Guides

WhatsApp API setup, multiple numbers and a free sandbox

HelloHop gives each linked WhatsApp number a channel ID and lets you send from your code with a channel key or an account key. Start with a free sandbox, then add paid channels when you need them. These questions explain the setup, several numbers in one account, and the sandbox.

Facts (as of October 2026, API v1)

  • HelloHop is an independent service, not affiliated with or endorsed by Meta or WhatsApp.
  • An account key works with every number the account owns.

Do I need Meta approval to send WhatsApp messages from code?

HelloHop's setup steps are to sign in, link your WhatsApp number by QR or code, and create a token in the console. WhatsApp sets its own rules for the number. See the quickstart for the setup this service provides.

Can one API run several WhatsApp numbers?

HelloHop lets an account key work with every number the account owns. Each linked number has its own channel ID, and a channel key works with just that channel. Use the channel ID in each request path.

Is there a free WhatsApp API sandbox?

HelloHop includes one free sandbox channel per account. You still link a real WhatsApp number. The sandbox includes 180 messages a day, 10 new chats a month and 1,500 API calls a month; see the limits page for the complete allowances and reset times.

Questions

Is HelloHop the WhatsApp Business API?
No. HelloHop links your own WhatsApp number as a linked device. HelloHop is an independent service, not affiliated with or endorsed by Meta or WhatsApp.
Do I need Meta approval to send WhatsApp messages from code?
HelloHop's setup steps are to sign in, link your WhatsApp number by QR or code, and create a token in the console. WhatsApp sets its own rules for the number. See the quickstart for the setup this service provides.
Can one API run several WhatsApp numbers?
HelloHop lets an account key work with every number the account owns. Each linked number has its own channel ID, and a channel key works with just that channel. Use the channel ID in each request path.
Is there a free WhatsApp API sandbox?
HelloHop includes one free sandbox channel per account. You still link a real WhatsApp number. The sandbox includes 180 messages a day, 10 new chats a month and 1,500 API calls a month; see the limits page for the complete allowances and reset times.

Free sandbox, forever. Add a real number when you're ready.

Start free

HelloHop is an independent WhatsApp API for developers: send and receive messages, automate groups and communities, and get signed webhooks with a free sandbox. Not affiliated with WhatsApp or Meta. You link your own number.