One plan. Full access. $20/month.

Every property value and its source citation, with no account at all.

• Free account: interactive curves, the Material Selector, regulatory screening across 22 regulations, and calibration setup.
• Pro: plain-English search, side-by-side comparison, curve overlays, CAE exports, unlimited calibration fits, and agent access over MCP.

11 formats, each converted to its native unit profile — Abaqus mm-N-s, LS-DYNA g-mm-ms, ANSYS SI and the rest.

• Abaqus (.inp), LS-DYNA (.k), ANSYS APDL (.mac)
• Ansys Workbench Engineering Data (.xml, MatML) — imports across Mechanical, Fluent, CFX and LS-DYNA
• Nastran (.bdf), including the Simcenter Nastran NX and OptiStruct dialects
• Radioss (.rad), SolidWorks (.sldmat), CSV, JSON

Type a sentence — “lightweight alloy for 300 °C”, “titanium with yield above 800 MPa” — and get a ranked shortlist with the numbers that put each material there.

• Each result shows the value that met your bound, where it stands among the candidates, and the hottest temperature its data reaches.
• Every filter is a chip you can remove; when nothing matches, the page names the constraint to drop and how many materials that unlocks.
• Results come from handbook alloys, tempers, polymers and laminates — computed compounds only when you ask for a computed property.
• Pro, 20 searches a day, shared with your agent.

Yes, on Pro: a remote MCP server at api.matworld.ai/mcp with eleven tools.

• Search by designation or keyword, a datasheet summary sized for a context window, the property rows behind any key (paged and filtered, each with its source), a curve index and any single curve.
• Side-by-side comparison, regulatory screening, the property catalogue, and plain-English search on the same 20-a-day allowance as the search box.
• CAE export — any of the 11 formats returned as file text, after the same one-time data-notice acknowledgment the site asks for.
• Connect with a personal key (Settings → Agent access) from Claude Code, Cursor, Gemini CLI or an agent built on the Anthropic, OpenAI or Gemini API — or add the URL as a custom connector in Claude.ai, Claude Desktop or ChatGPT and sign in with your MatWorld account.
• Every answer carries the same source citations and data notice as the site.

Upload your own stress-strain, creep, relaxation or DMA curves and fit a constitutive model — Johnson-Cook, Ogden, Mooney-Rivlin, Chaboche, Prony series or Hill.

• Setup is free with an account; running the fit is Pro and unmetered.
• Every fit returns a PASS / CAUTION / REJECT verdict with named findings: the deformation modes your data never covered, coefficients it does not actually determine, and where the model stops extrapolating.
• Abaqus and ANSYS cards are emitted only for fits that hold up — a rejected fit gets no card, and costs you nothing.

Open sources, and every value carries its citation and a confidence score.

• Peer-reviewed papers with DOI links.
• The public-domain U.S. DoD handbooks MIL-HDBK-5J (metals) and MIL-HDBK-17 (composites) — every curve carries its figure number.
• Openly licensed research databases, measured and computed.
• Computed values are labelled with the DFT method behind them, so a computed band gap never passes for a measured one.

Pass/fail outcomes for all 22 regulations, free with an account.

• RoHS, REACH SVHC, Prop 65, TSCA, Conflict Minerals, ITAR, EAR and more.
• RoHS, REACH SVHC and Prop 65 are validated against the official ECHA and OEHHA substance lists.
• Each result shows the underlying substance list, threshold values, CAS numbers and source citations.

Yes. The free tier has no time limit.

• Every property value with source citations, no account needed.
• Sign in for interactive curves, the Material Selector, regulatory screening and calibration setup.
• Upgrade to Pro any time for plain-English search, comparison, curve overlays, CAE exports, unlimited fits and agent access.

A flat-fee bundle for 3, 4 or 5 engineers under shared billing — the same Pro features, with one owner managing the seat list.

• Still in the works; email matworldai@gmail.com to be notified when it launches.

Yes. Settings → Billing & usage → Manage subscription opens the Stripe customer portal.

• You keep Pro access until the end of your current billing period.

Yes — contact matworldai@gmail.com.

• SSO/SAML, bulk data access, custom integrations, and on-premise deployment.