A composite crypto price depends on source eligibility, quote currency and the calculation applied to eligible observations.
Compare like markets before combining them. Spot and perpetual prices can diverge, and stablecoin-quoted pairs require a conversion decision. Exclude stale inputs by timestamp rather than assuming an open socket means a usable quote.
Record which venues contributed to a result and what happens when the minimum source count is lost. Test an outlier, an inverted book and a missing conversion input; a composite should have an explicit degraded state.
Bring the proposed instrument list, source documentation and consumer workflow to a technical discussion. The agreed integration specification defines coverage, fields, usage permissions and acceptance tests.
| Input identity | Record approved sources, instrument definitions and symbol mappings. |
|---|---|
| Selection policy | Agree primary/backup, aggregation or distribution rules for each relevant consumer. |
| Health signals | Define freshness, source status, outlier handling and recovery thresholds. |
| Operational evidence | Retain policy versions, source changes and the reason for fallback or rejection. |
A production workflow for digital assets needs explicit rules for admitting, selecting and excluding inputs. Normalize definitions before comparing prices. A source that remains connected can still be stale for an individual instrument; expose that distinction in operations.