Nice, market data is a good fit for MCP. Two things from having shipped one:
Listing on the official registry, Glama and Smithery took me an afternoon each and that's where most discovery actually happens right now, if you haven't done it yet. And how are you handling upstream rate limits? I run a scheduler that polls ~20 public APIs and the retry patterns an agent produces look nothing like human traffic, which is what got me throttled the first time.