Myriad API latency

Myriad's API is a single region Heroku deployment in US East with no order book endpoint and no WebSocket. Its cohort worst 1.27 s p50 (24h, all regions) is mostly geography: from eu-west and Singapore every request crosses an ocean first. When checking whether the Myriad API is down, look at the us-east region figure, since a global latency rise that spares us-east is network weather, not a venue incident. Myriad also runs the tightest keyless request budget in the cohort, covered in the pm-rate-limits bench.