• a Workadu account - sing up for free here
  
• an API-key - learn how to get your key
• predefine you invoice document types that you will use. Note down the ids of these types - find out your account series (document types)
• predefine your invoice document types for transactions, like cash, bank deposit, credit card or your own type (you will need both fiscal and transaction ids) -  find out your account series (document types for transanctions) 
• Decide if your app or workadu will send the invoices to the customer 

1. Authenticate and add headers to your call - reference here 

curl https://app.workadu.com/api/services -u based64_API_KEY:

2. Create a new customer and get its id - reference API customers

curl https://app.workadu.com/api/customers \ 
-u wk_abcd123123abcd1234: \
-d fullname = John Doe \
-d email = john@doe.com

3. Create a draft invoice - reference API invoice

curl https://app.workadu.com/api/invoices \ 
-u wk_abcd123123abcd1234: \
-d customer_id = 1234 \
-d series_id = 2100

series_id is document type id for example invoice or receipt or credit invoice. The id you will find it at the app.

4. Add invoice lines a the invoice - reference API invoice line

curl https://app.workadu.com/api/invoiceline \ 
-u wk_abcd123123abcd1234: \
-d  invoice_id = 1231 \
-d description=  "2 days charge" \
-d amount = 12.00

5. Publish the invoice - reference API invoice publish

curl https://app.workadu.com/invoices/publish \ 
-u wk_abcd123123abcd1234: \
-d  invoice_id = 1231 \
-d send = true \
-d aade_send = true

send option will publish and send the invoice to customer, aade_send will publish and send the invoice to myData (AADE, greek tax system)

• Upgrade your workadu subscription - check plans and upgrade
  
• Get your myData api keys. You must have an aade user account - click here to login and issue the keys (ERP API keys)
• Enable myData integration from integrations panel at your workadu account (you will need myData api keys) -watch the how to video (in greek) 
• Start issuing invoices