Show HN: X402 – an open standard for internet native payments https://ift.tt/mfjK3Nu

Show HN: X402 – an open standard for internet native payments Hi HN – excited to announce x402, initially developed by Coinbase (YC 12) x402 lets any HTTP API charge per request without issuing API keys or storing credit cards. Buyers (humans or AI agents) keep funds in their own wallet and dynamically discover compatible endpoints, call them as usual, and automatically pay a microtransaction in USDC or other tokens to settle. 90 second demo: https://www.youtube.com/watch?v=PV-L2AfLhJg Problem: Every time we want to use a new API we have to: find the service online create a developer account, copy a secret key into env vars, pre-fund or hand over a credit card This flow blocks agents even more. They can’t solve CAPTCHAs or enter credit cards. It also hurts sellers: fraud, chargebacks, onboarding friction, and marketing to humans are huge pain points. Why buyers care Zero setup – Hit a new endpoint immediately. Runtime discovery – Because every x402 service exists in a common registry, an agent can search, compare, and invoke in one loop. Self-assembling agents become practical. Easily create proxy servers – Want an endpoint that isn’t supported? You can use our proxy server template to spin up an x402-compatible instance yourself using traditional API keys, and monetize it for others wanting access. Why sellers care Reach incremental demand – Long-tail bots, side projects, one-off scripts, all of which too small for an account/signup flow, can now pay you. Micropayments without fraud – All payments settle onchain, nothing for stolen credit cards or chargebacks to reverse. Embedded distribution – instead of marketing to humans, create a compelling service meeting demand for agents and watch the requests roll in. How we got here Last year we launched AgentKit (wallets for AI agents). Tens of thousands of agents now hold onchain balances, but they can’t pay for most web services. We revived the long-unused HTTP 402 (“Payment Required”) status code and wrote a spec to make it real. Marc Andresseen calls the lack of native value transfer “the original sin of the internet,” and we see x402 as the absolution of this sin. How it works: x402 specifies a standard response body to accompany a 402 status code. This response body contains machine understandable instructions for how to pay. Payments are signature based an included as an `X-PAYMENT` header in a subsequent request to the same API endpoint. The accepting server can verify and settle payment themselves, or delegate the onchain settlement to what we call a facilitator. This means you don't have to touch crypto as a developer, you can just integrate a middleware and start receiving stablecoin payments in as little as 1 line of code. Because x402 natively traverses your existing client / server requests, it can be implemented in any language, and doesn't require webhooks, or any other complex integration. Its literally this simple: `paymentMiddleware("0xYourAddress", {"/your-endpoint": "$0.01"})` Ask HN API providers – does the one-line integration fit your stack? What’s missing? Agent / infra builders – if a service isn’t available is the proxy server template sufficient? File issues, PRs welcome Everyone – poke holes in the trust and fee model; we’d love to iterate with your feedback Curious to learn more? Check out our documentation and repo for more information, and please don’t hesitate to reach out to get onboard. https://ift.tt/MVeSvHZ https://x402.org https://ift.tt/6iERQ20... https://www.x402.org/ May 6, 2025 at 11:54PM

Show HN: Korey – a product management agent for software teams https://ift.tt/LUsKuvW

Show HN: Korey – a product management agent for software teams https://korey.ai/ May 7, 2025 at 12:23AM

Show HN: Automate your workflows with screen recordings and AI agents https://ift.tt/Mx6QudR

Show HN: Automate your workflows with screen recordings and AI agents Hi all, There are tons of AI agent builders out there. But let’s be honest, for most people, they’re still hard to use. Every single day, I see people struggling to create workflows with these agents and posting their requirements on Upwork. So we built Nutix. Just upload your screen recording and that’s it. Nutix watches what you do, understands your workflow, and builds it with AI agents instantly. You'll have to authorize access to underlying application for agents runs. Access over 2500+ applications and build your automations on top of it. No prompts. No coding. Just show it once , and you're done. https://nutix.ai May 6, 2025 at 03:32AM

