Rate limits - Synci API

Rate limits protect the API and the underlying bank providers. When you exceed a limit, the API responds with 429 Too Many Requests and a JSON message. Where applicable, the response includes a Retry-After header (seconds until you can retry).

Limits

What	Limit
General API requests	100 requests per minute per user
Manual account sync (`POST /finance/accounts/{id}/sync`)	Per account and data type; a `429` means that data was synced recently, and the message says roughly how long to wait
Transfer and rule undo/retry endpoints	6 requests per minute
Webhook test deliveries (`POST /webhooks/{id}/test`)	5 requests per minute
Destination connection refresh	1 request per minute per connection

Bank data itself is refreshed on a schedule that depends on your plan and each connection’s configuration, so polling the API faster than your sync frequency will not surface new data any sooner. For real-time reactions, use Webhooks instead of polling.

Handling `429` responses

Back off and retry after the Retry-After interval (or with exponential backoff if the header is absent).
Spread bulk work over time rather than bursting; with pagination at 100 items per page and 100 requests per minute, you can move a lot of data well within the limits.
Cache data you have already fetched. Transactions and balances only change when a sync runs.