Two products · one engine
The API is free. Copilot is the product.
The physicsbase API and solver are free during the research preview — all elements, all analyses, no quota, no card. physicsbase Copilot, the expert agent that plans the analysis, drives the verified solver, and reads the evidence for you, is our first subscription.
physicsbase API · research preview
$0 / no limits
- All 25 element types and all 40 analyses: static, modal, buckling, transient, contact, nonlinear, composites, CFD, acoustics, multiphysics, adaptive, topology, and fracture
- Unlimited solves. There is no monthly quota in the preview
- REST, MCP, and the Python SDK. The same key works in all of them
- Each solve does a self-check. It gives the equilibrium residual, the discretization-error estimate, and a PASS or FAIL assessment
- An API key shows your use. This helps us to know what to build next. No payment method is necessary
physicsbase Copilot NEW
$29 / seat · month
- An expert finite-element agent that knows every analysis, element, and material in the engine — describe a structure and a question in plain language, it does the rest
- It runs the real verified solver, not a guess: every answer carries the numerical-verification verdict (PASS / REVIEW) and the reference it was checked against
- It returns the solved model as a colored contour plot with a legend — stress, displacement or field — right in the chat, alongside the numbers
- It writes the exact Problem JSON it ran, so it teaches you the API as you go
- Powered by frontier models (Claude or GPT), configurable per deployment
- Unlimited chat, full-size problems, and priority access to new capabilities
- Free to try on the Copilot page — subscribe for unlimited use and API access
Questions
Is it really free?
Yes. This is a research preview. We want to see how agents use the solver before we set a price. There is no card, no quota, and no paid plan now.
Why do I need an API key if it is free?
The key connects requests to an account. This lets us measure use and send you changes. That is the data we collect. The key has no payment method. We do not bill you.
Will it always be free?
The preview is free now. If we add paid plans later, we give you clear notice first. We keep a free plan for small use and for academic use. We do not make changes without notice.
Is there a use limit?
There is no monthly quota in the preview. There is a fair-use rate limit so one user cannot slow the service for everyone: 60 solves per minute and 1,000 per hour per key, and up to 20,000 nodes per solve on the free plan. Past the limit the API returns 429 with a Retry-After header — wait and continue. Your exact limits: GET /auth/usage. Need more? Contact us.