You are using standard OData Service for integration, but you are unable to get token using GET method.
SAP Cloud for Customer
Reproducing the Issue
Execute GET call https://myXXXXXX.crm.ondemand.com/sap/c4c/odata/v1/c4codataapi/$metadata (where XXXXXX is the tenant URL)
For communication arrangement user for OData, x-csrf-token is not returned with GET calls, because such user are intended to be used between system to system integration. Therefore, the x-csrf-tokens are not required for POST, PATCH, PUT, and DELETE calls.
Fetch token, standard OData service, integration, communication arrangement, technical user, , KBA , AP-RC-ODF , OData framework (C4C Only) , Problem