> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/extra-features-scores-graphs-teams-nutrition-cgm/custom-hosted-graph-session-types.md).

# Which hosted graph session types exist?

Only some metrics have **named** hosted graph session types (for example `SLEEP_HRV_SUMMARY`, `SLEEP_RESPIRATORY_RATE_SUMMARY`).

For anything else, **create a custom session** by passing a dot-notation field path that matches the webhook payload structure, instead of a named type.

* Custom sessions can only be created via the API: `POST /v2/graphs/sessions` with `graph_type` set to the path (not the dashboard UI).
* The response returns an `id` you use exactly like a named session id.