---
title: "Changes to Get the current CO2 MOER index"
method: GET
path: "/v3/signal-index"
---

# Changes to Get the current CO2 MOER index

`GET /v3/signal-index`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 5 revisions.

- **2026-10-31** `78bb9ea82f40`: 1 warning, 1 info
- **2026-07-13** `2c85341b2839`: 3 breaking, 1 warning, 3 info

## Changes

- **2026-10-31** `78bb9ea82f40`: 1 warning, 1 info
  - added the new `synthetic_vre_potential` enum value to the `meta/model/anyOf[subschema #1: V3ModelMetadata]/type/anyOf[subschema #1: ModelTypes]/` response property for the response status `200`
  - the endpoint scheme security `BearerAuth` was added to the API
- **2026-07-13** `2c85341b2839`: 3 breaking, 1 warning, 3 info
  - removed the enum value `co2_moer` from the `query` request parameter `signal_type`
  - the `meta/model` response's property type changed from `object` to no type for status `200`
  - removed the required property `meta/model/date` from the response with the `200` status
  - removed the optional property `meta/model/type` from the response with the `200` status
  - added `#/components/schemas/V3ModelMetadata, subschema #2` to the `meta/model` response property `anyOf` list for the response status `200`
  - the `signal_type` response property const value `co2_moer` was added for the status `200`
  - removed the `co2_moer` enum value from the `meta/signal_type` response property for the response status `200`

---

[Operation](https://skmtc.dev/watttime/apis/watttime-data-api/docs/v3/signal-index/get.md) - [API](https://skmtc.dev/watttime/apis/watttime-data-api.md) - [Page](https://skmtc.dev/watttime/apis/watttime-data-api/changes/v3/signal-index/get)