# My ID & API keys

## My ID & API keys

## Where to find ID & API keys

![](https://2814812280-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhTv8JEzyM5h4cYcL5StH%2Fuploads%2F6O5zmtyh7PCj1YbpLLAH%2FUntitled%20\(8\).png?alt=media\&token=25c3549c-a5c7-4036-9a9f-81d21cfdb64a)

Click `My ID and API Keys` at the top right of the `Merchant account` page to view and edit the merchant's ID and API information.

## Merchant ID

![](https://2814812280-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhTv8JEzyM5h4cYcL5StH%2Fuploads%2FLGvrsoas7yWifQLTmExf%2FUntitled%20\(9\).png?alt=media\&token=eafe384f-375b-4e14-a94a-2048daef41eb)

Merchant ID is automatically issued when you sign up from the Admin page and is used to identify the merchant when using the i'mport module.

[What is Merchant ID?](https://portone.gitbook.io/docs-en/ready/3.)

## Rest API Key & API Secret Key

[How do you use REST API and Secret keys?](https://portone.gitbook.io/docs-en/ready/3.)

To request for a reissuance of the API Secret key, click `Reissue`. Since this invalidates any existing Secret key, check for one in advance.

## Tier code

When setting up a sub-merchant, specify a tier code and use it to call `IMP.agency('Merchant ID', 'tier code')` instead of `IMP.init`.\
\
[What is Tier code?](https://app.gitbook.com/o/nad6nqI7LNE1TGdY19Od/s/hTv8JEzyM5h4cYcL5StH/~/changes/ODVnpYTO5vpALC4y3dhS/tips/agency-and-tier)