# arthgupta.dev

> Personal site of Arth Gupta. 4 projects live here, each with its own surface.

## Projects
- Calyx: https://calyx.arthgupta.dev — Group calendar that helps your crew find events and actually go together. Partiful meets Google Calendar.
  - https://calyx.arthgupta.dev/about (system design)
- Reach: https://reach.arthgupta.dev — What can you reach from here in N minutes by walking, bike, transit or car, and what is inside that area. Map playground plus a public MCP server for agents. The largest US and Indian cities.
  - https://reach.arthgupta.dev/about (design doc), https://reach.arthgupta.dev/mcp (MCP server: travel-time zones + place search)
- Prices: https://prices.arthgupta.dev — Agent-first price reference aiming at every physical good sold online: per category, the minimum spec that does the job, the cheapest product meeting it by unit price, and what each premium buys. Static JSON, one big table.
  - https://prices.arthgupta.dev/llms.txt (start here), https://prices.arthgupta.dev/index.json, https://prices.arthgupta.dev/api/docs
- ShopBench: https://shopbench.arthgupta.dev — Does a price reference make an AI shopping agent more rational? Same agent, same tasks, with and without the prices source. Construction, dataset, results.
  - https://shopbench.arthgupta.dev/summary.json, https://shopbench.arthgupta.dev/tasks.json, https://shopbench.arthgupta.dev/results.jsonl