> ## Documentation Index
> Fetch the complete documentation index at: https://docs.communityhub.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Data Hub FAQ

> Answers to common questions about Data Hub access, data security, supported data sources, and the developer API.

<Note>
  This page previously described a self-serve SaaS product (free trials, billing plans, a connector catalog) that doesn't match Data Hub. It's been rewritten around what's actually confirmed.
</Note>

## Getting Started

<AccordionGroup>
  <Accordion title="How do I get access to Data Hub?">
    Data Hub is invite-only. There is no self-serve signup for joining an existing organization — ask your organization's Admin to invite you. See [Quickstart](/quickstart).
  </Accordion>

  <Accordion title="Do I need technical skills to use Data Hub?">
    No. Viewing metered entities, variables, and visualizations doesn't require any coding. Building derived variables (formulas referencing other variables) is the closest thing to a technical skill involved, and it's optional.
  </Accordion>
</AccordionGroup>

## Data Sources

<AccordionGroup>
  <Accordion title="What data sources does Data Hub support?">
    Dataloggers (Obvius, JACE, BuildingOS), a sensor platform (Motion), public APIs (AirNow, OpenWeatherMap, GLOS), and generic CSV upload. See [Connecting Data Sources](/guides/connecting-sources).
  </Accordion>

  <Accordion title="How often is data updated?">
    Depends on the source: push-based sources (Obvius, JACE, CSV) send data on their own schedule; polled sources like Motion have a configurable polling interval. See [Polling Intervals](/guides/scheduling-syncs).
  </Accordion>
</AccordionGroup>

## API & Developers

<AccordionGroup>
  <Accordion title="Is there a public API?">
    A read-only **Data API** for programmatic access to variables and their time-series data is in development. See [API Reference: Introduction](/api-reference/introduction) for the confirmed design.
  </Accordion>

  <Accordion title="Are there official SDKs?">
    Not as installable packages. The plan is to generate ready-to-use sample code (Python, R, JavaScript, curl, MATLAB) for a given query directly from the interface, rather than maintain and version separate SDK packages.
  </Accordion>

  <Accordion title="What rate limits apply?">
    The Data API's current default is 60 requests per minute per token, with a maximum 1-year date range per request. These are conservative launch defaults and may be revised. See [Rate Limits](/api-reference/rate-limits).
  </Accordion>
</AccordionGroup>

<Note>
  This page is a stub for questions not yet confirmed one way or the other (data residency, retention policy, pricing/billing) — those aren't documented anywhere in Notion at the time of writing.
</Note>