> For the complete documentation index, see [llms.txt](https://docs.frequencychain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.frequencychain.org/12.-energy-data-layer-integration/12.3-oracle-and-validation-layer.md).

# 12.3 Oracle and Validation Layer

The integration of real-world data into FreCx is facilitated through an oracle layer. The oracle acts as an intermediary that:

* receives data from external systems
* validates the authenticity and format of the data
* ensures consistency across multiple inputs
* submits verified data to the blockchain

This process is critical because blockchain systems cannot inherently verify external data. The oracle layer introduces a controlled mechanism for bridging this gap while maintaining trust.

Validation may include:

* timestamp verification
* source authentication
* data consistency checks
* aggregation across multiple inputs

Only after these checks are completed is the data considered eligible for on-chain submission.


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