Show HN: Tired of bloated time trackers? Here's a dead-simple, free one I built https://ift.tt/lW3wPRh

Show HN: Tired of bloated time trackers? Here's a dead-simple, free one I built Hey HN! I made TimeAnt because my dad needed a simple way to track his time at work and he didn’t like the other apps out there because they were too complicated or had way too many features. So, I built an app that just does the basics: track work hours, meetings, breaks, lunch and optionally lets you add notes - and that's it. It’s totally free, works both online and offline, and doesn’t require an account (but you can create one if you want). The goal was to keep it super simple and let you focus on tracking time without all the fluff. It also gave me a chance to learn Swift and build my first native iOS app! I’d love to hear what you think! Best, Viktor https://ift.tt/PYHIX9n May 6, 2025 at 01:21AM

Declarative Tcl/Tk UI Library for Python https://ift.tt/pBFXMNI

Declarative Tcl/Tk UI Library for Python https://ift.tt/Ij2TCdR May 5, 2025 at 11:32PM

Show HN: ImagePuzzle – multiplayer picture puzzle game https://ift.tt/RAFI6ia

Show HN: ImagePuzzle – multiplayer picture puzzle game I made ImagePuzzle, a simple and fun browser game. Would love your thoughts! https://ift.tt/ziaRkF7 May 4, 2025 at 10:29PM

Show HN: Search Engine Selector – This is my default search engine now https://ift.tt/aq6gKEV

Show HN: Search Engine Selector – This is my default search engine now I built this to escape from the Google bubble. Instead of sticking with just one search engine, it nudges you to choose the most appropriate one for each query. https://ift.tt/BrLtRXG May 4, 2025 at 10:07PM

Show HN: Live Air Quality Monitor https://ift.tt/fazAZbU

Show HN: Live Air Quality Monitor A comprehensive indoor air quality monitoring system built with ESP32-C3 Super Mini and multiple environmental sensors. This project helps you monitor CO2, temperature, humidity, volatile organic compounds (VOCs), nitrogen oxides (NOx), and particulate matter (PM1.0, PM2.5, PM10) to maintain healthy air quality in your home or office. https://ift.tt/YohTp3H May 4, 2025 at 12:21AM

Show HN: Poopoo peepee Language – A vowel-based, programming language https://ift.tt/phI6Yrn

Show HN: Poopoo peepee Language – A vowel-based, programming language A language consisting strictly of the letter p separated by vowels. Originally dreamed up for April Fools’, I’m now planning to put it through its paces in this year’s Advent of Code. https://ift.tt/KFmTLRJ May 3, 2025 at 08:08PM

Show HN: Kinematic Hand Skeleton Optimization in Jax https://ift.tt/lu1IwGU

Show HN: Kinematic Hand Skeleton Optimization in Jax I've been trying to wrap my head around fwd/bwd kinematics for imitation learning, so I built a fully‑differentiable kinematic hand skeleton in JAX and visualized it with reruns new callback system in a Jupyter Notebook. This shows each joint angle and how it impacts the kinematic skeleton. https://ift.tt/hfOoCZM May 3, 2025 at 02:33AM

Show HN: Traycer.ai – Turn GitHub Issues into a Step-by-Step Plan https://ift.tt/tQRxfrL

Show HN: Traycer.ai – Turn GitHub Issues into a Step-by-Step Plan Hey everyone! We've built Traycer, a tool that transforms your GitHub issues—everything from descriptions and attached images to ongoing conversations—into clear, actionable implementation plans. You can easily import these plans into your IDE with our extension or use them with any other coding assistant you prefer. We'd love to hear your thoughts and feedback. Traycer is totally free for open-source projects, and we've got a 2-week free trial if you're working with private repos. Give it a try and let us know what you think! https://ift.tt/2qVE9el May 3, 2025 at 01:56AM

Show HN: Polyseed – first(?) pq PAKE implementation https://ift.tt/YKqV3Uo

Show HN: Polyseed – first(?) pq PAKE implementation https://ift.tt/5DF4IOc May 2, 2025 at 09:10PM

