Messages are the unit by which we measure your usage of IEX Cloud data. Every endpoint has an associated message weight which can be found in our docs.

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Testing Environment

To help users test out IEX Cloud and see how their use case translates to estimated message counts and costs, we offer a sandbox testing environment with unlimited message usage.

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See the list of known unofficial IEX API libraries and integrations. If you’d like to have your library, integration, or app added, email us at

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Platform Overview

IEX Cloud Support

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