) was acquired. pmxt is the open-source equivalent
CCXT for prediction markets—fills real void left by DomeAPI acquisition.
Solve My ProblemDark Horse
SamTinnerholm
405mo ago
MCP server ONLY app for personal finances
MCP-only consumer app proves Claude as a viable UI surface for complex financial workflows.
Zero to OneSlick
bjpless
424mo ago
Poke500 – An S&P 500-style index for the top Pokémon cards
Applying S&P 500 rigor to Pokémon cards is the crossover finance nerds didn't know they needed.
Crowd PleaserNiche Gem
ninjahawk1
409d ago
Micropay – Stripe for Africa's biggest payment network
Stripe for M-Pesa, at 98% lower cost than existing aggregators.
Zero to OneSolve My ProblemBig Brain
possiblelion
305mo ago
SatsAPI – Bitcoin data API, pay per call in sats via Lightning L402
L402 turns Lightning payments into stateless API auth for autonomous agents.
Zero to OneSlickSolve My Problem
Aperezvigoa
334mo ago
GitHub
StripeOnChain is a middleware service that independently monitors blockchain networks to verify on-chain USDC settlement of Stripe stablecoin payments.
4TypeScript
●●●Banger
StripeOnChain – Verify Stripe's stablecoin payments against blockchain
Fills Stripe's blockchain visibility gap with chain-specific finality tracking.
Solve My ProblemBig Brain
techdavepy
304mo ago
Piecely – Content marketplace using dominant assurance contracts
Dominant Assurance Contracts for content: backers get a bonus if the funding goal fails.
Big BrainZero to OneBold Bet
johndebord
303mo ago
I built Pagome – SEPA payment links via GiroCode QR (free, no server)
SEPA links via GiroCode QR with zero servers — why didn't this exist?
Zero to OneSolve My Problem
urbanisierung
322mo ago
ManiDesk – SQL workspace joining market, macro and fundamental analysis
Joins FRED, SEC 13F, and market prices in one SQL query without Python notebooks.
Solve My ProblemSlick
franklin_m
326d ago
Dhan360 – Privacy-first portfolio analytics for Indian investors
Local-first portfolio tracker solving the fragmented Indian brokerage data problem.
Niche GemBig Brain
anirudhgoel
311d ago
A DeFi data API where AI agents pay per call via HTTP 402 micropayments
HTTP 402 finally meets crypto — agents pay micros without auth.
Zero to OneBig BrainSlick
fernsugi
205mo ago
Ditch your budget app subscription. Surebeans is a modern YNAB4
YNAB4 spiritual successor with zero subscription, scraping beats API trap.
Solve My ProblemDark Horse
sltr
245mo ago
I reverse-engineered car lease math against three real dealer documents
Reverse-engineered lease math verified to the cent against three real dealer documents.
Solve My ProblemBig Brain
amirjavid
254mo ago
Open-source personal finance AI that runs locally on your laptop
Beats Mint and YNAB: runs local, estimates taxes, connects AI chat to real data.
Solve My ProblemNiche GemSlick
jfornear
224mo ago
Refund and Arbitration Protocol for Agents
Escrow refunds for failed AI API calls — Austin Griffith and Ethereum Foundation endorse it.
Zero to OneBig BrainSolve My Problem
AliAbdoli
204mo ago
Trade Robinhood from Claude Code – 10 real traders, 60K orders served
5 ladder orders in 1 sentence instead of 50 clicks — 10 users, 60K orders shipped.
Solve My ProblemSlick
teamtrayd
204mo ago
Financial Database API for Vibe Coders
Entity-resolution fixes ticker recycling headaches that break most free financial APIs.
Big BrainNiche Gem
lyonghee97
213mo ago
Filedge – parse SEC filings for $0.05 via x402, no keys
x402 micropayments kill API keys entirely, letting agents pay per parse with zero auth overhead.
Zero to OneDark Horse
arvindravi
203mo ago
See how much gold, plutonium and cocaine SpaceX's Bitcoin buys
Sliding scale from 1 sat to 21M BTC with a working Geiger counter for plutonium.
Rabbit HoleCrowd Pleaser
hmg-ocean
202mo ago
Every site gives a different P/E ratio, so I open-sourced the math
Every formula visible in source when Yahoo Finance and Morningstar hide their calculations.
