> For the complete documentation index, see [llms.txt](https://docs.cicleo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cicleo.io/developer-integration/usage-off-chain.md).

# Usage Off Chain

<figure><img src="/files/gdulIwPr8BMQZYvfVlHQ" alt=""><figcaption></figcaption></figure>

To integrate Cicleo with your project's off-chain database, you need to set up a URL that Cicleo will call every time a user changes their subscription status.

**Request Type: POST**

### Request Body Example:

<pre class="language-javascript"><code class="lang-javascript"><strong>{
</strong><strong>    address : "0X95CF5354519A6AD2BD7E53FE7763201DFB24BFE4"//Always in Uppercase
</strong><strong>    subscriptionId: 1,
</strong><strong>    secret: "LFHIOENDOUDGHIDG",
</strong><strong>    endTime: 1679484296 //Still in second timestamp
</strong><strong>}
</strong></code></pre>

To fully integrate Cicleo with your project's off-chain database, you need to create an API endpoint that Cicleo can call using a secure key. This ensures maximum security when connecting Cicleo's off-chain capabilities with your project's database.

### Example of backend

```javascript
const express = require("express");
const CICLEO_SECRET = ""//To replace with your secret 

const app = express();

//Create a mydomain.com/subscription/set link that i will use for cicleo
app.post("/subscription/set", (async (req, res, next) => {
    //Verify if caller is cicleo
    if (req.body.secret != CICLEO_SECRET) {
        res.status(401).json({ message: "Wrong secret" });
        return;
    }
        
    //Address of the user subscribed
    const address = req.body.address;
    //The subscriptionid of the user
    const subscriptionId = req.body.subscriptionId;
    //And the unix timestamp (second) of the ending of his subscription
    const endTime = req.body.endTime;
    
    
    //Then do your thing to save it !
);

```


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