API Updates — May 28, 2026

Parent vendor ID on vendor responses — Vendor endpoints now include a parent_vendor_id field, making it easy to identify vendor parent-child relationships directly from the API. View endpoint

Network merchant ID on transactions — Transaction responses now include a network_merchant_id field containing the card acceptor merchant identifier from the payment network (e.g., Visa), or null when unavailable. View endpoint

Entity scoping for accounting field options — The entity_remote_ids field is now returned on GET /developer/v1/accounting/field-options responses and accepted on POST and PATCH requests, letting you scope field options to specific business entities. View endpoint

Entity scoping for inventory item options — Inventory item option endpoints now support entity_remote_ids on POST, PATCH, and GET operations, enabling per-entity availability control for inventory items. View endpoint

Child vendors endpoint — List child vendors of a parent vendor via GET /developer/v1/vendors/{vendor_id}/children. View endpoint

Funds API (beta) — A full suite of endpoints for managing funds, including creating, listing, updating, terminating, suspending/unsuspending funds, and managing fund members. Funds can be linked to spend programs or configured standalone with spending restrictions, permitted spend types, and accounting rules. View endpoint

Field option filter rules (beta) — New endpoints to bulk create, list, and bulk delete field option filter rules, which define conditional visibility of accounting field options based on selections in other fields. View endpoint

ERP migration readiness endpoint — Mark an inactive API-based accounting connection as ready to migrate via POST /developer/v1/accounting/connection/{connection_id}/ready-to-migrate, enabling the ERP migration flow UI for your customers. View endpoint

Transaction update endpoint (beta) — Update transactions via PATCH /developer/v1/transactions/{transaction_id} to create, replace, or remove line item splits with accounting field selections and memos. View endpoint

Treasury syncable transactions endpoint — List treasury transactions available for syncing to an accounting provider via GET /developer/v1/treasury/syncable-transactions, with filtering by date range, entity, and sync status. View endpoint

New audit log event types — Added Internal impersonation upgraded to read-write, Preview mode entered, Spend settings updated, Vendor parent set, and Vendor parent unset to the audit logs event_type enum. View endpoint

Sync status enum descriptions — The sync_status filter parameter on transactions, reimbursements, transfers, and cashbacks now includes descriptions for NOT_SYNC_READY, SYNCED, and SYNC_READY values.