idempotency_key_required

HTTP 400 · type invalid_request_error

When

A create, send, or void with no Idempotency-Key and no external_id.

Fix

Send one.

Where it comes from

• POST /v1/invoices: Create an invoice
• POST /v1/invoices/{id}/send: Send an invoice
• POST /v1/invoices/{id}/void: Void an invoice

All errors