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

# Connections

<AccordionGroup>
  <Accordion title="Where do I store API credentials?">
    Use HTTP Authentication configurations to store credentials separately from the HTTP Client. Reference them across multiple connections without duplicating settings. For sensitive values like API keys, store them as encrypted Environment Variables and reference them using `${VARIABLE_NAME}` syntax.
  </Accordion>

  <Accordion title="What connection types does Alumio support?">
    REST APIs (HTTP), SOAP, databases (MSSQL, MySQL, Oracle, PostgreSQL), Filesystems (FTP, SFTP, S3), Email servers (SMTP, SendGrid), Webhooks, and HTTP Proxies.
  </Accordion>
</AccordionGroup>