Big BrainSolve My Problem
JerBouma
201mo ago
LangevinAI – Automated FP&A for Everyone
Turns messy GL exports into P&L reports with AI variance commentary.
Solve My ProblemBig Brain
L_Outsider
2029d ago
QuantumReckon – find your real cloud and AI spend, including tokens
First FinOps tool to quantify idle AI token spend alongside traditional cloud infrastructure costs.
SlickSolve My Problem
ssgonella
2016d ago
Fireplot – I built a take-home pay map to see if I should leave Belgium
Subtracts rent and living costs from net income, unlike standard tax calculators.
Crowd PleaserSolve My ProblemCozy
lotsoworks
2013d ago
MonteSheet – 100k Monte Carlo runs in ~1.9s in Google Sheets
Clones your formula graph to run 100k sims locally when @RISK costs thousands.
Big BrainSolve My Problem
hackiku
208d ago
An open derivatives pricing platform
Stateless C++ QuantLib engine with least-privilege architecture for institutional pricing.
Big BrainNiche Gem
melenaboija
208d ago
I walk-forward tested classic trading setups. Several have no real edge
Brutal random-entry gauntlet proves most 'classic' trading setups have zero real edge.
Big BrainDark Horse
thepromptgenius
207d ago
GitHub
An AI that prices World Cup matches better than the market — and bets real money on the gap. +202%.
0Python
●●●Banger
Reasoning-driven World Cup betting that returned 202% (121 bets)
62-59 record with +202% return proves edge lives in price, not hit rate.
Big BrainBold Bet
cbock90
202d ago
Pre-registered trading backtests – 27 kills, 2 passes, 0 funded
Pre-registered backtests with a body count—27 kills, zero funded.
Big BrainBold Bet
Strawburry
202d ago
Iban.link – A memorable link for your IBAN
Privacy-first IBAN shortener replaces PayPal for European bank transfers—genuinely useful.
Solve My ProblemZero to One
oliverjanssen
105mo ago
Natural language search across Kalshi and Polymarket
Unified NL search across fragmented prediction market APIs; AI-agent-friendly, real-time odds.
Solve My ProblemSlick
helloiamvu
105mo ago
GitHub
A real-time cryptocurrency trading dashboard powered by AI agents with multi-exchange support
15Python
●●●Banger
HashTrade – Open-source LLM trading agent with episodic memory
LLM-as-strategy replaces rigid backtesting, remembers trades, no code rewrites needed.
Big BrainWizardryBold Bet
mertozbas
115mo ago
Deadhand – trustless Bitcoin inheritance in 2 minutes
Trustless dead man's switch for Bitcoin via Shamir SSS, but execution risk and regulatory uncertainty loom.
Zero to OneBig BrainBold Bet
maxcomperatore
105mo ago
Nett – See what you can spend (not your bank balance)
Founder accounting reality check: reveals actual spend vs. bank balance math.
Solve My ProblemShip It
Clutchone2
105mo ago
Panther - Bloomberg Terminal for prediction markets now in early access
Multi-exchange prediction market terminal with arbitrage scanner beats tab-switching chaos.
SlickSolve My Problem
mkelias
105mo ago
Refinance calculator that shows the real net worth impact
Refinance net worth modeling beats payment-only calculators; honest marginal tax and opportunity cost math.
Solve My ProblemDark Horse
brentdrns
104mo ago
Spectra – local finance dashboard with offline ML categorization
Offline-first bank import with ML categorization—real privacy, real product, shipped.
Zero to OneSolve My ProblemNiche Gem
francesco_gab
104mo ago
A low-latency Middle East OSINT feed for trading crude oil
Geopolitical event → oil price correlation data that Bloomberg Terminal doesn't provide.
Dark HorseBig Brain
MelStan
114mo ago
GitHub
AI-powered personal finance transaction categorizer — FastAPI + React + Ollama
3Python
●●●Banger
NumbyAI – Self-hosted personal finance app powered by a local LLM
Local LLM categorizes transactions — your bank data never leaves your machine.
Big BrainSolve My Problem
suheilaaita
104mo ago