> For the complete documentation index, see [llms.txt](https://docs.cotter.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cotter.app/api-reference/oauth-tokens-api.md).

# OAuth Tokens API

## Renewing Tokens using Refresh Token

If Cotter's SDK doesn't support auto renewal, or if you you need to renew the tokens manually, you can make an HTTP request to Cotter's Server to renew the tokens using a `refresh_token`.

```javascript
curl -XPOST \
-H 'API_KEY_ID: <YOUR API KEY ID>' \
-H "Content-type: application/json" \
-d '{
  "grant_type": "refresh_token",
  "refresh_token": "<REFRESH_TOKEN>"
}' 'https://www.cotter.app/api/v0/token/<YOUR API KEY ID>'
```

## Get Token using Refresh Token

<mark style="color:green;">`POST`</mark> `https://www.cotter.app/api/v0/token/<YOUR API KEY ID>`

Getting new `access_token` and `id_token` using `refresh_token`

#### Path Parameters

| Name         | Type   | Description       |
| ------------ | ------ | ----------------- |
| API\_KEY\_ID | string | Your `API_KEY_ID` |

#### Headers

| Name         | Type   | Description       |
| ------------ | ------ | ----------------- |
| Content-type | string | application/json  |
| API\_KEY\_ID | string | Your `API_KEY_ID` |

#### Request Body

| Name           | Type   | Description                   |
| -------------- | ------ | ----------------------------- |
| grant\_type    | string | Grant type is `refresh_token` |
| refresh\_token | string | Your `refresh_token`          |

{% tabs %}
{% tab title="200 Returns a new access\_token and id\_token. Does not return a new refresh\_token" %}

```javascript
{
  "access_token": "eyJhbGciOiJFU...",
  "auth_method": "OTP",
  "expires_in": 3600, // expiry in seconds
  "id_token": "eyJhbGciOiJFUzI1N...",
  "refresh_token": "234:w3tlkw3jtwk...", // NEW refresh token
  "token_type": "Bearer"
}
```

{% endtab %}
{% endtabs %}

### **Refresh Token Rotation**

{% hint style="warning" %}
Note that **this returns a new `refresh_token` and invalidates the old `refresh_token`**
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.cotter.app/api-reference/oauth-tokens-api.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.