Show HN: I built a synthesizer based on 3D physics and launched the product https://ift.tt/ALgGhtT

Show HN: I built a synthesizer based on 3D physics and launched the product I've been working on the Anukari 3D Physics Synthesizer for a little over two years now. It's one of the earliest virtual instruments to rely on the GPU for audio processing, which has been incredibly challenging and fun. In the end, predictably, the GUI for manipulating the 3D system actually ended up being a lot more work than the physics simulation. So far I am only selling it direct on my website, which seems to be working well. I hope to turn it into a sustainable business, and ideally I'd have enough revenue to hire folks to help with it. So far it's been 99% a solo project, with (awesome) contractors brought in for some of the stuff that I'm bad at, like the 3D models and making instrument presets/videos. The official launch announcement video is here: https://www.youtube.com/watch?v=NYX_eeNVIEU But if you REALLY want to see what it can do, check out what Mick Cormick did with in on the first day: https://ift.tt/vM3POlU I've kept a fairly detailed developer log about my progress on the project since October 2023, which might be of interest to the hardcore technical folks here: https://ift.tt/Ufe1bxu I also gave a talk at Audio Developer Conference 2023 (ADC23) that goes deep into a couple of the problems I solved for Anukari: https://www.youtube.com/watch?v=lb8b1SYy73Q https://anukari.com May 2, 2025 at 11:42PM

Show HN: HN top 30 summarized by Gemini 2.5 Pro https://ift.tt/YZ1WBuq

Show HN: HN top 30 summarized by Gemini 2.5 Pro Fun little project, had Gemini 2.5 Pro summarize HN's top 30 each hour, both the stories and comment sections. Pretty impressed with Gemini 2.5. It's probably the first model other than Claude 3.7 Sonnet where I actually find the output readable. I normally use 3.7 Sonnet for coding, but used Gemini for the codegen on this one as well. Was pretty impressed! Using Cursor, it seemed to instruction-follow better than Claude generally does, and remain lucid during very long agent sessions. Thanks for your feedback! https://ift.tt/16IGog4 May 2, 2025 at 01:42AM

Show HN: Lichen – Manage and create code licenses on the CLI and with TOML https://ift.tt/bq9alxQ

Show HN: Lichen – Manage and create code licenses on the CLI and with TOML Hey! I'm Miles, I built this tool to be a fast and reliable solution for generating licenses on the CLI. Licensing has always been a point of stress for me, with how much is at stake. If I copy one from the wrong website, the version I download is the wrong one, or any number of mishaps, my whole code is at risk. We see this fiasco play out all the time. We shake our saddened heads and go on. No longer! Lichen is designed to generate licenses sensibly with three words on the CLI. `lic gen MIT`. Or in a `.lichen.toml` in your project root. Add authors/maintainers with --authors, date it with --date, license specific parts with exclude patterns and double licenses. Project big or small, it's got everything (I think). (Tell me what it's missing please). It uses SPDX licenses for correctness. Written in Rust, you'll know you're safe, and if you want to be extra cautious, feel free to create license headers on all your files (Fast too! Can do this for the entire cargo project in 22s uncached). I'm happy to answer any questions/concerns/whatever about my tool, it's my biggest project to date (And therefore my most bug-ridden...) https://ift.tt/MNXkh7r May 1, 2025 at 10:25PM

Show HN: Robot Unlock – an open-ended programming game/zachlike https://ift.tt/XUcFPoM

Show HN: Robot Unlock – an open-ended programming game/zachlike Hello, In 2010 I made an open-ended programming game based on Befunge and Brainf*k. I was young and didn't know what I was doing - coding it in AutoIT of all things and using borderless windows for sprites. Nevertheless, it was a full game and some people actually played it, sharing solutions with each other. I took it as a sign that the game had some potential - I appreciated this very much at the time. It was zachlike at its core, except that it came out earlier than SpaceChem and the term hadn't been coined yet. Years passed, I worked in the game industry, had some fun, learned a few things and eventually burned out. Meanwhile, Zachtronics kept making games and managed to define a genre, proving that there indeed was a market for such games. I'm very happy about that. Now I want to have a shot at going indie and almost 15 years later I'm launching the sequel to my 2010 game. One of my playtesters has been at it for 26 hours so I know it can be a real nerd sniper. It's a game for the type of person who loves quirky languages and optimizing their programs under extreme constraints. I have been hanging out on HN for a long time and thought some in this community might like the game. I want to keep doing this and I will as long as I can afford it. Looking forward to your questions and feedback. https://ift.tt/mq9sHkw https://ift.tt/cElORtB May 1, 2025 at 09:08PM

