From a paper to an AI agent

A short doodle story of the MRSimulator MCP project. Press play, or tap through.

Can an AI run real physics,
or does it just guess?

I built one to find out. About a minute.

the paperthe agent
Paper2Agent (Nature, 2026) a static PDF, coming alivecallable tools
B₀ 54.7° to B₀ spinning MRSimulator: the physics
Top: a broad static powder pattern. Bottom: the same site under magic-angle spinning, one sharp line
MCP any tool, built onceany AI that speaks MCP
11 simulation tools 1D · 2D · glasses
Spectrum spinning at 2 kHz: many closely spaced sidebands Spectrum spinning at 4 kHz Spectrum spinning at 8 kHz Spectrum spinning at 16 kHz: sidebands far out, one main line
Top: one sharp lineshape for a crystal. Bottom: a broad asymmetric lineshape for a glass
Top: three overlapping sites as one tangled 1D shape. Bottom: the 2D spectrum separating them into three rows
Published thorium fluoride spectrum in navy above the computed one in coral; the peaks line up
tool result ▸ (collapsed) ?the image, hidden a client bug, not a server bug
Hugging Face live, free, and connectablefrom Claude

Real physics, not a guess.

huggingface.co/spaces/Paonai/mrsimulator

Free to try. Tell me what I got wrong.

Record mode: starts in 2 s and loops. Tap anywhere or press Esc to exit.