Rate limits

• 60 requests per minute per key. Each key has its own budget — your calls never eat the merchant's own app budget, and theirs never eat yours.
• Some writes have their own tighter limit (for example 30 shipping updates a minute).
• Past the limit you get 429 Too Many Requests with a Retry-After header (seconds). Wait, then retry.

{ "message": "Too many requests — 60 per minute per key.", "code": "rate_limited" }

Need more? Contact us with your use case.