# Try Nexus without an account

The Nexus sandbox runs the same tools and the same card as Nexus inside ChatGPT and Claude, with throwaway data and no sign-in. Sessions are deleted 24 hours after the last change.

Source: https://nexus.kushalsm.com/try/

## For people

Open https://nexus.kushalsm.com/try/new — you get a blank day with the real Nexus card. Tap the example buttons to log a meal, a workout or a body weight, then tap an entry on the card to edit it.

## For AI assistants and agents

Pick any session id (4–40 characters: a–z, 0–9, dashes). Every response is JSON.

- Log a meal: `https://nexus.kushalsm.com/try/api/<session>/log?meal=2+eggs+and+toast&kcal=310&protein=16&carbs=28&fat=14&meal_type=breakfast`
- Log a workout: `https://nexus.kushalsm.com/try/api/<session>/log?exercise=Bench+Press&sets=60x8,60x7,55x6&unit=kg`
- Log body weight: `https://nexus.kushalsm.com/try/api/<session>/log?weight=72.4&unit=kg`
- Read the day: `https://nexus.kushalsm.com/try/api/<session>/day`
- Correct an entry: `https://nexus.kushalsm.com/try/api/<session>/edit?id=<entry id>&kcal=250`
- See the card for that session: `https://nexus.kushalsm.com/try/s/<session>`
- Tool list with production names and JSON input schemas: https://nexus.kushalsm.com/try/tools.json

MCP clients can connect without auth to `https://nexus.kushalsm.com/try/mcp` (streamable HTTP, JSON responses), or `https://nexus.kushalsm.com/try/mcp/<session>` to share a session with the browser page. It implements initialize, tools/list, tools/call, resources/list and resources/read (the card, as an MCP Apps resource).

Suggested check: log a meal, read the day, correct the meal using its id and state_version, read the day again. Totals follow the correction, and a second correction with the old state_version is rejected, as in production.

## The full product

In ChatGPT and Claude the assistant does the estimating from text, photo or voice, plus workout plans, history across chats and friends: https://nexus.kushalsm.com/