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Three things to set up before you write any code.

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1. Create your account

Register on EximPe to get your API keys. To start building, sign up on the sandbox. Pick PSP if you collect on behalf of other businesses, or Merchant if you collect only for yourself.

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2. Get your API keys

You need a client_id and a client_secret to call any API. See API Access for your keys, the required headers, and the sandbox and production base URLs.
Send your client_id to the EximPe team after signup. They activate your account and approve your webhook URL and IP in the sandbox.

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3. Set up webhooks

Webhooks are how we tell your server that something happened — money arrived, a payment settled, a refund went through. You need them; there is no other way to find out in real time.
  1. Put a public HTTPS endpoint on your server.
  2. Add its URL in the Developer section of your EximPe Dashboard.
  3. Whitelist EximPe’s IP ranges in your firewall. They are listed in the same place.
See the Webhooks Guide for signature verification and the full event list.
Set up? Read Collection Overview — it shows how a payment works end to end and where to go next.