Show HN: Move to dodge the bullets. How long can you survive? https://bit.ly/45eGojJ

Show HN: Move to dodge the bullets. How long can you survive? https://bit.ly/47p0A3A August 12, 2025 at 09:18AM

Show HN: Enter your domain and my open-source agent will hack it https://bit.ly/4mbceDJ

Show HN: Enter your domain and my open-source agent will hack it I built an open-source AI agent for security testing to find and fix vulnerabilities in your code. I’ve noticed how bad security vulnerabilities have gotten with everyone shipping AI code slop, so I wanted to build something that allows for vibe-coding at full speed without compromising security. Traditional security tools aren’t effective, and manual pen-testing can’t keep up with the rapidly growing AI code This tool runs your code dynamically, finds vulnerabilities, and validates them through actual exploitation. You can either run it against your codebase or enter your (or someone else’s) domain to scan for vulnerabilities. Good luck, have fun, hack responsibly! https://bit.ly/4fzyZif August 12, 2025 at 02:06AM

Show HN: Keeps – Mail a postcard that plays your voice https://bit.ly/4onB2dg

Show HN: Keeps – Mail a postcard that plays your voice Hi everyone — I’m Clark, creator of Keeps, a way to send physical postcards that play your voice with a quick QR code scan. WHAT IT IS Upload a photo (or pick from Unsplash), write a message, optionally add a 60 second voice note, and send a 4×6 postcard. QR code printed on the postcard links to a “digital card” that plays the audio. $5 flat, printing + postage included. No account required. WHY I BUILT IT I love mailing postcards to my family but hate it's a hassle (finding card, buying stamp, handwriting, praying it arrives on time). I wanted to merge the charm of physical mail, the warmth of voice messages, and the efficiency of software. HOW IT WORKS Built with Next.js, Supabase, Stripe, Resend, and Lob. QR codes link to hosted audio. Stripe handles payment. Lob prints and mails the cards. Resend emails status updates. WHAT'S DIFFERENT - Voice note + physical card combo - Minimal editor, no sign-up friction - Transparent $5 price (everything included) TRY IT FREE 1. Go to https://bit.ly/45LpmK3 2. Create your card 3. Use promo code SENDKEEPSFREE for a free send (first 50 people) FEEDBACK WANTED - Editor UX - QR/digital card flow - Address autocomplete UX - Critical missing features - Interesting use cases (wedding thank yous, airbnb hosts, etc) Happy to share details or answer questions! https://bit.ly/4oOuDs3 August 12, 2025 at 12:45AM

Show HN: QuotationGenie – Create and Track Quotes, Invoices, and Contracts https://bit.ly/3J7ggyt

Show HN: QuotationGenie – Create and Track Quotes, Invoices, and Contracts With QuotationGenie you can: Create customized quotations in minutes Generate invoices and track payment status (paid, unpaid, overdue) Draft, send, and sign contracts digitally I built this after getting frustrated with juggling multiple tools for quotes, invoicing, and contracts — now it’s all streamlined in one dashboard. Would love your feedback on usability, features, and what you’d want to see next. Thanks for checking it out! https://bit.ly/4ma5OEU August 11, 2025 at 05:17AM

Show HN: A Sinclair ZX81 retro web assembler+simulator https://bit.ly/4frLn3O

Show HN: A Sinclair ZX81 retro web assembler+simulator Lots of fun to do. I would have not taken the time without the speedup provided by Claude. https://bit.ly/47oCINz August 11, 2025 at 01:44AM

Show HN: A reading to remind us to keep raising our voices against oppression https://bit.ly/3UntBFo

Show HN: A reading to remind us to keep raising our voices against oppression https://bit.ly/3Jc1o1H August 10, 2025 at 01:24PM

Show HN: Engineering.fyi – Search across tech engineering blogs in one place https://bit.ly/4mfttUK

