| Variable | Required | Description | Default | Version |
| ------------------------------- | -------- |:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- | ------- |
| `VISUALIZE_SOL2UML_ENABLED` | | If `true`, integration with [Rust sol2uml visulizer](https://github.com/blockscout/blockscout-rs/tree/main/visualizer) is enabled. Implemented in [#6401](https://github.com/blockscout/blockscout/pull/6401) | (empty) | master |
| `VISUALIZE_SOL2UML_SERVICE_URL` | | URL of Rust visualizer. Implemented in [#6401](https://github.com/blockscout/blockscout/pull/6401) | (empty) | master |