The best Hacker News stories from Show from the past week
Latest posts:
Show HN: I made a little puzzle game about a rogue chess knight
Show HN: WhatsApp MCP Server
Hi HN – I built an open-source, self-hosted Model Context Protocol (MCP) server for WhatsApp: <a href="https://github.com/lharries/whatsapp-mcp" rel="nofollow">https://github.com/lharries/whatsapp-mcp</a><p>It connects to your personal WhatsApp account via the WhatsApp Web multi-device API (using whatsmeow from the Beeper team), and doesn't rely on third-party APIs. All messages are stored locally in SQLite. Nothing is sent to the cloud unless you explicitly allow your LLM to access the data via tools – so you maintain full control and privacy.<p>The MCP server can:<p>- Search your messages, contacts, and groups<p>- Send WhatsApp messages to individuals or groups<p>Why build this?<p>99% of your life is stored in WhatsApp, by connecting an LLM to WhatsApp you get all this context. And your AI agent can execute tasks on your behalf by sending messages.
Show HN: WhatsApp MCP Server
Hi HN – I built an open-source, self-hosted Model Context Protocol (MCP) server for WhatsApp: <a href="https://github.com/lharries/whatsapp-mcp" rel="nofollow">https://github.com/lharries/whatsapp-mcp</a><p>It connects to your personal WhatsApp account via the WhatsApp Web multi-device API (using whatsmeow from the Beeper team), and doesn't rely on third-party APIs. All messages are stored locally in SQLite. Nothing is sent to the cloud unless you explicitly allow your LLM to access the data via tools – so you maintain full control and privacy.<p>The MCP server can:<p>- Search your messages, contacts, and groups<p>- Send WhatsApp messages to individuals or groups<p>Why build this?<p>99% of your life is stored in WhatsApp, by connecting an LLM to WhatsApp you get all this context. And your AI agent can execute tasks on your behalf by sending messages.
Show HN: WhatsApp MCP Server
Hi HN – I built an open-source, self-hosted Model Context Protocol (MCP) server for WhatsApp: <a href="https://github.com/lharries/whatsapp-mcp" rel="nofollow">https://github.com/lharries/whatsapp-mcp</a><p>It connects to your personal WhatsApp account via the WhatsApp Web multi-device API (using whatsmeow from the Beeper team), and doesn't rely on third-party APIs. All messages are stored locally in SQLite. Nothing is sent to the cloud unless you explicitly allow your LLM to access the data via tools – so you maintain full control and privacy.<p>The MCP server can:<p>- Search your messages, contacts, and groups<p>- Send WhatsApp messages to individuals or groups<p>Why build this?<p>99% of your life is stored in WhatsApp, by connecting an LLM to WhatsApp you get all this context. And your AI agent can execute tasks on your behalf by sending messages.
Show HN: Cloud-Ready Postgres MCP Server
Hey HN,<p>I built pg-mcp, a Model Context Protocol (MCP) server for PostgreSQL that provides structured schema inspection and query execution for LLMs and agents. It's multi-tenant and runs over HTTP/SSE (not stdio)<p>Features
- Supports multiple database connections from multiple agents<p>- Schema Introspection: Returns table structures, types, indexes and constraints; enriched with descriptions from pg_catalog. (for well documented databases)<p>- Read-Only Queries: Controlled execution of queries via MCP.<p>- EXPLAIN Tool: Helps smart agents optimize queries before execution.<p>- Extension Plugins: YAML-based plugin system for Postgres extensions (supports pgvector and postgis out of the box).<p>- Server Mode: Spin up the container and it's ready to accept connections at <a href="http://localhost:8000/sse" rel="nofollow">http://localhost:8000/sse</a>
Show HN: Cloud-Ready Postgres MCP Server
Hey HN,<p>I built pg-mcp, a Model Context Protocol (MCP) server for PostgreSQL that provides structured schema inspection and query execution for LLMs and agents. It's multi-tenant and runs over HTTP/SSE (not stdio)<p>Features
- Supports multiple database connections from multiple agents<p>- Schema Introspection: Returns table structures, types, indexes and constraints; enriched with descriptions from pg_catalog. (for well documented databases)<p>- Read-Only Queries: Controlled execution of queries via MCP.<p>- EXPLAIN Tool: Helps smart agents optimize queries before execution.<p>- Extension Plugins: YAML-based plugin system for Postgres extensions (supports pgvector and postgis out of the box).<p>- Server Mode: Spin up the container and it's ready to accept connections at <a href="http://localhost:8000/sse" rel="nofollow">http://localhost:8000/sse</a>
Show HN: Physical Pomodoro Timer with ESP32 and e-paper screen
Show HN: Physical Pomodoro Timer with ESP32 and e-paper screen
Show HN: Physical Pomodoro Timer with ESP32 and e-paper screen
Show HN: I'm a teacher and built an AI presentation tool
Hi,
I'm a high school teacher from Australia and I've built what I'd like to think is a pretty nifty ChatGPT powered presentation tool for teachers.<p>I'd love it if you could have a look at it and give me some of your feedback.<p>I don't think there's much overlap with the HN crowd and school teachers, but I've been coming here for many years and thought I'd post here and see what you all think.<p>Check it out if you have a minute and I'd be super happy to hear your feedback too.<p><a href="https://www.slidehero.ai/" rel="nofollow">https://www.slidehero.ai/</a><p>You can jump in and have a play with the tool all you like ;)<p>Cheers, Eli
Show HN: I'm a teacher and built an AI presentation tool
Hi,
I'm a high school teacher from Australia and I've built what I'd like to think is a pretty nifty ChatGPT powered presentation tool for teachers.<p>I'd love it if you could have a look at it and give me some of your feedback.<p>I don't think there's much overlap with the HN crowd and school teachers, but I've been coming here for many years and thought I'd post here and see what you all think.<p>Check it out if you have a minute and I'd be super happy to hear your feedback too.<p><a href="https://www.slidehero.ai/" rel="nofollow">https://www.slidehero.ai/</a><p>You can jump in and have a play with the tool all you like ;)<p>Cheers, Eli
Show HN: My iOS app to practice sight reading (10 years in the App Store)
Hello HN, this has been my personal project for quite some time now. It has been a slowly evolving project over the years and its core function is for users to expose themselves to progressively more difficult lessons of music notes.<p>NOTE: It is free and there are no ads. There is an in app purchase but most of the app doesn't require it.