Show HN: Engineering.fyi – Search across tech engineering blogs in one place I built a search engine for engineering blogs because I was tired of manually checking individual company blogs to find real-world production examples. The problem: When learning a new technology, the best insights often come from how companies like Google, Meta, or Stripe actually implement it in production. But these gems are scattered across dozens of separate engineering blogs with no way to search across them. What I built: Engineering.fyi indexes engineering blogs from ~15 companies (Google, Meta, OpenAI, Anthropic, Stripe, Uber, etc.) and makes them searchable in one place. You can filter by topic, difficulty level, and whether articles include code samples. Technical details: - Built with Next.js, SQLite, DrizzleORM - Custom scrapers for each blog (they're all frustratingly different) - Basic tagging system using content matching (still improving this) Current status: Core search is working. Adding new blogs weekly as I index them. Next features (based on early feedback): - AI summaries for quick article previews - Weekly digest of trending engineering insights - Save/bookmark articles (considering whether to add accounts) Interesting challenges: - Each blog requires custom parsing logic (no standard format) - Building an accurate tagging system is harder than expected – started with exact matching but exploring better approaches I'd love feedback on: - Which company engineering blogs you'd find most valuable to include - Whether AI summaries would actually be useful or just noise - How you currently discover engineering articles from these companies https://bit.ly/4mdaPwG August 10, 2025 at 02:44PM

Show HN: Play Brainrot Games Online https://bit.ly/3URjoB5

Show HN: Play Brainrot Games Online Brainrot Game is a free-to-play, browser-based hub that serves up instant, meme-fueled mini-games—think Italian sharks in sneakers, Tralalero Tralala remix levels, and Tung Tung Sahur puzzle chaos—all without downloads, logins, or paywalls. Every Brainrot game runs on lightweight HTML5 technology, so you can jump straight into the action on Chromebooks, phones, or PCs at school, work, or home. Updated weekly with new viral characters and trending sound bites, Brainrot Game keeps the dopamine hits coming and the brainrot growing. Is there any other game you want to play? https://bit.ly/4fFqVN1 August 10, 2025 at 10:51AM

Show HN: AI Coloring Pages Generator https://bit.ly/4oufWdb

Show HN: AI Coloring Pages Generator Hey Ycombinator News community! I'm excited to share AI Coloring Pages Generator with you all! As a parent myself, I noticed how hard it was to find fresh, engaging coloring pages that my kids actually wanted to color. So I built this AI-powered tool that lets anyone create custom coloring pages in seconds - just describe what you want and watch the magic happen! Whether it's "unicorn princess," "summer theme," or "cute kittens," the AI generates beautiful, printable coloring pages that are perfect for kids and adults alike. The best part? It's completely free to use! I've already seen families, teachers, and even therapists using it to create personalized activities. There's something special about seeing a child's face light up when they get to color exactly what they imagined. Would love to hear what you think and what kind of coloring pages you'd create! https://bit.ly/3JpSuOc August 10, 2025 at 08:34AM

Show HN: AI feedback on system design diagrams https://bit.ly/4fr4xGZ

Show HN: AI feedback on system design diagrams Hey everyone, I made a tool to practice System Design for technical interviews. I am currently practicing System Design interviews and honestly this is not my forte. Since I am also trying to keep my programming skills sharp and get more products to show off in my portfolio, I thought maybe I could implement a tool that would help people practice this kind of interview as well. It seems most of people preparing for such interviews are using: * videos of recorded practice interviews * books (especially Designing Data-Intensive Applications) * mock interviews with FAANG engineers ($$) The goal of this tool is to provide a whiteboard to the user, then use AI (Gemini) to assess the user submission with respect to some metadata about the problem that guide the LLM about what a good solution should look like. Not selling anything, there is no paywall, no login, not asking for email etc. For now, I'm just trying to see if someone else finds this useful, and if this idea got legs. If it doesn't I would open-source it (code needs some cleaning). Hope someone finds this useful: https://bit.ly/4lkDC0X Any feedback is appreciated! PS: There are a few bugs that I am working on, noticeably the anchoring of edges can be buggy at times but this is only a display issue. PPS: Right now, it's using Gemini free tier. https://bit.ly/4lkDC0X August 9, 2025 at 08:45AM

