---
title: "Changes to Read Calculation To Molecule At Index"
method: GET
path: "/calculation/{slug}/molecule_at_index"
---

# Changes to Read Calculation To Molecule At Index

`GET /calculation/{slug}/molecule_at_index`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 8 revisions.

- **2026-11-07** `11711cda3e1b`: 1 breaking, 2 warning
- **2026-10-24** `f32209cc3da2`: 1 info

## Changes

- **2026-11-07** `11711cda3e1b`: 1 breaking, 2 warning
  - the `parameterization` response property const value `opencosmo_rs_24a` was removed for the status `200`
  - added the new `opencosmo_rs_24a` enum value to the `items/cosmo_rs_data/anyOf[subschema #1: COSMORSData]/parameterization` response property for the response status `200`
  - added the new `rowan_cosmors_2026` enum value to the `items/cosmo_rs_data/anyOf[subschema #1: COSMORSData]/parameterization` response property for the response status `200`
- **2026-10-24** `f32209cc3da2`: 1 info
  - added the optional property `items/rotatory_strengths` to the response with the `200` status

---

[Operation](https://skmtc.dev/rowansci/apis/eyrie/docs/calculation/:slug/molecule_at_index/get.md) - [API](https://skmtc.dev/rowansci/apis/eyrie.md) - [Page](https://skmtc.dev/rowansci/apis/eyrie/changes/calculation/:slug/molecule_at_index/get)