I need a 1-2 hour meeting/tutorial by desktop share with an expert to explain connecting my website to Letterstream using their API, and using http POST

Hello, I would be more than happy to help you navigate these APIs. 28+ years in the telecom industry with some hair raising APIs has made me a formidable opponent. Now looking at your Postman POST request it doesn't look right. I can't find their API specs but I am sure once you replace those '$' variables with real data the authentication might work better. I am more than happy to help. About me: ex-CTO of the telecoms industry specializing in complex integrations and automations. If you would be so kind as to make contact we can get you sorted. Warmest Regards, Stephen Lombard [login to view URL]

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hello it seems you did not pass any authentication parameters , or maybe you did but i cannot see it in the the post man values . Most services require some sort of API key to function and that is what is it complaining about . I can take a look if you want . Thanks