get https://marketplace.walmartapis.com/v3/token/detail
This process retrieves the access permissions granted by sellers to applications in the context of OAuth 2.0. The scope encompasses various API categories, each with its respective access levels, for example Reports: View Only, Item: Full Access, etc.
Get access token by providing Client ID and Client Secret.
An access token expires after a certain interval, so you will have to refresh a user's access token. You could use refresh token, obtained from the token API call using authorization code grant type, to get a new access token. Refresh tokens remain valid for a year.
Guide reference - authorization_code
Guide reference - refresh_token
Guide reference - client_credentials