On Saturday my team was testing transfer creation in the sandbox and were receiving apparent errors from the /token endpoint.
We use the Golang package https://godoc.org/github.com/kolanos/dwolla-v2-go, so we don’t have quite the visibility that we want into the exact response, but from what we understand the returned json was not able to be parsed correctly and the status code was 403.
Looking at the Dwolla status page, it doesn’t look like there were any issues or outages during that time. Thinking closely about our architecture, I’m curious if there would be any issues on your end from hitting the /token endpoint a bunch of times almost simultaneously? We use AWS lambda, and when we receive X number of inbound webhook requests, up to X number of lambda instances will spin up to process those webhooks. All of the failures I see in our logs are related to the /token endpoint.