On 6 March 2026 we will be releasing the Q1 API changes for the VarSome API (stable-api.varsome.com).

The Stable API will update version 13.12.2 to version 13.14.1 with data frozen as of the
4th February 2026. This version has been successfully used in production for over a month.

The most recent version, used by VarSome itself, is always available at api.varsome.com.

Database Updates

The following databases have been updated:

JSON Schema Changes

Variants

### New Endpoints: None

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### Deleted Endpoints: None

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### Modified Endpoints: 1

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POST /lookup/batch/{ref_genome}

- Request body changed

  - Content changed

    - Modified media type: application/json

      - Schema changed

        - Properties changed

          - Modified property: variants

             - MaxItems changed from 200 to 50

Genes

### New Endpoints: None

-----------------------

### Deleted Endpoints: None

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### Modified Endpoints: 1

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POST /genes/batch/{ref_genome}

- Request body changed

  - Content changed

    - Modified media type: application/json

      - Schema changed

        - Properties changed

          - Modified property: genes

            - MaxItems changed from 100 to 10

CNVs

No changes.

Please contact us if you need any further assistance with this release.