Solid's default rate limit is 100 requests per second for read calls and separately, 100 requests per second for write calls.
This rate limit is applied for both TEST and LIVE modes. If this is exceeded, a 429 status code will be returned to indicate that you have hit the rate limit.
We may reduce limits to prevent abuse, or increase limits to enable high-traffic FinTech apps. If you need a different limit (lower or higher), please create a help desk ticket with the reason for the change, and we will take care of it.