Identifiers (read this first)
Atlaas uses a few distinct identifiers. Mixing them up is the most common integration mistake, so they're spelled out here:
| Identifier | What it is | Where it appears |
|---|---|---|
| AtlasAccount id | Your tenant/billing account | /api/public/atlas-accounts/{accountId}/service-keys |
MT5 accountId | The MT5 login number of a terminal (e.g. 5012345) | /api/external/instances/{accountId}/... (trading, market data, account) |
Instance id | The Atlaas instance row UUID | Subscription endpoints, /api/atlas/instances/{id} |
⚠️ The MT5 trading/market-data endpoints are keyed by the MT5
accountId, but the tick/candle subscription endpoints are keyed by the instanceid(UUID). Both look like/api/external/instances/{x}/...; read each endpoint's parameter description carefully. You can get both values from the instance object returned by list/get instance.