Show HN: The Azure Key Vault Emulator https://ift.tt/vcQu3jn

Show HN: The Azure Key Vault Emulator Full introduction blog post is here with a setup/usage guide too: https://ift.tt/yOT0LaF https://ift.tt/IBrYoed May 1, 2025 at 02:01AM

Show HN: I built a fun AI tour guide into Google Street View https://ift.tt/wOtvyBi

Show HN: I built a fun AI tour guide into Google Street View I love culture + travel, and one of my favorite pastimes is dropping into random streets on Google Street View. I just LOVE getting a tiny snippet into how people live, the architecture, and discovering hidden corners of places I'll probably never visit. I'm kinda weird like that. When AI came along, I started asking it to explain what I was looking at - and I learned a ton. I couldn't stop using this combo. So I built Streetwhip. It's kinda like reverse Geoguessr - instead of guessing where you are, you get educated about places as if you had a smart local guide with you. What used to be just "some random street in Buenos Aires" becomes a rich learning adventure about Argentine architecture, why things look the way you are, and stuff about the history and way of life. I've been having so much fun with it. I LOVE when I'm on an ordinary looking street and suddenly I find out there's a WILD historic story behind why the architecture is a certain way. A couple of tips: - make sure you log in! If you don't, things aren't really real-time (I had to do this because Street View's API costs can get expensive and this is just a fun hobby project for me). - play around with the categories - they're fun. I'm curating in more places over time. - the search is not perfect - when it works its magical (totally llm-driven). But sometimes it isn't. - don't use this on mobile, it kinda sucks Would love to get your thoughts on the concept and what you could see it turn into! :) P.S. Oh and one of my favorite features: radio! You get a live radio from a stream in the country (please mute it if you get annoyed - but I promise you it makes things a whole lot more immersive) https://streetwhip.com/ May 1, 2025 at 12:21AM

Show HN: Jarvis-AI, an AI Agents network that kills admin work in big corporate https://ift.tt/YtDWcab

Show HN: Jarvis-AI, an AI Agents network that kills admin work in big corporate Cheers HN, We're Oli and Pascal, two friends from ETH Zürich. We built a network of AI Agents for large organisations, that finally gets rid of all admin work for employees. Current features are: - Schedule, move or cancel meetings (via Google Calendar or locally) - Dynamically adapt meetings according to stakeholders’ availabilities (internal communication of the agents) - Summarize incoming mails (via Gmail) - Create a project plan (command: plan XXX = [project description]) including stakeholders, timeline and cost estimate - Plan, assign and view tasks - Do all of the above via audio We believe that the network point is the core of the product. If you're planning a new project, Jarvis should not only give ideas but also propose whom to work with based on the context information of all the other Jarvises in the company. Instead of sending mails, information flow happens between the Agents and the audio feature makes it super natural to speak to your Jarvis. This is very early stage, so any advice/feedback is much appreciated :) https://ift.tt/bYgpJI6 May 1, 2025 at 12:19AM

Show HN: Tariff Calculator for Amazon https://ift.tt/o7PExK0

Show HN: Tariff Calculator for Amazon I made a simple tariff calculator extension for Amazon. It queries gemini flash 2.0 to determine the category, and then matches it with the corresponding tariff category. Fun quick hack – it does brick a little – but the majority of the code was cobbled by a first pass of Claude Code Repo is here: https://ift.tt/uS49esT https://twitter.com/W_Y_X/status/1917385625696887159 April 30, 2025 at 06:43AM