Validate an EIN application request
Check an EIN application payload for field-shape errors without creating a filing — the same dry-run pre-flight the formation validate endpoints offer. Returns every field error in one pass, including the conditional principal_activity follow-ups for the selected category.
This checks request-field shape only. The business existence check and the responsible-party vault requirements run on the create endpoint, so a payload that passes here can still be rejected when you submit it.
Authorizations
Enter your API key in the format: sk_test_xxxxx or sk_live_xxxxx
Response
Validation result
True when the payload passed every compliance check
All compliance errors found, empty when valid
Non-blocking observations. Currently one entry per top-level field this jurisdiction does not accept — such a field is ignored on create rather than rejected, so this is the only place it surfaces. Empty when there is nothing to report.

