> ## Documentation Index
> Fetch the complete documentation index at: https://docs.realie.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# About the v2 Reference

> The legacy v2 API reference, preserved for existing integrations.

<Warning>
  The live Realie API serves the **v3 data generation** only — the previous
  generation's data is retired. This tab documents the **v2-compatible response
  shape**: the flat field layout existing integrations receive, produced from v3
  data through a compatibility layer. The new standard is the full nested record
  documented in the [v3 API reference](/api-reference/v3/overview); migrate with the
  [v2 → v3 migration guide](/api-reference/v3/migration).
</Warning>

The v2 shape is not a separate dataset: requests to the documented endpoints return
v3-generation data in the v2-compatible response shape. There is no version header or
parameter that returns the old data — it no longer exists.

What that means in practice:

* **Endpoint pages in this tab still work** — the playground calls the live API — but
  responses reflect the v3 data generation, so field values (and a small number of
  field names) can differ from the frozen examples here. Coded values stored before August 19, 2026 decode against the [Pre-v3 Code Tables (Frozen)](/api-reference/v2-legacy-code-tables) archive; current values decode with the [v3 Feature Field Key](/api-reference/v3/feature-key).
* **Most v2 integrations run unchanged.** The response shape is v2-compatible; the
  deltas are catalogued field-by-field in the
  [migration guide](/api-reference/v3/migration).
* **No sunset date has been announced** for this reference. It will remain available
  while v2-era integrations are active.