Show HN: Keywords for Self-Talk https://bit.ly/4otknoA

Show HN: Keywords for Self-Talk https://bit.ly/46OG2Bn August 9, 2025 at 08:29AM

Show HN: I made a safe anonymous message app https://bit.ly/4fueRxV

Show HN: I made a safe anonymous message app Subrosa is an anonymous message-sharing platform where anyone can visit your unique link and write whatever’s on their mind: secret confessions, honest thoughts, or wild opinions, completely anonymously. You get to read what people say about you on your personal dashboard. What sets this apart is the AI-powered moderation that filters out hate speech, abuse, and spam before it ever reaches you, creating a safe space for honesty without toxicity. This is an alpha release with a basic UI as we focus on testing core functionality. Try it out, share your link, and experience raw, honest, and clean anonymous messaging like never before. To test the moderation you can send messages to me at https://bit.ly/4m9BZ7G Relevant links: https://bit.ly/45so2dI : Homepage https://bit.ly/45rUa10 https://bit.ly/46O78bZ https://bit.ly/459EMYp : Where you can see the messages you received https://subrosa.vercel.app/[username] : Your personal link that you can post on your socials etc. to attract comments. P.S. Please dont share personal or sensitive information. https://bit.ly/45so2dI August 9, 2025 at 02:20AM

Show HN: Tiered storage and fast SQL for InfluxDB 1.x/2.x https://bit.ly/3Um7mQa

Show HN: Tiered storage and fast SQL for InfluxDB 1.x/2.x If you’ve run InfluxDB at scale, you know the pain: Retention policies mean throwing away history, keeping everything means huge hardware & license costs. We built ExyData Historian to fix that. What it does? - Automatically exports old InfluxDB 1.x/2.x data to compressed Parquet in S3 or MinIO - Keep recent data hot in InfluxDB, move the rest to cheap storage - Run fast SQL on archived data via Apache Arrow + DuckDB - Query it all through one interface and / API. No hot/cold boundary for the user Why it matters - 70–80% lower storage costs - Historical queries that are as fast (or faster) than InfluxDB itself - No manual exports, no query rewrites, no downtime Who’s using it right now? InfluxDB Enterprise Customers and Huge instances of OSS, telcos and logistics companies are trying this right now. We help you to reduce your Enterprise licensing cost, cause you are going to shrink your InfluxDB cluster. You keep your existing InfluxDB running, Historian works alongside it, moving history to cheap storage while giving you more analytics power. We’d love feedback from anyone managing large InfluxDB deployments. https://bit.ly/4mtrH1O August 8, 2025 at 11:18PM

Show HN: Trayce – "Burp Suite for developers" https://bit.ly/47kdorW

Show HN: Trayce – "Burp Suite for developers" About a year ago I introduced Trayce to HN as the "network tab for docker containers". Now I have released a new version which adds an HTTP client. The idea is to combine network monitoring with an HTTP client to help developers interact with and debug web application servers. Think "Burp Suite for developers". Trayce stores requests as local files using the .bru file format. The UI is based on Flutter which means it offers a super-fast and modern desktop GUI with a total download size of 13MB (on Linux). I am still adding features to it so would love feedback. Currently the new features in the pipeline are: OAuth2, GRPC, and scripting. It is open source and free to use but a perpetual license must be purchased for continued use. The license model is similar to that of Sublime Text. Thank you! https://bit.ly/3J5FixY August 7, 2025 at 03:49PM

Show HN: Fiig – Reimagining Google scholar for AI research and PDF annotation https://bit.ly/4osUo0F

Show HN: Fiig – Reimagining Google scholar for AI research and PDF annotation With all the new study modes and learning-targeted AI models, we have been building fiig specifically to reduce chatting and encourage actual source exploration and thinking. We love feedback. Fiig has been built alongside higher-education students, professional researchers, and teachers. With fiig, you can find scholarly sources, cite the work, and our AI agent can highlight and annotate any found or uploaded PDF. Other cool features: Tool Tabs: Each agent has a set of tools that can be used in chat while you work. Drag & Drop: Organize and contextualize your workflow by dropping elements straight into chat. @reference Anything: Use @ to reference notes and files directly in your prompts. Studio Interface: Open multiple PDFs, search for sources, and generate text in one unified platform. LMK what you think <3 https://app.ubik.studio/chat August 8, 2025 at 10:22AM

