# Blockchain API Interactions

### Https  calls have this structure: 

`https://<cluster>-<node>.cloud.nxtfi.org/v2/<ENDPOINT>`

#### Description:

`cluster` :  Available public option `test`

`node` : Node number i.g: `001-node`

`Endpoint` : Available public options described in the [API reference](/api-reference/get-node-health.md) section.

### General knowledge specification:&#x20;

As a general rule, on the NxtFi API, each HTTPS call that points towards a directory folder in the storage system must end with a forward slash /, otherwise the response will prompt:

```
{"error": "notFound"}
```

On the other hand, HTTPS calls pointing to files won't admit a forward slash at the end or the file extension. If that is the case, they will also prompt the same error message.

For example  `SUCCESS`:

<https://test-001-node.cloud.nxtfi.org/v2/\\_storage/\\><scope>/\<directory>/

<https://test-001-node.cloud.nxtfi.org/v2/\\_storage/\\><scope>/\<filename>

For example  `{"error": "notFound"}`:

<mark style="color:orange;"><https://test-001-node.cloud.nxtfi.org/v2/\\_storage/\\><scope>/\<directory></mark>

<mark style="color:orange;"><https://test-001-node.cloud.nxtfi.org/v2/\\_storage/\\><scope>/\<filename>/</mark>

<mark style="color:orange;"><https://test-001-node.cloud.nxtfi.org/v2/\\_storage/\\><scope>/\<filename>.json</mark>


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