There are two access credentials for APIs. Both credentials/keys are required to access the APIs.

• Client ID and Client Secret– This is available for GSPs, E-commerce Operators and companies (PAN) with an aggregate turnover of more than Rs 500.00 Crores. Client credentials are used to reach the e-invoice system to access the APIs. But using these alone, one cannot generate IRNs.
• Username and Password – This is available for the GTINs. Each GSTIN needs to have this separately to generate IRN. These user credentials are used along with the client credentials to generate the IRN.