We use your API nightly, to add invoices and to email our customers.
Last night, we received errors from 6 of these invoices - but I don’t know why they failed, only that they retuned a 400 bad request response.
Here are the details:
Failing call - /invoices/{id}/send_email
First call - 6th March, 7:00am,
Second call - Just one second later for a different invoice
We re-tried the calls with exponential backoffs, so I don’t think it was rate limiting issue?
Can someone take a look for us?
Thanks