Install the PackIndex plugin and Cursor's agent can price materials, check quotes and cost packs while you build — with skills that pick the right tool and cite the source.
Plugin source: github.com/Sercha7780/packindex-mcp. Uses your PackIndex plan; nothing is billed through Cursor.
Illustration of PackIndex in Cursor; the real screens may differ slightly. The PP value is real PackIndex data (free view as of 2026-08-03 · live on Essential).
“What does PET resin cost today?” Value in USD and your currency, with 1-week, 1-month and 1-year change.
Open →“My supplier quotes $1,450/t for PP. Is that fair?” Verdict against the benchmark and its 12-month range.
Open →“Our contract was €1,300/t in March, 60% linked to PP. What should we pay now?”
Open →“Compare kraftliner in Europe and the US” and 12-week outlooks with a confidence grade.
Open →“Design a mailer box for 2 mugs and cost it.” Spec and priced bill of materials — 1 Suite run.
Open →“Who can make my folding carton in Canada?” Live Exchange listings and matched converters.
Open →Only after you confirm. Up to 3 suppliers per request, within your Exchange plan.
Open →Install the PackIndex plugin from the Cursor Marketplace, or open Cursor Settings → Tools & MCP → add a server with the address https://opnplatform.com/api/mcp. On the first tool that needs your account, select Login.
Two skills come with the plugin: packaging-prices (find the right index and cite it with its date) and find-packaging-suppliers (search suppliers and send an RFQ only after you confirm).
No. Price questions work without an account and show the free reference values. Signed in, your own PackIndex plan applies exactly as on the website: live values on Essential and above, Suite runs for Design Studio, PACKIQ credits for agents and your Exchange plan for RFQs.
Only what the assistant passes to a PackIndex tool, such as an index code or a quantity — never your chat history, memories or files.
Remove PackIndex in the assistant, or open opnplatform.com/portal → Settings → MCP Access and revoke it.
PackIndex also works in ChatGPT · Claude · Microsoft Copilot · Grok, and any MCP client — tools, permissions and setup.