API Reference
Add an account-relationship edge
POST
Authorizations
Reevo API key passed as Authorization: Bearer <api-key>.
Body
application/json
Reference-or-match target shape shared by every relationship POST body.
Exactly one of related_record_id / related_record_match must be
present; both or neither raises (mapped to field_value_invalid).
Response
Successful Response
Response for POST / PATCH on one relationship edge (contracts/07 §7.3-7.4).
Carries the single affected RelationshipItem (the write produced exactly
one edge), unlike the paginated SingleRelationshipResponse which carries
a list.