Show HN: I built a simple tool to automate data into Google Sheets and BigQury https://bit.ly/47jzwmf

Show HN: I built a simple tool to automate data into Google Sheets and BigQury I’ve been a freelance data analyst/developer for a while and I’d regularly get hired to build custom data pipelines and dashboards in Google Sheets/Looker Studio. Custom data integrations came with a large upfront cost, and possible maintenance but clients told me they were reluctant to use the major data connector platforms as they were complicated and expensive over time, so I decide to fix this. I recently built SyncRange to be dead simple data connector to Google Sheets with a generous free plan and simple pricing. So far I’ve built out the following connectors based on the needs of my clients and early users: - Shopify - Facebook/Instagram ads - LinkedIn Ads - Google Ads - Google Analytics - Google Search Console I plan on adding more connectors as needed by my clients/users, most of which are in the ecommerce/marketing space so I will focus my time there. After years of building projects that I thought we interesting, but were not validated, I have really noticed the difference building something customers actually want. Please let me know if you have any feedback. https://bit.ly/4m0K0vq August 8, 2025 at 05:02AM

Show HN: From Hacking a T480 to the Fastest Open-Hardware 75 Hz E-Ink Display https://bit.ly/4fotyCI

Show HN: From Hacking a T480 to the Fastest Open-Hardware 75 Hz E-Ink Display Three years ago, I posted here about hacking together a fast e-ink laptop from a T480 because I was tired of spending all day on LCDs. I liked e-ink’s comfort, but it was too slow for day-to-day use. https://bit.ly/4mrPsr2 That post drew in people, which grew into a community experimenting with ways to make e-ink usable for everyday computing. That project later turned into a company and a multi-year project to make e-ink fast and open. We built our own FPGA-based controller, Caster, and went through multiple iterations to push past e-ink’s usual limits, slow refresh, ghosting, and proprietary controllers. Now, after three years, we’ve launched the Modos Paper Developer Kit and Monitor: the fastest open-hardware e-ink display, with 75 Hz refresh and sub-100 ms latency. It works with 6" to 13.3" mono or color panels over HDMI or USB-C, supports multiple grayscale modes, and has a C API for low-level control. The hardware, firmware, and schematics are on our GitHub. https://bit.ly/4munzP1 Our goal is to make e-ink fast and open enough that anyone can build on it, for hacking, research, or daily use. Thanks, HN, for being part of the journey. https://bit.ly/4frsqyh August 8, 2025 at 01:54AM

Show HN: I Built Economic Safety Mechanisms for AI https://bit.ly/459UQJO

Show HN: I Built Economic Safety Mechanisms for AI Title: I Built Economic Safety Mechanisms for AI - Seeking Feedback I have implemented the Reputation Circulation Standard (RCS), which uses exponential decay (like radioactive decay) to make harmful AI behavior economically irrational. The key insight: instead of trying to control AI, create environments where beneficial behavior is the only stable strategy. Power accumulation becomes mathematically impossible. Technical details: - Smart contracts for reputation circulation - Consensus algorithms for detecting divergence - <5% performance overhead - Scales with intelligence level Nassim Taleb endorsed the approach. Already implemented a simpler version for onchain recording of reputation for Animoca Brands - Moca chain. Now raising funds to deploy at AI labs before GPT-5: https://manifund.org/projects/preventing-ai-catastrophe-thro... Paper: [SSRN coming] https://deepthinker.xyz has paper. Demo available under NDA. Would love technical feedback from this community. https://manifund.org/projects/preventing-ai-catastrophe-through-economic-mechanisms---rcs- August 7, 2025 at 01:56AM

Show HN: 3D Chess https://bit.ly/4m5FxYB

Show HN: 3D Chess https://bit.ly/4ftShpi August 7, 2025 at 12:41AM

Show HN: CSV Mail Sender – Send personalized email campaigns from a CSV https://bit.ly/3J2G2DV

Show HN: CSV Mail Sender – Send personalized email campaigns from a CSV https://bit.ly/3UjoYvV August 6, 2025 at 11:28PM