API connection from OrderBooking web system to E-Conomic

we need a connection between our online OrderBooking system (web) and E-conomic erp system - Solution must be written in C#, will be hosted at [login to view URL] o See this service as a API wrapper o Create customer o Create products o Create orders o Logic for, if we send the same data again, should not create double, but be rejected or update data  Could be a new address, ex. customer, with same customer ID.  Could be new name, price, ect. for an product, given product ID.  Ect. - Solution should be called by HTTP POST, example o ”/?cmd=customer&...” + post form o ”/?cmd=product&...” + post form o ”/?cmd=order&...” + post form o Think of call 1-1, meaning if we need to create 10 products, we make 10 request. Let’s keep it simple, it’s a script solution calling this service, no .Net. o Return string ”true/false” in body. Fields from our database, we like to send [customer_contacts] - customer_contacts_id (text 50) - customer_contacts_company (text 100) - customer_contacts_company_vat (text 50) - customer_contacts_name (text 100) - customer_contacts_address1 (text 100) - customer_contacts_address2 (text 100) - customer_contacts_zipcode (text 50) - customer_contacts_city (text 50) - customer_contacts_country (text 50) - customer_contacts_phone (text 50) - customer_contacts_fax (text 50) - customer_contacts_mobile (text 50) - customer_contacts_email (text 255) [orders] - orders_no (int) – orderno - orders_ref_customer (text 50) – customer ref - orders_ref_our (text 50) – our ref - orders_terms_payment (text 50) - payment term - orders_currency (text 10) – currency code (DKK, EUR...) - orders_date_payment (datetime) – payment date [orders_products] - orders_products_id (text 50) – product no - orders_products_name (text 50) – product name - orders_products_quantity (real) – quantity - orders_products_price (real) – price - orders_products_rebate (real) – discount (percentage) - orders_products_unit (text 50) – unit (pc, md…) - orders_products_comment (255) – comment More about the E-conomic API can be found here: https://www.e-conomic.com/developer#_ga=2.241125891.1440943472.1524492006-1091610109.1524492006