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Paygate REST API supports the Client Credentials Flow, which involves an application exchanging its application credentials, such as client ID (your merchantd) and client secret (your API key), for an access token. Tokens are requested towards Token URL: https://test.computop-paygate.com/authorization/oauth/token (for Test system) or https://www.computop-paygate.com/authorization/oauth (for Production system) using standardized framework: https://auth0.com/docs/get-started/authentication-and-authorization-flow/call-your-api-using-the-client-credentials-flow
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