---
title: "Start building with A1ROUTES"
description: "Find your API, connect your account, and make your first request."
---

## Choose your API

Your API hostname and key depend on the A1ROUTES product you use.

| Product | Hostname | API key |
| --- | --- | --- |
| Number Lookup | `control.a1routes.com` | Main SIP account key |
| BusinessPhoneSystem (A1PBX) | Your assigned `{accountid}.a1routes.com` | Assigned A1PBX key |
| Messaging | Coming soon | To be announced |

## Make your first request

Start with [Number Lookup](/docs/lookup/quickstart) or the [BusinessPhoneSystem quickstart](/docs/a1pbx/quickstart). Keep keys in your server environment and substitute placeholders locally.

## Use your assigned hostname

A1PBX accounts have individual hostnames. The account identifier may be numeric or a company name, such as `acme.a1routes.com`. Preserve it exactly as assigned, including any leading zeros. The documentation domain is not an API server.

## Request access

Contact [A1ROUTES support](mailto:support@a1routes.com) with your account identifier and the operations your integration needs. Never send your API key in an email or support screenshot.

## Before production

Confirm the enabled API version, permitted operations, and response format for your account. A1PBX examples describe the `/app/api/7` interface; availability can vary by installation.