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Historial API Evolution
As per the documented history, the occurrence of web APIs transpired towards the end of 1990 with the launch of Salesforce’s sales automation solution. At that point in time, it was an open resource, awarded to everyone.
Salesforce’s automation tool was XML-driven and the format used for interchanging the data for this tool later got acknowledged as standard SOAP API. It featured message format specifications and encoding-specific rules related to allowing or disallowing requests.
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