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

# Common FAQs

> Review commonly asked integration questions.

<Accordion title="Do you support historical tax rates?">
  We support historical tax rates starting from 2023.
</Accordion>

<Accordion title="What is your rate limit?">
  1,000 requests per minute. If you have a potential use case for over 1,000, let us know.
</Accordion>

<Accordion title="What is your P95 response time?">
  About 400 milliseconds
</Accordion>

<Accordion title="Can we use AI to build our integration?">
  Yes. There are no restrictions to using an AI application or agent to build your integration, as long as it can be certified with a Zamp representative.
</Accordion>

<Accordion title="Can an integration choose to only leverage Zamp for reporting and filing purposes?">
  Yes, calculations can be handled through a different source if you choose.
</Accordion>

<Accordion title="Can I approve and initiate registrations through the APIs?">
  No, not at this time.
</Accordion>

<Accordion title="Do you have any webhooks we can subscribe to?">
  No, not at this time. 
</Accordion>

<Accordion title="Do you support multi-line shipping addresses on a single transaction that can be posted to Zamp?">
  Not on a single transaction in Zamp. If there are multiple shipping addresses on a single transaction, pass each shipping address as an individual transaction call.
</Accordion>

<Accordion title="Does Zamp have multiple environments for testing?">
  Zamp manages sandbox and production accounts within the same environment using the same base URL, but customers will have individual test and live accounts.
</Accordion>