Show HN: My iOS app to practice sight reading (10 years in the App Store)
Hello HN, this has been my personal project for quite some time now. It has been a slowly evolving project over the years and its core function is for users to expose themselves to progressively more difficult lessons of music notes.<p>NOTE: It is free and there are no ads. There is an in app purchase but most of the app doesn't require it.
Show HN: My iOS app to practice sight reading (10 years in the App Store)
Hello HN, this has been my personal project for quite some time now. It has been a slowly evolving project over the years and its core function is for users to expose themselves to progressively more difficult lessons of music notes.<p>NOTE: It is free and there are no ads. There is an in app purchase but most of the app doesn't require it.
Show HN: LinkedIn sucks, so I built a better one
LinkedIn feels more like Facebook every day — noisy feeds, fake engagement, and everyone shouting into the void.<p>Thats why I used to built a personal microsite on Squarespace and uploaded a video resume to YouTube to stand out - it helped me land interviews and get into Big Tech.<p>But I always wondered: why isn’t there a platform designed to help you stand out like that?<p>So I built OpenSpot: a public, curated platform where you can showcase who you are — with video, audio, and proof of your work. No endless feeds. No humblebrags. Just real people open to new opportunities.<p>We’ve already onboarded a few companies, so recruiters can reach out to you directly. But you can also connect with other standout folks and supercharge your network.<p>Just upload your resume and we´ll automatically generate your profile in under 1 minute.<p>It’s early, but feels like something people actually need.
Would love your thoughts.
Show HN: LinkedIn sucks, so I built a better one
LinkedIn feels more like Facebook every day — noisy feeds, fake engagement, and everyone shouting into the void.<p>Thats why I used to built a personal microsite on Squarespace and uploaded a video resume to YouTube to stand out - it helped me land interviews and get into Big Tech.<p>But I always wondered: why isn’t there a platform designed to help you stand out like that?<p>So I built OpenSpot: a public, curated platform where you can showcase who you are — with video, audio, and proof of your work. No endless feeds. No humblebrags. Just real people open to new opportunities.<p>We’ve already onboarded a few companies, so recruiters can reach out to you directly. But you can also connect with other standout folks and supercharge your network.<p>Just upload your resume and we´ll automatically generate your profile in under 1 minute.<p>It’s early, but feels like something people actually need.
Would love your thoughts.
Show HN: LinkedIn sucks, so I built a better one
LinkedIn feels more like Facebook every day — noisy feeds, fake engagement, and everyone shouting into the void.<p>Thats why I used to built a personal microsite on Squarespace and uploaded a video resume to YouTube to stand out - it helped me land interviews and get into Big Tech.<p>But I always wondered: why isn’t there a platform designed to help you stand out like that?<p>So I built OpenSpot: a public, curated platform where you can showcase who you are — with video, audio, and proof of your work. No endless feeds. No humblebrags. Just real people open to new opportunities.<p>We’ve already onboarded a few companies, so recruiters can reach out to you directly. But you can also connect with other standout folks and supercharge your network.<p>Just upload your resume and we´ll automatically generate your profile in under 1 minute.<p>It’s early, but feels like something people actually need.
Would love your thoughts.
Show HN: I built a website for sharing drum patterns
Originally started as a project to restore patterns from now defunct website 808.pixll.de just for myself, but eventually i decided to share it with others. I've seen this website mentioned a couple of times on HN:)<p>Currently it only supports Roland TR-808, but there will be more.
Show HN: I built a website for sharing drum patterns
Originally started as a project to restore patterns from now defunct website 808.pixll.de just for myself, but eventually i decided to share it with others. I've seen this website mentioned a couple of times on HN:)<p>Currently it only supports Roland TR-808, but there will be more.
Show HN: I built a website for sharing drum patterns
Originally started as a project to restore patterns from now defunct website 808.pixll.de just for myself, but eventually i decided to share it with others. I've seen this website mentioned a couple of times on HN:)<p>Currently it only supports Roland TR-808, but there will be more.