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Show HN: Audio Toolkit for Agents

https://github.com/shiehn/sas-audio-processor
22•stevehiehn•4h ago•2 comments

Show HN: PraxisJS – signal-driven front end framework and AI experiment

https://praxisjs.org/
2•mateusgx•1h ago•0 comments

Show HN: Vertex.js – A 1kloc SPA Framework

https://lukeb42.github.io/vertex-manual.html
24•LukeB42•9h ago•17 comments

Show HN: Now I Get It – Translate scientific papers into interactive webpages

https://nowigetit.us
275•jbdamask•1d ago•124 comments

Show HN: Boucle – A self-dogfooding autonomous AI agent framework in Rus

https://github.com/Bande-a-Bonnot/Boucle-framework
2•ElFitz•2h ago•0 comments

Show HN: I built a tool that turns any API into a CLI for agents

https://instantcli.com
4•stugreen13•3h ago•8 comments

Show HN: Panel Panic a Rust/Macroquad/WASM Panel de Pon/Tetris Attack Clone

https://panel-panic.com
2•LarsDu88•3h ago•0 comments

Show HN: SkillMesh (role-based tool routing for Claude/Codex)

https://github.com/varunreddy/SkillMesh
3•VarunReddy023•4h ago•0 comments

Show HN: MCP Playground – free MCP test servers, inspector, and 10K+ server list

https://mcpplaygroundonline.com
7•rupatiwari25•6h ago•10 comments

Show HN: Tree, but for Token Usage

https://github.com/li-kai/treetok
3•likium•6h ago•0 comments

Show HN: HN Skins – Style HN with 5 Skins: Cafe, London, Teletype, Terminal, Nox

https://github.com/susam/hnskins
2•susam•6h ago•0 comments

Show HN: I'm a teen from Kenya and I built a package manager in Rust for fun

https://github.com/v1peridae/vee
6•v1peridae•6h ago•0 comments

Show HN: Unfucked - version all changes (by any tool) - local-first/source avail

https://www.unfudged.io/
133•cyrusradfar•2d ago•83 comments

Show HN: RetroTick – Run classic Windows EXEs in the browser

https://retrotick.com/
191•lqs_•2d ago•58 comments

Show HN: I built a browser-based 3D editor since I didn't want to learn Blender

https://app.topomaker.com/
7•whothatcodeguy•7h ago•3 comments

Show HN: SplatHash – A lightweight alternative to BlurHash and ThumbHash

https://github.com/junevm/splathash
58•unsorted2270•1d ago•20 comments

Show HN: Auto-cleanup for Claude Code's orphan process memory leak

https://github.com/theQuert/claude-code-cleanup
3•thequert•7h ago•0 comments

Show HN: Claude-File-Recovery, recover files from your ~/.claude sessions

https://github.com/hjtenklooster/claude-file-recovery
95•rikk3rt•2d ago•41 comments

Show HN: Rulegen – Auto-generate Claude.md and .cursorrules from your codebase

https://github.com/vexorkai/rulegen
4•vexorkai•8h ago•1 comments

Show HN: Teletext-Style Portfolio Website

https://pakastin.fi
2•pkstn•8h ago•1 comments

Show HN: "Vote-MCP" -- a bit like Google Forms, but for AIs

https://vote-demo.dapp32.com/about
3•_codah_•8h ago•0 comments

Show HN: SQLite for Rivet Actors – one database per agent, tenant, or document

https://github.com/rivet-dev/rivet
42•NathanFlurry•1d ago•16 comments

Show HN: Xmloxide – an agent-made Rust replacement for libxml2

https://github.com/jonwiggins/xmloxide
61•jawiggins•20h ago•61 comments

Show HN: Gitcredits – movie-style end credits for any Git repo in your terminal

https://github.com/Higangssh/gitcredits
35•swq115•1d ago•5 comments

Show HN: Badge that shows how well your codebase fits in an LLM's context window

https://github.com/qwibitai/nanoclaw/tree/main/repo-tokens
85•jimminyx•2d ago•40 comments

Show HN: I built a self-hosted course platform in Clojure

https://clojure.stream
59•jacekschae•3d ago•13 comments

Show HN: Hacker Smacker – Spot great (and terrible) HN commenters at a glance

https://hackersmacker.org
144•conesus•5d ago•167 comments

Show HN: Userscript to Display Age/Karma of HN Users

https://gist.github.com/m4chinations/f6d58711a94077d96cf4157665b0bab3
5•linksbro•15h ago•1 comments

Show HN: Effective Git

https://github.com/nolasoft/okgit
3•nola-a•11h ago•0 comments

Show HN: Optimal: Cost effective infra with agentic inbox

https://github.com/agg111/optimal
4•aishwaryagune•11h ago•0 comments
Open in hackernews

Show HN: MCP Playground – free MCP test servers, inspector, and 10K+ server list

https://mcpplaygroundonline.com
7•rupatiwari25•6h ago
MCP Playground is a Postman-style tool for MCP — inspect servers, execute tools live, test your client, all from the browser.

Four things in one place:

1. Free hosted MCP servers — four public test servers anyone can point their client at: Echo (connectivity), Auth (Bearer token flow), Error (error handling), Complex (multi-tool schemas).No sign-up, just use the URL.

2. Server inspector — paste any remote MCP server URL, see all its tools/resources/prompts, execute them live, inspect the full JSON-RPC log. HTTP, SSE, and WebSocket all supported.

3. Registry — 10,000+ servers indexed by category. Each links to the repo and can be tested in the inspector directly.

4. Recipes + guides — 45 articles and step-by-step workflows for real use cases: GitHub PR reviewer, standup bot, database query assistant, Meta ads automation, and more.

Everything free, no install, no sign-up.

Happy to answer questions on the implementation.

Comments

mt18•6h ago
Any plan to support ws transport ? A few newer mcp servers are moving away from SSE
rupatiwari25•6h ago
yes, it’s in the pipeline.
mt18•5h ago
I liked the recipe part though especially the Meta Ads one, you can keep it open for others to contribute as well—it could help increase engagement.
rupatiwari25•5h ago
Noted. Thanks
nikhiltiwari25•5h ago
How is this different from MCP Inspector?
rupatiwari25•5h ago
Inspector is the right tool for local STDIO servers — use it. We're complementary, not competing.

MCP Playground fills a different gap: no install (browser tab, nothing to run), built for remote HTTP/SSE endpoints rather than local processes, and includes hosted test servers so you can verify your client implementation without needing a server at all. Plus a registry if you're trying to discover what's out there.

Inspector ideal for: STDIO, local debugging, open source, deeper protocol introspection. MCP Playground for: zero setup, remote servers, client testing, browsing mcp registry/server list.

guerython•5h ago
Love the hosted SSE/HTTP mirrors and registry. We built something similar to catch handshake drift in our remote MCP clients, and being able to replay the JSON-RPC log in-browser saved us from chasing environment-specific timeouts because we could rerun the exact frame sequence from the failure. One idea: add a little health badge per server showing last-seen transport (HTTP/SSE/WS) plus a running error count so integrators know which endpoint matches their stack before they flip the switch.
rupatiwari25•5h ago
Really appreciate this — handshake drift is a real issue in MCP setups. Also love the health badge idea (showing last transport + error count would be super helpful).

Thanks for sharing

jacksm1243•46m ago
Add a dark mode
rupatiwari25•43m ago
Noted. Thanks for the feedback.