# Market Index Integration API

**A market index integration** will allow you to continuously feed the Dataloy VMS with updated market rates. From this data, Dataloy VMS can calculate accurate rates automatically, removing cumbersome manual work and reducing the risk of errors.

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At this point in time, only Market Indices of type TC Rate is used for automatic calculations. Indices of other types will be for information only.
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The [MarketIndex](https://dataloy-systems.stoplight.io/docs/dataloyModel/model/schemas/market-index) entity is a simple object; a name, unique code property, and a list of [MarketIndexValues](https://dataloy-systems.stoplight.io/docs/dataloyModel/model/schemas/market-index-value). The MarketIndexValues consists of a date from which it is valid from, and a numeric value.