# OAuth2 Implicit Grant

[“Implicit Grant” in the OAuth2 RFC](https://datatracker.ietf.org/doc/html/rfc6749#section-4.2)

1. Send the user you want to authenticate to your registered redirect URI. An authorization page will ask the user to sign up or log into Pulsoid and allow the user to choose whether to authorize your application/identity system.

Create a `<a href="">login</a>`:

```bash
GET https://pulsoid.net/oauth2/authorize
    ?client_id=<your client ID>
    &redirect_uri=<your registered redirect URI>
    &response_type=token
    &scope=<space-separated list of scopes>
    &state=<unique token, generated by your application>
```

Parameters explained:

<table><thead><tr><th width="198">Name</th><th width="118.33333333333331">Type</th><th>Description</th></tr></thead><tbody><tr><td>client_id</td><td>string</td><td>Your client ID.</td></tr><tr><td>redirect_uri</td><td>string</td><td>Your registered redirect URI. This must exactly match the redirect URI registered in the prior.</td></tr><tr><td>response_type</td><td>string</td><td>Should be always <code>token</code></td></tr><tr><td>scope</td><td>string</td><td>Comma-separated list of scopes.</td></tr><tr><td>state</td><td>string</td><td>Your unique token, generated by your application. This is an OAuth 2.0 opaque value, used to avoid CSRF attacks. This value is echoed back in the response.</td></tr></tbody></table>

In our example, you request access to read heart rate data and send the user to <http://localhost>

```bash
GET 'https://pulsoid.net/oauth2/authorize?response_type=token&client_id=3d3fa070-8358-4984-ae32-94392185df63&redirect_uri=http://localhost&scope=data:heart_rate:read&state=a52beaeb-c491-4cd3-b915-16fed71e17a8'
```

2. If the user authorizes your application, the user is redirected to your redirect URL:

```bash
https://<your registered redirect URI>/#token=token_type=bearer&access_token=<access token>&expires_in=90000&scope=data:heart_rate:read&state=<echoed back state your application path on authorization step> 
```

3. After redirecting the application developer can access access\_token from the fragment of the page's URL. [Validate authorization token.](/access-token-management/validate-authorization-token.md)

[How To Validate Authorization Token?](/access-token-management/validate-authorization-token.md)


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