Let agents find US doctors with checkable evidence over MCP
A developer built a remote MCP server with 1.2M US physicians, Medicare procedure volumes and facts from hospital sites.
Build an interactive physics explorer with your agent
A builder made a free, open-source gravity, orbits and time-dilation explorer with his OpenClaw agent and GPT-6 Astra.
- Difficulty
- IntermediateOur rating
- Time to build
- Not reportedOur estimate
- Monthly cost
- Not reported
- Revenue
- Not reportedWe only show revenue the source states
- Engagement
- 1 X like1 reply · 0 reposts · fetched Oct 15, 2026
What they did
@jason_armstrong built it with his OpenClaw agent, Eve.
How it went
Free, open source and works on phones.
Worth knowing
Check the physics against known results.
Builder recipe
Our own starting point, written from the source. Adapt it to your setup.
Stack
- OpenClaw
- GPT-class model
- A web canvas library
Steps
- Pick one concept to learn or teach.
- Have the agent build or explain it step by step.
- Test your understanding by changing parameters or asking why.
- Iterate.
Starter prompt
Build a mobile-friendly page simulating two orbiting bodies, with sliders for mass and distance and a clock showing gravitational time dilation.Tags
Read the original
- X: x.com/jason_armstrong/status/2098540204499906988 ↗ (opens in new tab) Sep 11, 2026 · 1 likes, 1 replies, 0 reposts (fetched 2026-10-15)
Related use cases
Host personal agents in sandboxes for cents a month
A bootstrapped YC founder explains how his sandbox service runs personal Claude Code and OpenClaw agents for about $0.05-$0.10 per free user a month.
Have your agent phone a restaurant and book only if your must-haves are met
A user’s OpenClaw agent called restaurants in Dubai with a strict brief and declined to book when a must-have was missing.
Generate LEGO models from a prompt
A hobbyist spent months getting ChatGPT and Claude to write LDraw, the instruction language for LEGO CAD models, and open-sourced the tooling.
The Daily 5.
Five real AI agent use cases each morning, each with a recipe and a source. Plus a Sunday roundup. Free.