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EchoJEPA: Latent Predictive Foundation Model for Echocardiography

https://github.com/bowang-lab/EchoJEPA
1•euvin•3m ago•0 comments

Disablling Go Telemetry

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Effective Nihilism

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No 10 blocks report on impact of rainforest collapse on food prices

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Seedance 2.0 Is Coming

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Dexterous robotic hands: 2009 – 2014 – 2025

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Interop 2025: A Year of Convergence

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JobArena – Human Intuition vs. Artificial Intelligence

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Concept Artists Say Generative AI References Only Make Their Jobs Harder

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https://github.com/mkmkkkkk/paysentry
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https://moli-green.is/
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The Crumbling Workflow Moat: Aggregation Theory's Final Chapter

https://twitter.com/nicbstme/status/2019149771706102022
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Pax Historia – User and AI powered gaming platform

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Show HN: I built a RAG engine to search Singaporean laws

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Scams, Fraud, and Fake Apps: How to Protect Your Money in a Mobile-First Economy

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Porting Doom to My WebAssembly VM

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Cognitive Style and Visual Attention in Multimodal Museum Exhibitions

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Full-Blown Cross-Assembler in a Bash Script

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Logic Puzzles: Why the Liar Is the Helpful One

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The Tao of Programming

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Forcing Rust: How Big Tech Lobbied the Government into a Language Mandate

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PanelBench: We evaluated Cursor's Visual Editor on 89 test cases. 43 fail

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Show HN: Sem – Semantic diffs and patches for Git

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1•rs545837•1h ago•1 comments
Open in hackernews

Show HN: Mock PSP API – simulate payments and webhooks

3•d_sai•5mo ago
I’ve been tinkering on a side project: a mock PSP (Payment Service Provider) API.

It’s meant for developers who want to:

- test payment workflows without touching Stripe/Adyen/etc. - quickly simulate authorise / decline / capture states - practice handling webhook events in their apps

No signup needed — you can grab an API key in the console and start calling endpoints. Free tier: 100 requests/day.

Live console: https://paylab-ui.vercel.app/ Docs: https://paylab-ui.vercel.app/dashboard/docs

Right now MVP supports:

- POST /payment-intents - POST /payment-intents/:id/payments (supported payment statuses: initiated, authorising, authorised, declined, capturing, expired, captured, capture_failed) - GET /payment-intents/:id - Webhook subscription + delivery history

Would love your feedback!

What’s missing for it to be useful in your dev/test workflow? Should I add another API that you find more useful, or continue developing mock PSP API first?

Thanks!

Comments

Dell3420•5mo ago
Probably something minor, usually people also need to get fraud rate? probably something like that, before transacting (usually score based).

Also probably something else like personal data, will be able to set rule to reject based on country and residence when transacting.

d_sai•5mo ago
Great point! That’s definitely something worth adding to make the API feel more realistic. I’ll look into incorporating a fraud rate simulation along with a simple rule engine in the next version.

Really appreciate the feedback!