Create or update multiple accounting vendors
Allows for the creation or updating of multiple vendors in a single request. Maximum 100 vendors per request.
Deprecation notice: This synchronous endpoint is deprecated for high-volume use. Use POST /vendors/bulk-async instead — it avoids request timeouts on large batches and provides progress tracking via the batch polling API. This endpoint remains fully supported for existing integrations.
Headers
OAuth2 authentication flows. Auth server URLs will vary by environment
API key for authentication
API version to use (optional, defaults to latest). Supported values: 1.0.0, 1.1.0.
Client-generated unique key (UUID/ULID recommended). JSON requests: the first 2xx response is cached for 24h and replayed on a same-key retry with a matching body; a different body returns 422. Non-JSON requests (e.g. file uploads): the key is single-use — any same-key retry returns 422 regardless of body. See Idempotency for full details.
Request body
Response
Successfully created or updated