# Engine

### Supported Blockchains

To retrieve a list of supported blockchains, make a `GET` requests to `/chains`.

{% openapi src="<https://1545901005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTToCQFhAYRMgObGgbSjC%2Fuploads%2FV89o79d3urx40FHQswwW%2Foffblocks-api-spec_master_api.yaml?alt=media&token=762e0468-4f4f-407e-9281-df4ee98be768>" path="/chains" method="get" %}
[offblocks-api-spec\_master\_api.yaml](https://1545901005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTToCQFhAYRMgObGgbSjC%2Fuploads%2FV89o79d3urx40FHQswwW%2Foffblocks-api-spec_master_api.yaml?alt=media\&token=762e0468-4f4f-407e-9281-df4ee98be768)
{% endopenapi %}

This list contains names and [CAIP-2](https://chainagnostic.org/CAIPs/caip-2) compliant chain IDs for all blockchains currently supported by this API instance. Normally, for Sandbox environment this will include all supported testnets and devnets, while for Production this includes mainnets.

For more information on supported blockchains and their status please refer to [supported-blockchains-and-assets](https://docs.offblocks.xyz/overview/supported-blockchains-and-assets "mention").

### Supported Assets

To retrieve a list of supported assets, make a `GET` requests to `/assets`.

{% openapi src="<https://1545901005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTToCQFhAYRMgObGgbSjC%2Fuploads%2FV89o79d3urx40FHQswwW%2Foffblocks-api-spec_master_api.yaml?alt=media&token=762e0468-4f4f-407e-9281-df4ee98be768>" path="/assets" method="get" %}
[offblocks-api-spec\_master\_api.yaml](https://1545901005-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTToCQFhAYRMgObGgbSjC%2Fuploads%2FV89o79d3urx40FHQswwW%2Foffblocks-api-spec_master_api.yaml?alt=media\&token=762e0468-4f4f-407e-9281-df4ee98be768)
{% endopenapi %}

This list contains names, symbols and [CAIP-19](https://chainagnostic.org/CAIPs/caip-19) compliant asset IDs for all assets currently supported by this API instance. Normally, for Sandbox environment this will include all supported assets on testnets and devnets, while for Production this includes assets on mainnets.

For more information on supported assets and their status please refer to [supported-blockchains-and-assets](https://docs.offblocks.xyz/overview/supported-blockchains-and-assets "mention").